/* Tree inlining.
- Copyright 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ Free Software Foundation, Inc.
Contributed by Alexandre Oliva <aoliva@redhat.com>
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "params.h"
#include "input.h"
#include "insn-config.h"
-#include "integrate.h"
#include "varray.h"
#include "hashtab.h"
-#include "pointer-set.h"
-#include "splay-tree.h"
#include "langhooks.h"
+#include "basic-block.h"
+#include "tree-iterator.h"
#include "cgraph.h"
#include "intl.h"
#include "tree-mudflap.h"
+#include "tree-flow.h"
#include "function.h"
+#include "ggc.h"
+#include "tree-flow.h"
#include "diagnostic.h"
+#include "except.h"
+#include "debug.h"
+#include "pointer-set.h"
+#include "ipa-prop.h"
+#include "value-prof.h"
+#include "tree-pass.h"
+#include "target.h"
+#include "integrate.h"
/* I'm not real happy about this, but we need to handle gimple and
non-gimple trees. */
-#include "tree-iterator.h"
#include "tree-gimple.h"
+/* Inlining, Cloning, Versioning, Parallelization
+
+ Inlining: a function body is duplicated, but the PARM_DECLs are
+ remapped into VAR_DECLs, and non-void RETURN_EXPRs become
+ GIMPLE_MODIFY_STMTs that store to a dedicated returned-value variable.
+ The duplicated eh_region info of the copy will later be appended
+ to the info for the caller; the eh_region info in copied throwing
+ statements and RESX_EXPRs is adjusted accordingly.
+
+ Cloning: (only in C++) We have one body for a con/de/structor, and
+ multiple function decls, each with a unique parameter list.
+ Duplicate the body, using the given splay tree; some parameters
+ will become constants (like 0 or 1).
+
+ Versioning: a function body is duplicated and the result is a new
+ function rather than into blocks of an existing function as with
+ inlining. Some parameters will become constants.
+
+ Parallelization: a region of a function is duplicated resulting in
+ a new function. Variables may be replaced with complex expressions
+ to enable shared variable semantics.
+
+ All of these will simultaneously lookup any callgraph edges. If
+ we're going to inline the duplicated function body, and the given
+ function has some cloned callgraph nodes (one for each place this
+ function will be inlined) those callgraph edges will be duplicated.
+ If we're cloning the body, those callgraph edges will be
+ updated to point into the new body. (Note that the original
+ callgraph node and edge list will not be altered.)
+
+ See the CALL_EXPR handling case in copy_body_r (). */
+
/* 0 if we should not perform inlining.
1 if we should expand functions calls inline at the tree level.
2 if we should consider *all* functions to be inline
o Provide heuristics to clamp inlining of recursive template
calls? */
-/* Data required for function inlining. */
-typedef struct inline_data
-{
- /* A stack of the functions we are inlining. For example, if we are
- compiling `f', which calls `g', which calls `h', and we are
- inlining the body of `h', the stack will contain, `h', followed
- by `g', followed by `f'. The first few elements of the stack may
- contain other functions that we know we should not recurse into,
- even though they are not directly being inlined. */
- varray_type fns;
- /* The index of the first element of FNS that really represents an
- inlined function. */
- unsigned first_inlined_fn;
- /* The label to jump to when a return statement is encountered. If
- this value is NULL, then return statements will simply be
- remapped as return statements, rather than as jumps. */
- tree ret_label;
- /* The VAR_DECL for the return value. */
- tree retvar;
- /* The map from local declarations in the inlined function to
- equivalents in the function into which it is being inlined. */
- splay_tree decl_map;
- /* Nonzero if we are currently within the cleanup for a
- TARGET_EXPR. */
- int in_target_cleanup_p;
- /* A list of the functions current function has inlined. */
- varray_type inlined_fns;
- /* We use the same mechanism to build clones that we do to perform
- inlining. However, there are a few places where we need to
- distinguish between those two situations. This flag is true if
- we are cloning, rather than inlining. */
- bool cloning_p;
- /* Similarly for saving function body. */
- bool saving_p;
- /* Hash table used to prevent walk_tree from visiting the same node
- umpteen million times. */
- htab_t tree_pruner;
- /* Callgraph node of function we are inlining into. */
- struct cgraph_node *node;
- /* Callgraph node of currently inlined function. */
- struct cgraph_node *current_node;
- /* Statement iterator. We need this so we can keep the tree in
- gimple form when we insert the inlined function. It is not
- used when we are not dealing with gimple trees. */
- tree_stmt_iterator tsi;
-} inline_data;
+/* Weights that estimate_num_insns uses for heuristics in inlining. */
-/* Prototypes. */
+eni_weights eni_inlining_weights;
+
+/* Weights that estimate_num_insns uses to estimate the size of the
+ produced code. */
-/* The approximate number of instructions per statement. This number
- need not be particularly accurate; it is used only to make
- decisions about when a function is too big to inline. */
-#define INSNS_PER_STMT (10)
+eni_weights eni_size_weights;
-static tree copy_body_r (tree *, int *, void *);
-static tree copy_body (inline_data *);
-static tree expand_call_inline (tree *, int *, void *);
-static void expand_calls_inline (tree *, inline_data *);
+/* Weights that estimate_num_insns uses to estimate the time necessary
+ to execute the produced code. */
+
+eni_weights eni_time_weights;
+
+/* Prototypes. */
+
+static tree declare_return_variable (copy_body_data *, tree, tree, tree *);
static bool inlinable_function_p (tree);
-static tree remap_decl (tree, inline_data *);
-static tree remap_type (tree, inline_data *);
-static tree initialize_inlined_parameters (inline_data *, tree,
- tree, tree, tree);
-static void remap_block (tree *, inline_data *);
-static tree remap_decls (tree, inline_data *);
-static void copy_bind_expr (tree *, int *, inline_data *);
+static void remap_block (tree *, copy_body_data *);
+static tree remap_decls (tree, copy_body_data *);
+static void copy_bind_expr (tree *, int *, copy_body_data *);
static tree mark_local_for_remap_r (tree *, int *, void *);
static void unsave_expr_1 (tree);
static tree unsave_r (tree *, int *, void *);
-static void declare_inline_vars (tree bind_expr, tree vars);
+static void declare_inline_vars (tree, tree);
static void remap_save_expr (tree *, void *, int *);
+static void add_lexical_block (tree current_block, tree new_block);
+static tree copy_decl_to_var (tree, copy_body_data *);
+static tree copy_result_decl_to_var (tree, copy_body_data *);
+static tree copy_decl_maybe_to_var (tree, copy_body_data *);
/* Insert a tree->tree mapping for ID. Despite the name suggests
that the trees should be variables, it is used for more than that. */
-static void
-insert_decl_map (inline_data *id, tree key, tree value)
+void
+insert_decl_map (copy_body_data *id, tree key, tree value)
{
- splay_tree_insert (id->decl_map, (splay_tree_key) key,
- (splay_tree_value) value);
+ *pointer_map_insert (id->decl_map, key) = value;
/* Always insert an identity map as well. If we see this same new
node again, we won't want to duplicate it a second time. */
if (key != value)
- splay_tree_insert (id->decl_map, (splay_tree_key) value,
- (splay_tree_value) value);
+ *pointer_map_insert (id->decl_map, value) = value;
}
-/* Remap DECL during the copying of the BLOCK tree for the function.
- We are only called to remap local variables in the current function. */
+/* Construct new SSA name for old NAME. ID is the inline context. */
static tree
-remap_decl (tree decl, inline_data *id)
+remap_ssa_name (tree name, copy_body_data *id)
+{
+ tree new;
+ tree *n;
+
+ gcc_assert (TREE_CODE (name) == SSA_NAME);
+
+ n = (tree *) pointer_map_contains (id->decl_map, name);
+ if (n)
+ return *n;
+
+ /* Do not set DEF_STMT yet as statement is not copied yet. We do that
+ in copy_bb. */
+ new = remap_decl (SSA_NAME_VAR (name), id);
+ /* We might've substituted constant or another SSA_NAME for
+ the variable.
+
+ Replace the SSA name representing RESULT_DECL by variable during
+ inlining: this saves us from need to introduce PHI node in a case
+ return value is just partly initialized. */
+ if ((TREE_CODE (new) == VAR_DECL || TREE_CODE (new) == PARM_DECL)
+ && (TREE_CODE (SSA_NAME_VAR (name)) != RESULT_DECL
+ || !id->transform_return_to_modify))
+ {
+ new = make_ssa_name (new, NULL);
+ insert_decl_map (id, name, new);
+ SSA_NAME_OCCURS_IN_ABNORMAL_PHI (new)
+ = SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name);
+ TREE_TYPE (new) = TREE_TYPE (SSA_NAME_VAR (new));
+ if (IS_EMPTY_STMT (SSA_NAME_DEF_STMT (name)))
+ {
+ /* By inlining function having uninitialized variable, we might
+ extend the lifetime (variable might get reused). This cause
+ ICE in the case we end up extending lifetime of SSA name across
+ abnormal edge, but also increase register presure.
+
+ We simply initialize all uninitialized vars by 0 except for case
+ we are inlining to very first BB. We can avoid this for all
+ BBs that are not withing strongly connected regions of the CFG,
+ but this is bit expensive to test.
+ */
+ if (id->entry_bb && is_gimple_reg (SSA_NAME_VAR (name))
+ && TREE_CODE (SSA_NAME_VAR (name)) != PARM_DECL
+ && (id->entry_bb != EDGE_SUCC (ENTRY_BLOCK_PTR, 0)->dest
+ || EDGE_COUNT (id->entry_bb->preds) != 1))
+ {
+ block_stmt_iterator bsi = bsi_last (id->entry_bb);
+ tree init_stmt
+ = build_gimple_modify_stmt (new,
+ fold_convert (TREE_TYPE (new),
+ integer_zero_node));
+ bsi_insert_after (&bsi, init_stmt, BSI_NEW_STMT);
+ SSA_NAME_DEF_STMT (new) = init_stmt;
+ SSA_NAME_IS_DEFAULT_DEF (new) = 0;
+ }
+ else
+ {
+ SSA_NAME_DEF_STMT (new) = build_empty_stmt ();
+ if (gimple_default_def (id->src_cfun, SSA_NAME_VAR (name)) == name)
+ set_default_def (SSA_NAME_VAR (new), new);
+ }
+ }
+ }
+ else
+ insert_decl_map (id, name, new);
+ return new;
+}
+
+/* Remap DECL during the copying of the BLOCK tree for the function. */
+
+tree
+remap_decl (tree decl, copy_body_data *id)
{
- splay_tree_node n = splay_tree_lookup (id->decl_map, (splay_tree_key) decl);
- tree fn = VARRAY_TOP_TREE (id->fns);
+ tree *n;
+ tree fn;
- /* See if we have remapped this declaration. If we didn't already have an
- equivalent for this declaration, create one now. */
+ /* We only remap local variables in the current function. */
+ fn = id->src_fn;
+
+ /* See if we have remapped this declaration. */
+
+ n = (tree *) pointer_map_contains (id->decl_map, decl);
+
+ /* If we didn't already have an equivalent for this declaration,
+ create one now. */
if (!n)
{
/* Make a copy of the variable or label. */
- tree t = copy_decl_for_inlining (decl, fn, VARRAY_TREE (id->fns, 0));
+ tree t = id->copy_decl (decl, id);
+
+ /* Remember it, so that if we encounter this local entity again
+ we can reuse this copy. Do this early because remap_type may
+ need this decl for TYPE_STUB_DECL. */
+ insert_decl_map (id, decl, t);
+
+ if (!DECL_P (t))
+ return t;
/* Remap types, if necessary. */
TREE_TYPE (t) = remap_type (TREE_TYPE (t), id);
if (TREE_CODE (t) == TYPE_DECL)
DECL_ORIGINAL_TYPE (t) = remap_type (DECL_ORIGINAL_TYPE (t), id);
- else if (TREE_CODE (t) == PARM_DECL)
- DECL_ARG_TYPE_AS_WRITTEN (t)
- = remap_type (DECL_ARG_TYPE_AS_WRITTEN (t), id);
/* Remap sizes as necessary. */
walk_tree (&DECL_SIZE (t), copy_body_r, id, NULL);
walk_tree (&DECL_QUALIFIER (t), copy_body_r, id, NULL);
}
-#if 0
- /* FIXME handle anon aggrs. */
- if (! DECL_NAME (t) && TREE_TYPE (t)
- && lang_hooks.tree_inlining.anon_aggr_type_p (TREE_TYPE (t)))
+ if (cfun && gimple_in_ssa_p (cfun)
+ && (TREE_CODE (t) == VAR_DECL
+ || TREE_CODE (t) == RESULT_DECL || TREE_CODE (t) == PARM_DECL))
{
- /* For a VAR_DECL of anonymous type, we must also copy the
- member VAR_DECLS here and rechain the DECL_ANON_UNION_ELEMS. */
- tree members = NULL;
- tree src;
-
- for (src = DECL_ANON_UNION_ELEMS (t); src;
- src = TREE_CHAIN (src))
+ tree def = gimple_default_def (id->src_cfun, decl);
+ get_var_ann (t);
+ if (TREE_CODE (decl) != PARM_DECL && def)
{
- tree member = remap_decl (TREE_VALUE (src), id);
-
- gcc_assert (!TREE_PURPOSE (src));
- members = tree_cons (NULL, member, members);
+ tree map = remap_ssa_name (def, id);
+ /* Watch out RESULT_DECLs whose SSA names map directly
+ to them. */
+ if (TREE_CODE (map) == SSA_NAME
+ && IS_EMPTY_STMT (SSA_NAME_DEF_STMT (map)))
+ set_default_def (t, map);
}
- DECL_ANON_UNION_ELEMS (t) = nreverse (members);
+ add_referenced_var (t);
}
-#endif
-
- /* Remember it, so that if we encounter this local entity
- again we can reuse this copy. */
- insert_decl_map (id, decl, t);
return t;
}
- return unshare_expr ((tree) n->value);
+ return unshare_expr (*n);
}
static tree
-remap_type (tree type, inline_data *id)
+remap_type_1 (tree type, copy_body_data *id)
{
- splay_tree_node node;
tree new, t;
- if (type == NULL)
- return type;
-
- /* See if we have remapped this type. */
- node = splay_tree_lookup (id->decl_map, (splay_tree_key) type);
- if (node)
- return (tree) node->value;
-
- /* The type only needs remapping if it's variably modified by a variable
- in the function we are inlining. */
- if (! variably_modified_type_p (type, VARRAY_TOP_TREE (id->fns)))
- {
- insert_decl_map (id, type, type);
- return type;
- }
-
/* We do need a copy. build and register it now. If this is a pointer or
reference type, remap the designated type and make a new pointer or
reference type. */
{
t = remap_type (t, id);
TYPE_MAIN_VARIANT (new) = t;
- TYPE_NEXT_VARIANT (new) = TYPE_MAIN_VARIANT (t);
+ TYPE_NEXT_VARIANT (new) = TYPE_NEXT_VARIANT (t);
TYPE_NEXT_VARIANT (t) = new;
}
else
TYPE_NEXT_VARIANT (new) = NULL;
}
+ if (TYPE_STUB_DECL (type))
+ TYPE_STUB_DECL (new) = remap_decl (TYPE_STUB_DECL (type), id);
+
/* Lazily create pointer and reference types. */
TYPE_POINTER_TO (new) = NULL;
TYPE_REFERENCE_TO (new) = NULL;
{
case INTEGER_TYPE:
case REAL_TYPE:
+ case FIXED_POINT_TYPE:
case ENUMERAL_TYPE:
case BOOLEAN_TYPE:
- case CHAR_TYPE:
t = TYPE_MIN_VALUE (new);
if (t && TREE_CODE (t) != INTEGER_CST)
walk_tree (&TYPE_MIN_VALUE (new), copy_body_r, id, NULL);
case RECORD_TYPE:
case UNION_TYPE:
case QUAL_UNION_TYPE:
- walk_tree (&TYPE_FIELDS (new), copy_body_r, id, NULL);
+ {
+ tree f, nf = NULL;
+
+ for (f = TYPE_FIELDS (new); f ; f = TREE_CHAIN (f))
+ {
+ t = remap_decl (f, id);
+ DECL_CONTEXT (t) = new;
+ TREE_CHAIN (t) = nf;
+ nf = t;
+ }
+ TYPE_FIELDS (new) = nreverse (nf);
+ }
break;
- case FILE_TYPE:
case OFFSET_TYPE:
default:
/* Shouldn't have been thought variable sized. */
return new;
}
+tree
+remap_type (tree type, copy_body_data *id)
+{
+ tree *node;
+ tree tmp;
+
+ if (type == NULL)
+ return type;
+
+ /* See if we have remapped this type. */
+ node = (tree *) pointer_map_contains (id->decl_map, type);
+ if (node)
+ return *node;
+
+ /* The type only needs remapping if it's variably modified. */
+ if (! variably_modified_type_p (type, id->src_fn))
+ {
+ insert_decl_map (id, type, type);
+ return type;
+ }
+
+ id->remapping_type_depth++;
+ tmp = remap_type_1 (type, id);
+ id->remapping_type_depth--;
+
+ return tmp;
+}
+
static tree
-remap_decls (tree decls, inline_data *id)
+remap_decls (tree decls, copy_body_data *id)
{
tree old_var;
tree new_decls = NULL_TREE;
{
tree new_var;
+ /* We can not chain the local static declarations into the local_decls
+ as we can't duplicate them or break one decl rule. Go ahead and link
+ them into local_decls. */
+ if (!auto_var_in_fn_p (old_var, id->src_fn)
+ && !DECL_EXTERNAL (old_var))
+ {
+ cfun->local_decls = tree_cons (NULL_TREE, old_var,
+ cfun->local_decls);
+ continue;
+ }
+
/* Remap the variable. */
new_var = remap_decl (old_var, id);
therein. And hook the new block into the block-tree. */
static void
-remap_block (tree *block, inline_data *id)
+remap_block (tree *block, copy_body_data *id)
{
tree old_block;
tree new_block;
new_block = make_node (BLOCK);
TREE_USED (new_block) = TREE_USED (old_block);
BLOCK_ABSTRACT_ORIGIN (new_block) = old_block;
+ BLOCK_SOURCE_LOCATION (new_block) = BLOCK_SOURCE_LOCATION (old_block);
*block = new_block;
/* Remap its variables. */
BLOCK_VARS (new_block) = remap_decls (BLOCK_VARS (old_block), id);
- fn = VARRAY_TREE (id->fns, 0);
-#if 1
- /* FIXME! It shouldn't be so hard to manage blocks. Rebuilding them in
- rest_of_compilation is a good start. */
- if (id->cloning_p)
- /* We're building a clone; DECL_INITIAL is still
- error_mark_node, and current_binding_level is the parm
- binding level. */
- lang_hooks.decls.insert_block (new_block);
- else
- {
- /* Attach this new block after the DECL_INITIAL block for the
- function into which this block is being inlined. In
- rest_of_compilation we will straighten out the BLOCK tree. */
- tree *first_block;
- if (DECL_INITIAL (fn))
- first_block = &BLOCK_CHAIN (DECL_INITIAL (fn));
- else
- first_block = &DECL_INITIAL (fn);
- BLOCK_CHAIN (new_block) = *first_block;
- *first_block = new_block;
- }
-#endif
+ fn = id->dst_fn;
+
+ if (id->transform_lang_insert_block)
+ id->transform_lang_insert_block (new_block);
+
/* Remember the remapped block. */
insert_decl_map (id, old_block, new_block);
}
+/* Copy the whole block tree and root it in id->block. */
+static tree
+remap_blocks (tree block, copy_body_data *id)
+{
+ tree t;
+ tree new = block;
+
+ if (!block)
+ return NULL;
+
+ remap_block (&new, id);
+ gcc_assert (new != block);
+ for (t = BLOCK_SUBBLOCKS (block); t ; t = BLOCK_CHAIN (t))
+ add_lexical_block (new, remap_blocks (t, id));
+ return new;
+}
+
static void
copy_statement_list (tree *tp)
{
}
static void
-copy_bind_expr (tree *tp, int *walk_subtrees, inline_data *id)
+copy_bind_expr (tree *tp, int *walk_subtrees, copy_body_data *id)
{
tree block = BIND_EXPR_BLOCK (*tp);
/* Copy (and replace) the statement. */
BIND_EXPR_VARS (*tp) = remap_decls (BIND_EXPR_VARS (*tp), id);
}
-/* Called from copy_body via walk_tree. DATA is really an `inline_data *'. */
+/* Called from copy_body_id via walk_tree. DATA is really an
+ `copy_body_data *'. */
-static tree
+tree
copy_body_r (tree *tp, int *walk_subtrees, void *data)
{
- inline_data *id = (inline_data *) data;
- tree fn = VARRAY_TOP_TREE (id->fns);
-
-#if 0
- /* All automatic variables should have a DECL_CONTEXT indicating
- what function they come from. */
- if ((TREE_CODE (*tp) == VAR_DECL || TREE_CODE (*tp) == LABEL_DECL)
- && DECL_NAMESPACE_SCOPE_P (*tp))
- gcc_assert (DECL_EXTERNAL (*tp) || TREE_STATIC (*tp));
-#endif
+ copy_body_data *id = (copy_body_data *) data;
+ tree fn = id->src_fn;
+ tree new_block;
- /* If this is a RETURN_EXPR, change it into a MODIFY_EXPR and a
- GOTO_EXPR with the RET_LABEL as its target. */
- if (TREE_CODE (*tp) == RETURN_EXPR && id->ret_label)
- {
- tree return_stmt = *tp;
- tree goto_stmt;
+ /* Begin by recognizing trees that we'll completely rewrite for the
+ inlining context. Our output for these trees is completely
+ different from out input (e.g. RETURN_EXPR is deleted, and morphs
+ into an edge). Further down, we'll handle trees that get
+ duplicated and/or tweaked. */
- /* Build the GOTO_EXPR. */
- tree assignment = TREE_OPERAND (return_stmt, 0);
- goto_stmt = build1 (GOTO_EXPR, void_type_node, id->ret_label);
- TREE_USED (id->ret_label) = 1;
+ /* When requested, RETURN_EXPRs should be transformed to just the
+ contained GIMPLE_MODIFY_STMT. The branch semantics of the return will
+ be handled elsewhere by manipulating the CFG rather than a statement. */
+ if (TREE_CODE (*tp) == RETURN_EXPR && id->transform_return_to_modify)
+ {
+ tree assignment = TREE_OPERAND (*tp, 0);
/* If we're returning something, just turn that into an
- assignment into the equivalent of the original
- RESULT_DECL. */
- if (assignment)
- {
- /* Do not create a statement containing a naked RESULT_DECL. */
- if (TREE_CODE (assignment) == RESULT_DECL)
- gimplify_stmt (&assignment);
-
- *tp = build (BIND_EXPR, void_type_node, NULL, NULL, NULL);
- append_to_statement_list (assignment, &BIND_EXPR_BODY (*tp));
- append_to_statement_list (goto_stmt, &BIND_EXPR_BODY (*tp));
- }
- /* If we're not returning anything just do the jump. */
- else
- *tp = goto_stmt;
+ assignment into the equivalent of the original RESULT_DECL.
+ If the "assignment" is just the result decl, the result
+ decl has already been set (e.g. a recent "foo (&result_decl,
+ ...)"); just toss the entire RETURN_EXPR. */
+ if (assignment && TREE_CODE (assignment) == GIMPLE_MODIFY_STMT)
+ {
+ /* Replace the RETURN_EXPR with (a copy of) the
+ GIMPLE_MODIFY_STMT hanging underneath. */
+ *tp = copy_node (assignment);
+ }
+ else /* Else the RETURN_EXPR returns no value. */
+ {
+ *tp = NULL;
+ return (tree) (void *)1;
+ }
+ }
+ else if (TREE_CODE (*tp) == SSA_NAME)
+ {
+ *tp = remap_ssa_name (*tp, id);
+ *walk_subtrees = 0;
+ return NULL;
}
+
/* Local variables and labels need to be replaced by equivalent
variables. We don't want to copy static variables; there's only
one of those, no matter how many times we inline the containing
function. Similarly for globals from an outer function. */
- else if (lang_hooks.tree_inlining.auto_var_in_fn_p (*tp, fn))
+ else if (auto_var_in_fn_p (*tp, fn))
{
tree new_decl;
/* Replace this variable with the copy. */
STRIP_TYPE_NOPS (new_decl);
*tp = new_decl;
+ *walk_subtrees = 0;
}
else if (TREE_CODE (*tp) == STATEMENT_LIST)
copy_statement_list (tp);
else if (TREE_CODE (*tp) == SAVE_EXPR)
remap_save_expr (tp, id->decl_map, walk_subtrees);
+ else if (TREE_CODE (*tp) == LABEL_DECL
+ && (! DECL_CONTEXT (*tp)
+ || decl_function_context (*tp) == id->src_fn))
+ /* These may need to be remapped for EH handling. */
+ *tp = remap_decl (*tp, id);
else if (TREE_CODE (*tp) == BIND_EXPR)
copy_bind_expr (tp, walk_subtrees, id);
/* Types may need remapping as well. */
/* If this is a constant, we have to copy the node iff the type will be
remapped. copy_tree_r will not copy a constant. */
- else if (TREE_CODE_CLASS (TREE_CODE (*tp)) == tcc_constant)
+ else if (CONSTANT_CLASS_P (*tp))
{
tree new_type = remap_type (TREE_TYPE (*tp), id);
knows not to copy VAR_DECLs, etc., so this is safe. */
else
{
- tree old_node = *tp;
-
- if (TREE_CODE (*tp) == MODIFY_EXPR
- && TREE_OPERAND (*tp, 0) == TREE_OPERAND (*tp, 1)
- && (lang_hooks.tree_inlining.auto_var_in_fn_p
- (TREE_OPERAND (*tp, 0), fn)))
+ /* Here we handle trees that are not completely rewritten.
+ First we detect some inlining-induced bogosities for
+ discarding. */
+ if (TREE_CODE (*tp) == GIMPLE_MODIFY_STMT
+ && GIMPLE_STMT_OPERAND (*tp, 0) == GIMPLE_STMT_OPERAND (*tp, 1)
+ && (auto_var_in_fn_p (GIMPLE_STMT_OPERAND (*tp, 0), fn)))
{
/* Some assignments VAR = VAR; don't generate any rtl code
and thus don't count as variable modification. Avoid
keeping bogosities like 0 = 0. */
- tree decl = TREE_OPERAND (*tp, 0), value;
- splay_tree_node n;
+ tree decl = GIMPLE_STMT_OPERAND (*tp, 0), value;
+ tree *n;
- n = splay_tree_lookup (id->decl_map, (splay_tree_key) decl);
+ n = (tree *) pointer_map_contains (id->decl_map, decl);
if (n)
{
- value = (tree) n->value;
+ value = *n;
STRIP_TYPE_NOPS (value);
- if (TREE_CONSTANT (value) || TREE_READONLY_DECL_P (value))
+ if (TREE_CONSTANT (value) || TREE_READONLY (value))
{
*tp = build_empty_stmt ();
return copy_body_r (tp, walk_subtrees, data);
{
/* Get rid of *& from inline substitutions that can happen when a
pointer argument is an ADDR_EXPR. */
- tree decl = TREE_OPERAND (*tp, 0), value;
- splay_tree_node n;
+ tree decl = TREE_OPERAND (*tp, 0);
+ tree *n;
- n = splay_tree_lookup (id->decl_map, (splay_tree_key) decl);
+ n = (tree *) pointer_map_contains (id->decl_map, decl);
if (n)
{
- value = (tree) n->value;
- STRIP_NOPS (value);
- if (TREE_CODE (value) == ADDR_EXPR
- && (lang_hooks.types_compatible_p
- (TREE_TYPE (*tp), TREE_TYPE (TREE_OPERAND (value, 0)))))
- {
- *tp = TREE_OPERAND (value, 0);
- return copy_body_r (tp, walk_subtrees, data);
+ tree new;
+ tree old;
+ /* If we happen to get an ADDR_EXPR in n->value, strip
+ it manually here as we'll eventually get ADDR_EXPRs
+ which lie about their types pointed to. In this case
+ build_fold_indirect_ref wouldn't strip the INDIRECT_REF,
+ but we absolutely rely on that. As fold_indirect_ref
+ does other useful transformations, try that first, though. */
+ tree type = TREE_TYPE (TREE_TYPE (*n));
+ new = unshare_expr (*n);
+ old = *tp;
+ *tp = gimple_fold_indirect_ref (new);
+ if (! *tp)
+ {
+ if (TREE_CODE (new) == ADDR_EXPR)
+ {
+ *tp = fold_indirect_ref_1 (type, new);
+ /* ??? We should either assert here or build
+ a VIEW_CONVERT_EXPR instead of blindly leaking
+ incompatible types to our IL. */
+ if (! *tp)
+ *tp = TREE_OPERAND (new, 0);
+ }
+ else
+ {
+ *tp = build1 (INDIRECT_REF, type, new);
+ TREE_THIS_VOLATILE (*tp) = TREE_THIS_VOLATILE (old);
+ }
}
+ *walk_subtrees = 0;
+ return NULL;
}
}
+ /* Here is the "usual case". Copy this tree node, and then
+ tweak some special cases. */
copy_tree_r (tp, walk_subtrees, NULL);
- if (TREE_CODE (*tp) == CALL_EXPR && id->node && get_callee_fndecl (*tp))
+ /* Global variables we haven't seen yet needs to go into referenced
+ vars. If not referenced from types only. */
+ if (gimple_in_ssa_p (cfun) && TREE_CODE (*tp) == VAR_DECL
+ && id->remapping_type_depth == 0)
+ add_referenced_var (*tp);
+
+ /* If EXPR has block defined, map it to newly constructed block.
+ When inlining we want EXPRs without block appear in the block
+ of function call. */
+ if (EXPR_P (*tp) || GIMPLE_STMT_P (*tp))
{
- if (id->saving_p)
- {
- struct cgraph_node *node;
- struct cgraph_edge *edge;
-
- for (node = id->node->next_clone; node; node = node->next_clone)
- {
- edge = cgraph_edge (node, old_node);
- gcc_assert (edge);
- edge->call_expr = *tp;
- }
- }
- else
+ new_block = id->block;
+ if (TREE_BLOCK (*tp))
{
- struct cgraph_edge *edge
- = cgraph_edge (id->current_node, old_node);
-
- if (edge)
- cgraph_clone_edge (edge, id->node, *tp);
+ tree *n;
+ n = (tree *) pointer_map_contains (id->decl_map,
+ TREE_BLOCK (*tp));
+ gcc_assert (n);
+ new_block = *n;
}
+ TREE_BLOCK (*tp) = new_block;
}
- TREE_TYPE (*tp) = remap_type (TREE_TYPE (*tp), id);
+ if (TREE_CODE (*tp) == RESX_EXPR && id->eh_region_offset)
+ TREE_OPERAND (*tp, 0) =
+ build_int_cst
+ (NULL_TREE,
+ id->eh_region_offset + TREE_INT_CST_LOW (TREE_OPERAND (*tp, 0)));
+
+ if (!GIMPLE_TUPLE_P (*tp) && TREE_CODE (*tp) != OMP_CLAUSE)
+ TREE_TYPE (*tp) = remap_type (TREE_TYPE (*tp), id);
/* The copied TARGET_EXPR has never been expanded, even if the
original node was expanded already. */
and friends are up-to-date. */
else if (TREE_CODE (*tp) == ADDR_EXPR)
{
+ int invariant = is_gimple_min_invariant (*tp);
walk_tree (&TREE_OPERAND (*tp, 0), copy_body_r, id, NULL);
- recompute_tree_invarant_for_addr_expr (*tp);
+ /* Handle the case where we substituted an INDIRECT_REF
+ into the operand of the ADDR_EXPR. */
+ if (TREE_CODE (TREE_OPERAND (*tp, 0)) == INDIRECT_REF)
+ *tp = TREE_OPERAND (TREE_OPERAND (*tp, 0), 0);
+ else
+ recompute_tree_invariant_for_addr_expr (*tp);
+ /* If this used to be invariant, but is not any longer,
+ then regimplification is probably needed. */
+ if (invariant && !is_gimple_min_invariant (*tp))
+ id->regimplify = true;
*walk_subtrees = 0;
}
}
return NULL_TREE;
}
-/* Make a copy of the body of FN so that it can be inserted inline in
- another function. */
+/* Copy basic block, scale profile accordingly. Edges will be taken care of
+ later */
-static tree
-copy_body (inline_data *id)
+static basic_block
+copy_bb (copy_body_data *id, basic_block bb, int frequency_scale, int count_scale)
{
- tree body;
- tree fndecl = VARRAY_TOP_TREE (id->fns);
+ block_stmt_iterator bsi, copy_bsi;
+ basic_block copy_basic_block;
+
+ /* create_basic_block() will append every new block to
+ basic_block_info automatically. */
+ copy_basic_block = create_basic_block (NULL, (void *) 0,
+ (basic_block) bb->prev_bb->aux);
+ copy_basic_block->count = bb->count * count_scale / REG_BR_PROB_BASE;
+
+ /* We are going to rebuild frequencies from scratch. These values have just
+ small importance to drive canonicalize_loop_headers. */
+ copy_basic_block->frequency = ((gcov_type)bb->frequency
+ * frequency_scale / REG_BR_PROB_BASE);
+ if (copy_basic_block->frequency > BB_FREQ_MAX)
+ copy_basic_block->frequency = BB_FREQ_MAX;
+ copy_bsi = bsi_start (copy_basic_block);
+
+ for (bsi = bsi_start (bb);
+ !bsi_end_p (bsi); bsi_next (&bsi))
+ {
+ tree stmt = bsi_stmt (bsi);
+ tree orig_stmt = stmt;
- if (fndecl == current_function_decl
- && cfun->saved_tree)
- body = cfun->saved_tree;
- else
- body = DECL_SAVED_TREE (fndecl);
- walk_tree (&body, copy_body_r, id, NULL);
+ id->regimplify = false;
+ walk_tree (&stmt, copy_body_r, id, NULL);
- return body;
-}
+ /* RETURN_EXPR might be removed,
+ this is signalled by making stmt pointer NULL. */
+ if (stmt)
+ {
+ tree call, decl;
-/* Return true if VALUE is an ADDR_EXPR of an automatic variable
- defined in function FN, or of a data member thereof. */
+ gimple_duplicate_stmt_histograms (cfun, stmt, id->src_cfun, orig_stmt);
-static bool
-self_inlining_addr_expr (tree value, tree fn)
-{
- tree var;
+ /* With return slot optimization we can end up with
+ non-gimple (foo *)&this->m, fix that here. */
+ if ((TREE_CODE (stmt) == GIMPLE_MODIFY_STMT
+ && TREE_CODE (GIMPLE_STMT_OPERAND (stmt, 1)) == NOP_EXPR
+ && !is_gimple_val (TREE_OPERAND (GIMPLE_STMT_OPERAND (stmt, 1), 0)))
+ || id->regimplify)
+ gimplify_stmt (&stmt);
- if (TREE_CODE (value) != ADDR_EXPR)
- return false;
+ bsi_insert_after (©_bsi, stmt, BSI_NEW_STMT);
- var = get_base_address (TREE_OPERAND (value, 0));
-
- return var && lang_hooks.tree_inlining.auto_var_in_fn_p (var, fn);
-}
+ /* Process new statement. gimplify_stmt possibly turned statement
+ into multiple statements, we need to process all of them. */
+ while (!bsi_end_p (copy_bsi))
+ {
+ tree *stmtp = bsi_stmt_ptr (copy_bsi);
+ tree stmt = *stmtp;
+ call = get_call_expr_in (stmt);
-static void
-setup_one_parameter (inline_data *id, tree p, tree value, tree fn,
- tree *init_stmts, tree *vars, bool *gimplify_init_stmts_p)
-{
- tree init_stmt;
- tree var;
+ if (call && CALL_EXPR_VA_ARG_PACK (call) && id->call_expr)
+ {
+ /* __builtin_va_arg_pack () should be replaced by
+ all arguments corresponding to ... in the caller. */
+ tree p, *argarray, new_call, *call_ptr;
+ int nargs = call_expr_nargs (id->call_expr);
+
+ for (p = DECL_ARGUMENTS (id->src_fn); p; p = TREE_CHAIN (p))
+ nargs--;
+
+ argarray = (tree *) alloca ((nargs + call_expr_nargs (call))
+ * sizeof (tree));
+
+ memcpy (argarray, CALL_EXPR_ARGP (call),
+ call_expr_nargs (call) * sizeof (*argarray));
+ memcpy (argarray + call_expr_nargs (call),
+ CALL_EXPR_ARGP (id->call_expr)
+ + (call_expr_nargs (id->call_expr) - nargs),
+ nargs * sizeof (*argarray));
+
+ new_call = build_call_array (TREE_TYPE (call),
+ CALL_EXPR_FN (call),
+ nargs + call_expr_nargs (call),
+ argarray);
+ /* Copy all CALL_EXPR flags, locus and block, except
+ CALL_EXPR_VA_ARG_PACK flag. */
+ CALL_EXPR_STATIC_CHAIN (new_call)
+ = CALL_EXPR_STATIC_CHAIN (call);
+ CALL_EXPR_TAILCALL (new_call) = CALL_EXPR_TAILCALL (call);
+ CALL_EXPR_RETURN_SLOT_OPT (new_call)
+ = CALL_EXPR_RETURN_SLOT_OPT (call);
+ CALL_FROM_THUNK_P (new_call) = CALL_FROM_THUNK_P (call);
+ CALL_CANNOT_INLINE_P (new_call)
+ = CALL_CANNOT_INLINE_P (call);
+ TREE_NOTHROW (new_call) = TREE_NOTHROW (call);
+ SET_EXPR_LOCUS (new_call, EXPR_LOCUS (call));
+ TREE_BLOCK (new_call) = TREE_BLOCK (call);
+
+ call_ptr = stmtp;
+ if (TREE_CODE (*call_ptr) == GIMPLE_MODIFY_STMT)
+ call_ptr = &GIMPLE_STMT_OPERAND (*call_ptr, 1);
+ if (TREE_CODE (*call_ptr) == WITH_SIZE_EXPR)
+ call_ptr = &TREE_OPERAND (*call_ptr, 0);
+ gcc_assert (*call_ptr == call);
+ if (call_ptr == stmtp)
+ {
+ bsi_replace (©_bsi, new_call, true);
+ stmtp = bsi_stmt_ptr (copy_bsi);
+ stmt = *stmtp;
+ }
+ else
+ {
+ *call_ptr = new_call;
+ stmt = *stmtp;
+ update_stmt (stmt);
+ }
+ }
+ else if (call
+ && id->call_expr
+ && (decl = get_callee_fndecl (call))
+ && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL
+ && DECL_FUNCTION_CODE (decl)
+ == BUILT_IN_VA_ARG_PACK_LEN)
+ {
+ /* __builtin_va_arg_pack_len () should be replaced by
+ the number of anonymous arguments. */
+ int nargs = call_expr_nargs (id->call_expr);
+ tree count, *call_ptr, p;
+
+ for (p = DECL_ARGUMENTS (id->src_fn); p; p = TREE_CHAIN (p))
+ nargs--;
+
+ count = build_int_cst (integer_type_node, nargs);
+ call_ptr = stmtp;
+ if (TREE_CODE (*call_ptr) == GIMPLE_MODIFY_STMT)
+ call_ptr = &GIMPLE_STMT_OPERAND (*call_ptr, 1);
+ if (TREE_CODE (*call_ptr) == WITH_SIZE_EXPR)
+ call_ptr = &TREE_OPERAND (*call_ptr, 0);
+ gcc_assert (*call_ptr == call && call_ptr != stmtp);
+ *call_ptr = count;
+ stmt = *stmtp;
+ update_stmt (stmt);
+ call = NULL_TREE;
+ }
- /* If the parameter is never assigned to, we may not need to
- create a new variable here at all. Instead, we may be able
- to just use the argument value. */
- if (TREE_READONLY (p)
- && !TREE_ADDRESSABLE (p)
- && value && !TREE_SIDE_EFFECTS (value))
- {
- /* We can't risk substituting complex expressions. They
- might contain variables that will be assigned to later.
- Theoretically, we could check the expression to see if
- all of the variables that determine its value are
- read-only, but we don't bother. */
- /* We may produce non-gimple trees by adding NOPs or introduce
- invalid sharing when operand is not really constant.
- It is not big deal to prohibit constant propagation here as
- we will constant propagate in DOM1 pass anyway. */
- if (is_gimple_min_invariant (value)
- && lang_hooks.types_compatible_p (TREE_TYPE (value), TREE_TYPE (p))
- /* We have to be very careful about ADDR_EXPR. Make sure
- the base variable isn't a local variable of the inlined
- function, e.g., when doing recursive inlining, direct or
- mutually-recursive or whatever, which is why we don't
- just test whether fn == current_function_decl. */
- && ! self_inlining_addr_expr (value, fn))
- {
- insert_decl_map (id, p, value);
- return;
+ /* Statements produced by inlining can be unfolded, especially
+ when we constant propagated some operands. We can't fold
+ them right now for two reasons:
+ 1) folding require SSA_NAME_DEF_STMTs to be correct
+ 2) we can't change function calls to builtins.
+ So we just mark statement for later folding. We mark
+ all new statements, instead just statements that has changed
+ by some nontrivial substitution so even statements made
+ foldable indirectly are updated. If this turns out to be
+ expensive, copy_body can be told to watch for nontrivial
+ changes. */
+ if (id->statements_to_fold)
+ pointer_set_insert (id->statements_to_fold, stmt);
+ /* We're duplicating a CALL_EXPR. Find any corresponding
+ callgraph edges and update or duplicate them. */
+ if (call && (decl = get_callee_fndecl (call)))
+ {
+ struct cgraph_node *node;
+ struct cgraph_edge *edge;
+
+ switch (id->transform_call_graph_edges)
+ {
+ case CB_CGE_DUPLICATE:
+ edge = cgraph_edge (id->src_node, orig_stmt);
+ if (edge)
+ cgraph_clone_edge (edge, id->dst_node, stmt,
+ REG_BR_PROB_BASE, 1, edge->frequency, true);
+ break;
+
+ case CB_CGE_MOVE_CLONES:
+ for (node = id->dst_node->next_clone;
+ node;
+ node = node->next_clone)
+ {
+ edge = cgraph_edge (node, orig_stmt);
+ gcc_assert (edge);
+ cgraph_set_call_stmt (edge, stmt);
+ }
+ /* FALLTHRU */
+
+ case CB_CGE_MOVE:
+ edge = cgraph_edge (id->dst_node, orig_stmt);
+ if (edge)
+ cgraph_set_call_stmt (edge, stmt);
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+ }
+ /* If you think we can abort here, you are wrong.
+ There is no region 0 in tree land. */
+ gcc_assert (lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt)
+ != 0);
+
+ if (tree_could_throw_p (stmt)
+ /* When we are cloning for inlining, we are supposed to
+ construct a clone that calls precisely the same functions
+ as original. However IPA optimizers might've proved
+ earlier some function calls as non-trapping that might
+ render some basic blocks dead that might become
+ unreachable.
+
+ We can't update SSA with unreachable blocks in CFG and thus
+ we prevent the scenario by preserving even the "dead" eh
+ edges until the point they are later removed by
+ fixup_cfg pass. */
+ || (id->transform_call_graph_edges == CB_CGE_MOVE_CLONES
+ && lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt) > 0))
+ {
+ int region = lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt);
+ /* Add an entry for the copied tree in the EH hashtable.
+ When cloning or versioning, use the hashtable in
+ cfun, and just copy the EH number. When inlining, use the
+ hashtable in the caller, and adjust the region number. */
+ if (region > 0)
+ add_stmt_to_eh_region (stmt, region + id->eh_region_offset);
+
+ /* If this tree doesn't have a region associated with it,
+ and there is a "current region,"
+ then associate this tree with the current region
+ and add edges associated with this region. */
+ if ((lookup_stmt_eh_region_fn (id->src_cfun,
+ orig_stmt) <= 0
+ && id->eh_region > 0)
+ && tree_could_throw_p (stmt))
+ add_stmt_to_eh_region (stmt, id->eh_region);
+ }
+ if (gimple_in_ssa_p (cfun))
+ {
+ ssa_op_iter i;
+ tree def;
+
+ find_new_referenced_vars (bsi_stmt_ptr (copy_bsi));
+ FOR_EACH_SSA_TREE_OPERAND (def, stmt, i, SSA_OP_DEF)
+ if (TREE_CODE (def) == SSA_NAME)
+ SSA_NAME_DEF_STMT (def) = stmt;
+ }
+ bsi_next (©_bsi);
+ }
+ copy_bsi = bsi_last (copy_basic_block);
}
}
+ return copy_basic_block;
+}
- /* Make an equivalent VAR_DECL. Note that we must NOT remap the type
- here since the type of this decl must be visible to the calling
- function. */
- var = copy_decl_for_inlining (p, fn, VARRAY_TREE (id->fns, 0));
+/* Inserting Single Entry Multiple Exit region in SSA form into code in SSA
+ form is quite easy, since dominator relationship for old basic blocks does
+ not change.
- /* Register the VAR_DECL as the equivalent for the PARM_DECL;
- that way, when the PARM_DECL is encountered, it will be
- automatically replaced by the VAR_DECL. */
- insert_decl_map (id, p, var);
+ There is however exception where inlining might change dominator relation
+ across EH edges from basic block within inlined functions destinating
+ to landing pads in function we inline into.
- /* Declare this new variable. */
- TREE_CHAIN (var) = *vars;
- *vars = var;
+ The function fills in PHI_RESULTs of such PHI nodes if they refer
+ to gimple regs. Otherwise, the function mark PHI_RESULT of such
+ PHI nodes for renaming. For non-gimple regs, renaming is safe: the
+ EH edges are abnormal and SSA_NAME_OCCURS_IN_ABNORMAL_PHI must be
+ set, and this means that there will be no overlapping live ranges
+ for the underlying symbol.
- /* Make gimplifier happy about this variable. */
- DECL_SEEN_IN_BIND_EXPR_P (var) = 1;
+ This might change in future if we allow redirecting of EH edges and
+ we might want to change way build CFG pre-inlining to include
+ all the possible edges then. */
+static void
+update_ssa_across_abnormal_edges (basic_block bb, basic_block ret_bb,
+ bool can_throw, bool nonlocal_goto)
+{
+ edge e;
+ edge_iterator ei;
- /* Even if P was TREE_READONLY, the new VAR should not be.
- In the original code, we would have constructed a
- temporary, and then the function body would have never
- changed the value of P. However, now, we will be
- constructing VAR directly. The constructor body may
- change its value multiple times as it is being
- constructed. Therefore, it must not be TREE_READONLY;
- the back-end assumes that TREE_READONLY variable is
- assigned to only once. */
- if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (p)))
- TREE_READONLY (var) = 0;
+ FOR_EACH_EDGE (e, ei, bb->succs)
+ if (!e->dest->aux
+ || ((basic_block)e->dest->aux)->index == ENTRY_BLOCK)
+ {
+ tree phi;
+
+ gcc_assert (e->flags & EDGE_ABNORMAL);
+ if (!nonlocal_goto)
+ gcc_assert (e->flags & EDGE_EH);
+ if (!can_throw)
+ gcc_assert (!(e->flags & EDGE_EH));
+ for (phi = phi_nodes (e->dest); phi; phi = PHI_CHAIN (phi))
+ {
+ edge re;
- /* Initialize this VAR_DECL from the equivalent argument. Convert
- the argument to the proper type in case it was promoted. */
- if (value)
- {
- tree rhs = fold_convert (TREE_TYPE (var), value);
+ /* There shouldn't be any PHI nodes in the ENTRY_BLOCK. */
+ gcc_assert (!e->dest->aux);
- if (rhs == error_mark_node)
- return;
+ gcc_assert (SSA_NAME_OCCURS_IN_ABNORMAL_PHI
+ (PHI_RESULT (phi)));
- /* We want to use MODIFY_EXPR, not INIT_EXPR here so that we
- keep our trees in gimple form. */
- init_stmt = build (MODIFY_EXPR, TREE_TYPE (var), var, rhs);
- append_to_statement_list (init_stmt, init_stmts);
+ if (!is_gimple_reg (PHI_RESULT (phi)))
+ {
+ mark_sym_for_renaming
+ (SSA_NAME_VAR (PHI_RESULT (phi)));
+ continue;
+ }
- /* If we did not create a gimple value and we did not create a gimple
- cast of a gimple value, then we will need to gimplify INIT_STMTS
- at the end. Note that is_gimple_cast only checks the outer
- tree code, not its operand. Thus the explicit check that it's
- operand is a gimple value. */
- if (!is_gimple_val (rhs)
- && (!is_gimple_cast (rhs)
- || !is_gimple_val (TREE_OPERAND (rhs, 0))))
- *gimplify_init_stmts_p = true;
- }
-}
+ re = find_edge (ret_bb, e->dest);
+ gcc_assert (re);
+ gcc_assert ((re->flags & (EDGE_EH | EDGE_ABNORMAL))
+ == (e->flags & (EDGE_EH | EDGE_ABNORMAL)));
-/* Generate code to initialize the parameters of the function at the
- top of the stack in ID from the ARGS (presented as a TREE_LIST). */
+ SET_USE (PHI_ARG_DEF_PTR_FROM_EDGE (phi, e),
+ USE_FROM_PTR (PHI_ARG_DEF_PTR_FROM_EDGE (phi, re)));
+ }
+ }
+}
-static tree
-initialize_inlined_parameters (inline_data *id, tree args, tree static_chain,
- tree fn, tree bind_expr)
+/* Copy edges from BB into its copy constructed earlier, scale profile
+ accordingly. Edges will be taken care of later. Assume aux
+ pointers to point to the copies of each BB. */
+static void
+copy_edges_for_bb (basic_block bb, int count_scale, basic_block ret_bb)
{
- tree init_stmts = NULL_TREE;
- tree parms;
- tree a;
- tree p;
- tree vars = NULL_TREE;
- bool gimplify_init_stmts_p = false;
- int argnum = 0;
+ basic_block new_bb = (basic_block) bb->aux;
+ edge_iterator ei;
+ edge old_edge;
+ block_stmt_iterator bsi;
+ int flags;
+
+ /* Use the indices from the original blocks to create edges for the
+ new ones. */
+ FOR_EACH_EDGE (old_edge, ei, bb->succs)
+ if (!(old_edge->flags & EDGE_EH))
+ {
+ edge new;
- /* Figure out what the parameters are. */
- parms = DECL_ARGUMENTS (fn);
- if (fn == current_function_decl)
- parms = cfun->saved_args;
+ flags = old_edge->flags;
- /* Loop through the parameter declarations, replacing each with an
- equivalent VAR_DECL, appropriately initialized. */
- for (p = parms, a = args; p;
- a = a ? TREE_CHAIN (a) : a, p = TREE_CHAIN (p))
+ /* Return edges do get a FALLTHRU flag when the get inlined. */
+ if (old_edge->dest->index == EXIT_BLOCK && !old_edge->flags
+ && old_edge->dest->aux != EXIT_BLOCK_PTR)
+ flags |= EDGE_FALLTHRU;
+ new = make_edge (new_bb, (basic_block) old_edge->dest->aux, flags);
+ new->count = old_edge->count * count_scale / REG_BR_PROB_BASE;
+ new->probability = old_edge->probability;
+ }
+
+ if (bb->index == ENTRY_BLOCK || bb->index == EXIT_BLOCK)
+ return;
+
+ for (bsi = bsi_start (new_bb); !bsi_end_p (bsi);)
{
- tree value;
+ tree copy_stmt;
+ bool can_throw, nonlocal_goto;
+
+ copy_stmt = bsi_stmt (bsi);
+ update_stmt (copy_stmt);
+ if (gimple_in_ssa_p (cfun))
+ mark_symbols_for_renaming (copy_stmt);
+ /* Do this before the possible split_block. */
+ bsi_next (&bsi);
+
+ /* If this tree could throw an exception, there are two
+ cases where we need to add abnormal edge(s): the
+ tree wasn't in a region and there is a "current
+ region" in the caller; or the original tree had
+ EH edges. In both cases split the block after the tree,
+ and add abnormal edge(s) as needed; we need both
+ those from the callee and the caller.
+ We check whether the copy can throw, because the const
+ propagation can change an INDIRECT_REF which throws
+ into a COMPONENT_REF which doesn't. If the copy
+ can throw, the original could also throw. */
+
+ can_throw = tree_can_throw_internal (copy_stmt);
+ nonlocal_goto = tree_can_make_abnormal_goto (copy_stmt);
+
+ if (can_throw || nonlocal_goto)
+ {
+ if (!bsi_end_p (bsi))
+ /* Note that bb's predecessor edges aren't necessarily
+ right at this point; split_block doesn't care. */
+ {
+ edge e = split_block (new_bb, copy_stmt);
- ++argnum;
+ new_bb = e->dest;
+ new_bb->aux = e->src->aux;
+ bsi = bsi_start (new_bb);
+ }
+ }
- /* Find the initializer. */
- value = lang_hooks.tree_inlining.convert_parm_for_inlining
- (p, a ? TREE_VALUE (a) : NULL_TREE, fn, argnum);
+ if (can_throw)
+ make_eh_edges (copy_stmt);
- setup_one_parameter (id, p, value, fn, &init_stmts, &vars,
- &gimplify_init_stmts_p);
- }
+ if (nonlocal_goto)
+ make_abnormal_goto_edges (bb_for_stmt (copy_stmt), true);
- /* Evaluate trailing arguments. */
- for (; a; a = TREE_CHAIN (a))
+ if ((can_throw || nonlocal_goto)
+ && gimple_in_ssa_p (cfun))
+ update_ssa_across_abnormal_edges (bb_for_stmt (copy_stmt), ret_bb,
+ can_throw, nonlocal_goto);
+ }
+}
+
+/* Copy the PHIs. All blocks and edges are copied, some blocks
+ was possibly split and new outgoing EH edges inserted.
+ BB points to the block of original function and AUX pointers links
+ the original and newly copied blocks. */
+
+static void
+copy_phis_for_bb (basic_block bb, copy_body_data *id)
+{
+ basic_block new_bb = bb->aux;
+ edge_iterator ei;
+ tree phi;
+
+ for (phi = phi_nodes (bb); phi; phi = PHI_CHAIN (phi))
+ {
+ tree res = PHI_RESULT (phi);
+ tree new_res = res;
+ tree new_phi;
+ edge new_edge;
+
+ if (is_gimple_reg (res))
+ {
+ walk_tree (&new_res, copy_body_r, id, NULL);
+ SSA_NAME_DEF_STMT (new_res)
+ = new_phi = create_phi_node (new_res, new_bb);
+ FOR_EACH_EDGE (new_edge, ei, new_bb->preds)
+ {
+ edge old_edge = find_edge (new_edge->src->aux, bb);
+ tree arg = PHI_ARG_DEF_FROM_EDGE (phi, old_edge);
+ tree new_arg = arg;
+
+ walk_tree (&new_arg, copy_body_r, id, NULL);
+ gcc_assert (new_arg);
+ /* With return slot optimization we can end up with
+ non-gimple (foo *)&this->m, fix that here. */
+ if (TREE_CODE (new_arg) != SSA_NAME
+ && TREE_CODE (new_arg) != FUNCTION_DECL
+ && !is_gimple_val (new_arg))
+ {
+ tree stmts = NULL_TREE;
+ new_arg = force_gimple_operand (new_arg, &stmts,
+ true, NULL);
+ bsi_insert_on_edge_immediate (new_edge, stmts);
+ }
+ add_phi_arg (new_phi, new_arg, new_edge);
+ }
+ }
+ }
+}
+
+/* Wrapper for remap_decl so it can be used as a callback. */
+static tree
+remap_decl_1 (tree decl, void *data)
+{
+ return remap_decl (decl, (copy_body_data *) data);
+}
+
+/* Build struct function and associated datastructures for the new clone
+ NEW_FNDECL to be build. CALLEE_FNDECL is the original */
+
+static void
+initialize_cfun (tree new_fndecl, tree callee_fndecl, gcov_type count,
+ int frequency)
+{
+ struct function *new_cfun
+ = (struct function *) ggc_alloc_cleared (sizeof (struct function));
+ struct function *src_cfun = DECL_STRUCT_FUNCTION (callee_fndecl);
+ int count_scale, frequency_scale;
+
+ if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count)
+ count_scale = (REG_BR_PROB_BASE * count
+ / ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count);
+ else
+ count_scale = 1;
+
+ if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency)
+ frequency_scale = (REG_BR_PROB_BASE * frequency
+ /
+ ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency);
+ else
+ frequency_scale = count_scale;
+
+ /* Register specific tree functions. */
+ tree_register_cfg_hooks ();
+ *new_cfun = *DECL_STRUCT_FUNCTION (callee_fndecl);
+ new_cfun->funcdef_no = get_next_funcdef_no ();
+ VALUE_HISTOGRAMS (new_cfun) = NULL;
+ new_cfun->local_decls = NULL;
+ new_cfun->cfg = NULL;
+ new_cfun->decl = new_fndecl /*= copy_node (callee_fndecl)*/;
+ DECL_STRUCT_FUNCTION (new_fndecl) = new_cfun;
+ push_cfun (new_cfun);
+ init_empty_tree_cfg ();
+
+ ENTRY_BLOCK_PTR->count =
+ (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count * count_scale /
+ REG_BR_PROB_BASE);
+ ENTRY_BLOCK_PTR->frequency =
+ (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency *
+ frequency_scale / REG_BR_PROB_BASE);
+ EXIT_BLOCK_PTR->count =
+ (EXIT_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count * count_scale /
+ REG_BR_PROB_BASE);
+ EXIT_BLOCK_PTR->frequency =
+ (EXIT_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency *
+ frequency_scale / REG_BR_PROB_BASE);
+ if (src_cfun->eh)
+ init_eh_for_function ();
+
+ if (src_cfun->gimple_df)
+ {
+ init_tree_ssa (cfun);
+ cfun->gimple_df->in_ssa_p = true;
+ init_ssa_operands ();
+ }
+ pop_cfun ();
+}
+
+/* Make a copy of the body of FN so that it can be inserted inline in
+ another function. Walks FN via CFG, returns new fndecl. */
+
+static tree
+copy_cfg_body (copy_body_data * id, gcov_type count, int frequency,
+ basic_block entry_block_map, basic_block exit_block_map)
+{
+ tree callee_fndecl = id->src_fn;
+ /* Original cfun for the callee, doesn't change. */
+ struct function *src_cfun = DECL_STRUCT_FUNCTION (callee_fndecl);
+ struct function *cfun_to_copy;
+ basic_block bb;
+ tree new_fndecl = NULL;
+ int count_scale, frequency_scale;
+ int last;
+
+ if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count)
+ count_scale = (REG_BR_PROB_BASE * count
+ / ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count);
+ else
+ count_scale = 1;
+
+ if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency)
+ frequency_scale = (REG_BR_PROB_BASE * frequency
+ /
+ ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency);
+ else
+ frequency_scale = count_scale;
+
+ /* Register specific tree functions. */
+ tree_register_cfg_hooks ();
+
+ /* Must have a CFG here at this point. */
+ gcc_assert (ENTRY_BLOCK_PTR_FOR_FUNCTION
+ (DECL_STRUCT_FUNCTION (callee_fndecl)));
+
+ cfun_to_copy = id->src_cfun = DECL_STRUCT_FUNCTION (callee_fndecl);
+
+
+ ENTRY_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy)->aux = entry_block_map;
+ EXIT_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy)->aux = exit_block_map;
+ entry_block_map->aux = ENTRY_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy);
+ exit_block_map->aux = EXIT_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy);
+
+ /* Duplicate any exception-handling regions. */
+ if (cfun->eh)
+ {
+ id->eh_region_offset
+ = duplicate_eh_regions (cfun_to_copy, remap_decl_1, id,
+ 0, id->eh_region);
+ }
+ /* Use aux pointers to map the original blocks to copy. */
+ FOR_EACH_BB_FN (bb, cfun_to_copy)
+ {
+ basic_block new = copy_bb (id, bb, frequency_scale, count_scale);
+ bb->aux = new;
+ new->aux = bb;
+ }
+
+ last = last_basic_block;
+ /* Now that we've duplicated the blocks, duplicate their edges. */
+ FOR_ALL_BB_FN (bb, cfun_to_copy)
+ copy_edges_for_bb (bb, count_scale, exit_block_map);
+ if (gimple_in_ssa_p (cfun))
+ FOR_ALL_BB_FN (bb, cfun_to_copy)
+ copy_phis_for_bb (bb, id);
+ FOR_ALL_BB_FN (bb, cfun_to_copy)
+ {
+ ((basic_block)bb->aux)->aux = NULL;
+ bb->aux = NULL;
+ }
+ /* Zero out AUX fields of newly created block during EH edge
+ insertion. */
+ for (; last < last_basic_block; last++)
+ BASIC_BLOCK (last)->aux = NULL;
+ entry_block_map->aux = NULL;
+ exit_block_map->aux = NULL;
+
+ return new_fndecl;
+}
+
+/* Make a copy of the body of FN so that it can be inserted inline in
+ another function. */
+
+tree
+copy_generic_body (copy_body_data *id)
+{
+ tree body;
+ tree fndecl = id->src_fn;
+
+ body = DECL_SAVED_TREE (fndecl);
+ walk_tree (&body, copy_body_r, id, NULL);
+
+ return body;
+}
+
+static tree
+copy_body (copy_body_data *id, gcov_type count, int frequency,
+ basic_block entry_block_map, basic_block exit_block_map)
+{
+ tree fndecl = id->src_fn;
+ tree body;
+
+ /* If this body has a CFG, walk CFG and copy. */
+ gcc_assert (ENTRY_BLOCK_PTR_FOR_FUNCTION (DECL_STRUCT_FUNCTION (fndecl)));
+ body = copy_cfg_body (id, count, frequency, entry_block_map, exit_block_map);
+
+ return body;
+}
+
+/* Return true if VALUE is an ADDR_EXPR of an automatic variable
+ defined in function FN, or of a data member thereof. */
+
+static bool
+self_inlining_addr_expr (tree value, tree fn)
+{
+ tree var;
+
+ if (TREE_CODE (value) != ADDR_EXPR)
+ return false;
+
+ var = get_base_address (TREE_OPERAND (value, 0));
+
+ return var && auto_var_in_fn_p (var, fn);
+}
+
+static void
+setup_one_parameter (copy_body_data *id, tree p, tree value, tree fn,
+ basic_block bb, tree *vars)
+{
+ tree init_stmt;
+ tree var;
+ tree rhs = value;
+ tree def = (gimple_in_ssa_p (cfun)
+ ? gimple_default_def (id->src_cfun, p) : NULL);
+
+ if (value
+ && value != error_mark_node
+ && !useless_type_conversion_p (TREE_TYPE (p), TREE_TYPE (value)))
+ {
+ if (fold_convertible_p (TREE_TYPE (p), value))
+ rhs = fold_build1 (NOP_EXPR, TREE_TYPE (p), value);
+ else
+ /* ??? For valid (GIMPLE) programs we should not end up here.
+ Still if something has gone wrong and we end up with truly
+ mismatched types here, fall back to using a VIEW_CONVERT_EXPR
+ to not leak invalid GIMPLE to the following passes. */
+ rhs = fold_build1 (VIEW_CONVERT_EXPR, TREE_TYPE (p), value);
+ }
+
+ /* If the parameter is never assigned to, has no SSA_NAMEs created,
+ we may not need to create a new variable here at all. Instead, we may
+ be able to just use the argument value. */
+ if (TREE_READONLY (p)
+ && !TREE_ADDRESSABLE (p)
+ && value && !TREE_SIDE_EFFECTS (value)
+ && !def)
+ {
+ /* We may produce non-gimple trees by adding NOPs or introduce
+ invalid sharing when operand is not really constant.
+ It is not big deal to prohibit constant propagation here as
+ we will constant propagate in DOM1 pass anyway. */
+ if (is_gimple_min_invariant (value)
+ && useless_type_conversion_p (TREE_TYPE (p),
+ TREE_TYPE (value))
+ /* We have to be very careful about ADDR_EXPR. Make sure
+ the base variable isn't a local variable of the inlined
+ function, e.g., when doing recursive inlining, direct or
+ mutually-recursive or whatever, which is why we don't
+ just test whether fn == current_function_decl. */
+ && ! self_inlining_addr_expr (value, fn))
+ {
+ insert_decl_map (id, p, value);
+ return;
+ }
+ }
+
+ /* Make an equivalent VAR_DECL. Note that we must NOT remap the type
+ here since the type of this decl must be visible to the calling
+ function. */
+ var = copy_decl_to_var (p, id);
+ if (gimple_in_ssa_p (cfun) && TREE_CODE (var) == VAR_DECL)
+ {
+ get_var_ann (var);
+ add_referenced_var (var);
+ }
+
+ /* Register the VAR_DECL as the equivalent for the PARM_DECL;
+ that way, when the PARM_DECL is encountered, it will be
+ automatically replaced by the VAR_DECL. */
+ insert_decl_map (id, p, var);
+
+ /* Declare this new variable. */
+ TREE_CHAIN (var) = *vars;
+ *vars = var;
+
+ /* Make gimplifier happy about this variable. */
+ DECL_SEEN_IN_BIND_EXPR_P (var) = 1;
+
+ /* Even if P was TREE_READONLY, the new VAR should not be.
+ In the original code, we would have constructed a
+ temporary, and then the function body would have never
+ changed the value of P. However, now, we will be
+ constructing VAR directly. The constructor body may
+ change its value multiple times as it is being
+ constructed. Therefore, it must not be TREE_READONLY;
+ the back-end assumes that TREE_READONLY variable is
+ assigned to only once. */
+ if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (p)))
+ TREE_READONLY (var) = 0;
+
+ /* If there is no setup required and we are in SSA, take the easy route
+ replacing all SSA names representing the function parameter by the
+ SSA name passed to function.
+
+ We need to construct map for the variable anyway as it might be used
+ in different SSA names when parameter is set in function.
+
+ FIXME: This usually kills the last connection in between inlined
+ function parameter and the actual value in debug info. Can we do
+ better here? If we just inserted the statement, copy propagation
+ would kill it anyway as it always did in older versions of GCC.
+
+ We might want to introduce a notion that single SSA_NAME might
+ represent multiple variables for purposes of debugging. */
+ if (gimple_in_ssa_p (cfun) && rhs && def && is_gimple_reg (p)
+ && (TREE_CODE (rhs) == SSA_NAME
+ || is_gimple_min_invariant (rhs))
+ && !SSA_NAME_OCCURS_IN_ABNORMAL_PHI (def))
+ {
+ insert_decl_map (id, def, rhs);
+ return;
+ }
+
+ /* If the value of argument is never used, don't care about initializing
+ it. */
+ if (gimple_in_ssa_p (cfun) && !def && is_gimple_reg (p))
+ {
+ gcc_assert (!value || !TREE_SIDE_EFFECTS (value));
+ return;
+ }
+
+ /* Initialize this VAR_DECL from the equivalent argument. Convert
+ the argument to the proper type in case it was promoted. */
+ if (value)
{
- tree value = TREE_VALUE (a);
- append_to_statement_list (value, &init_stmts);
+ block_stmt_iterator bsi = bsi_last (bb);
+
+ if (rhs == error_mark_node)
+ {
+ insert_decl_map (id, p, var);
+ return;
+ }
+
+ STRIP_USELESS_TYPE_CONVERSION (rhs);
+
+ /* We want to use GIMPLE_MODIFY_STMT, not INIT_EXPR here so that we
+ keep our trees in gimple form. */
+ if (def && gimple_in_ssa_p (cfun) && is_gimple_reg (p))
+ {
+ def = remap_ssa_name (def, id);
+ init_stmt = build_gimple_modify_stmt (def, rhs);
+ SSA_NAME_DEF_STMT (def) = init_stmt;
+ SSA_NAME_IS_DEFAULT_DEF (def) = 0;
+ set_default_def (var, NULL);
+ }
+ else
+ init_stmt = build_gimple_modify_stmt (var, rhs);
+
+ /* If we did not create a gimple value and we did not create a gimple
+ cast of a gimple value, then we will need to gimplify INIT_STMTS
+ at the end. Note that is_gimple_cast only checks the outer
+ tree code, not its operand. Thus the explicit check that its
+ operand is a gimple value. */
+ if ((!is_gimple_val (rhs)
+ && (!is_gimple_cast (rhs)
+ || !is_gimple_val (TREE_OPERAND (rhs, 0))))
+ || !is_gimple_reg (var))
+ {
+ tree_stmt_iterator i;
+
+ push_gimplify_context ();
+ gimplify_stmt (&init_stmt);
+ if (gimple_in_ssa_p (cfun)
+ && init_stmt && TREE_CODE (init_stmt) == STATEMENT_LIST)
+ {
+ /* The replacement can expose previously unreferenced
+ variables. */
+ for (i = tsi_start (init_stmt); !tsi_end_p (i); tsi_next (&i))
+ find_new_referenced_vars (tsi_stmt_ptr (i));
+ }
+ pop_gimplify_context (NULL);
+ }
+
+ /* If VAR represents a zero-sized variable, it's possible that the
+ assignment statment may result in no gimple statements. */
+ if (init_stmt)
+ bsi_insert_after (&bsi, init_stmt, BSI_NEW_STMT);
+ if (gimple_in_ssa_p (cfun))
+ for (;!bsi_end_p (bsi); bsi_next (&bsi))
+ mark_symbols_for_renaming (bsi_stmt (bsi));
}
+}
+
+/* Generate code to initialize the parameters of the function at the
+ top of the stack in ID from the CALL_EXPR EXP. */
+
+static void
+initialize_inlined_parameters (copy_body_data *id, tree exp,
+ tree fn, basic_block bb)
+{
+ tree parms;
+ tree a;
+ tree p;
+ tree vars = NULL_TREE;
+ call_expr_arg_iterator iter;
+ tree static_chain = CALL_EXPR_STATIC_CHAIN (exp);
+
+ /* Figure out what the parameters are. */
+ parms = DECL_ARGUMENTS (fn);
+
+ /* Loop through the parameter declarations, replacing each with an
+ equivalent VAR_DECL, appropriately initialized. */
+ for (p = parms, a = first_call_expr_arg (exp, &iter); p;
+ a = next_call_expr_arg (&iter), p = TREE_CHAIN (p))
+ setup_one_parameter (id, p, a, fn, bb, &vars);
/* Initialize the static chain. */
p = DECL_STRUCT_FUNCTION (fn)->static_chain_decl;
+ gcc_assert (fn != current_function_decl);
if (p)
{
/* No static chain? Seems like a bug in tree-nested.c. */
gcc_assert (static_chain);
- setup_one_parameter (id, p, static_chain, fn, &init_stmts, &vars,
- &gimplify_init_stmts_p);
+ setup_one_parameter (id, p, static_chain, fn, bb, &vars);
}
- if (gimplify_init_stmts_p)
- gimplify_body (&init_stmts, current_function_decl);
-
- declare_inline_vars (bind_expr, vars);
- return init_stmts;
+ declare_inline_vars (id->block, vars);
}
-/* Declare a return variable to replace the RESULT_DECL for the function we
- are calling. RETURN_SLOT_ADDR, if non-null, was a fake parameter that
- took the address of the result. MODIFY_DEST, if non-null, was the LHS of
- the MODIFY_EXPR to which this call is the RHS.
+/* Declare a return variable to replace the RESULT_DECL for the
+ function we are calling. An appropriate DECL_STMT is returned.
+ The USE_STMT is filled to contain a use of the declaration to
+ indicate the return value of the function.
+
+ RETURN_SLOT, if non-null is place where to store the result. It
+ is set only for CALL_EXPR_RETURN_SLOT_OPT. MODIFY_DEST, if non-null,
+ was the LHS of the GIMPLE_MODIFY_STMT to which this call is the RHS.
The return value is a (possibly null) value that is the result of the
function as seen by the callee. *USE_P is a (possibly null) value that
holds the result as seen by the caller. */
static tree
-declare_return_variable (inline_data *id, tree return_slot_addr,
- tree modify_dest, tree *use_p)
+declare_return_variable (copy_body_data *id, tree return_slot, tree modify_dest,
+ tree *use_p)
{
- tree callee = VARRAY_TOP_TREE (id->fns);
- tree caller = VARRAY_TREE (id->fns, 0);
+ tree callee = id->src_fn;
+ tree caller = id->dst_fn;
tree result = DECL_RESULT (callee);
tree callee_type = TREE_TYPE (result);
tree caller_type = TREE_TYPE (TREE_TYPE (callee));
/* If there was a return slot, then the return value is the
dereferenced address of that object. */
- if (return_slot_addr)
+ if (return_slot)
{
- /* The front end shouldn't have used both return_slot_addr and
+ /* The front end shouldn't have used both return_slot and
a modify expression. */
gcc_assert (!modify_dest);
if (DECL_BY_REFERENCE (result))
- var = return_slot_addr;
+ {
+ tree return_slot_addr = build_fold_addr_expr (return_slot);
+ STRIP_USELESS_TYPE_CONVERSION (return_slot_addr);
+
+ /* We are going to construct *&return_slot and we can't do that
+ for variables believed to be not addressable.
+
+ FIXME: This check possibly can match, because values returned
+ via return slot optimization are not believed to have address
+ taken by alias analysis. */
+ gcc_assert (TREE_CODE (return_slot) != SSA_NAME);
+ if (gimple_in_ssa_p (cfun))
+ {
+ HOST_WIDE_INT bitsize;
+ HOST_WIDE_INT bitpos;
+ tree offset;
+ enum machine_mode mode;
+ int unsignedp;
+ int volatilep;
+ tree base;
+ base = get_inner_reference (return_slot, &bitsize, &bitpos,
+ &offset,
+ &mode, &unsignedp, &volatilep,
+ false);
+ if (TREE_CODE (base) == INDIRECT_REF)
+ base = TREE_OPERAND (base, 0);
+ if (TREE_CODE (base) == SSA_NAME)
+ base = SSA_NAME_VAR (base);
+ mark_sym_for_renaming (base);
+ }
+ var = return_slot_addr;
+ }
else
- var = build_fold_indirect_ref (return_slot_addr);
+ {
+ var = return_slot;
+ gcc_assert (TREE_CODE (var) != SSA_NAME);
+ TREE_ADDRESSABLE (var) |= TREE_ADDRESSABLE (result);
+ }
+ if ((TREE_CODE (TREE_TYPE (result)) == COMPLEX_TYPE
+ || TREE_CODE (TREE_TYPE (result)) == VECTOR_TYPE)
+ && !DECL_GIMPLE_REG_P (result)
+ && DECL_P (var))
+ DECL_GIMPLE_REG_P (var) = 0;
use = NULL;
goto done;
}
gcc_assert (!TREE_ADDRESSABLE (callee_type));
/* Attempt to avoid creating a new temporary variable. */
- if (modify_dest)
+ if (modify_dest
+ && TREE_CODE (modify_dest) != SSA_NAME)
{
bool use_it = false;
/* We can't use MODIFY_DEST if there's type promotion involved. */
- if (!lang_hooks.types_compatible_p (caller_type, callee_type))
+ if (!useless_type_conversion_p (callee_type, caller_type))
use_it = false;
/* ??? If we're assigning to a variable sized type, then we must
/* If the callee cannot possibly modify MODIFY_DEST, then we can
reuse it as the result of the call directly. Don't do this if
it would promote MODIFY_DEST to addressable. */
- else if (!TREE_STATIC (modify_dest)
- && !TREE_ADDRESSABLE (modify_dest)
- && !TREE_ADDRESSABLE (result))
- use_it = true;
+ else if (TREE_ADDRESSABLE (result))
+ use_it = false;
+ else
+ {
+ tree base_m = get_base_address (modify_dest);
+
+ /* If the base isn't a decl, then it's a pointer, and we don't
+ know where that's going to go. */
+ if (!DECL_P (base_m))
+ use_it = false;
+ else if (is_global_var (base_m))
+ use_it = false;
+ else if ((TREE_CODE (TREE_TYPE (result)) == COMPLEX_TYPE
+ || TREE_CODE (TREE_TYPE (result)) == VECTOR_TYPE)
+ && !DECL_GIMPLE_REG_P (result)
+ && DECL_GIMPLE_REG_P (base_m))
+ use_it = false;
+ else if (!TREE_ADDRESSABLE (base_m))
+ use_it = true;
+ }
if (use_it)
{
gcc_assert (TREE_CODE (TYPE_SIZE_UNIT (callee_type)) == INTEGER_CST);
- var = copy_decl_for_inlining (result, callee, caller);
+ var = copy_result_decl_to_var (result, id);
+ if (gimple_in_ssa_p (cfun))
+ {
+ get_var_ann (var);
+ add_referenced_var (var);
+ }
+
DECL_SEEN_IN_BIND_EXPR_P (var) = 1;
- DECL_STRUCT_FUNCTION (caller)->unexpanded_var_list
+ DECL_STRUCT_FUNCTION (caller)->local_decls
= tree_cons (NULL_TREE, var,
- DECL_STRUCT_FUNCTION (caller)->unexpanded_var_list);
+ DECL_STRUCT_FUNCTION (caller)->local_decls);
/* Do not have the rest of GCC warn about this variable as it should
not be visible to the user. */
TREE_NO_WARNING (var) = 1;
+ declare_inline_vars (id->block, var);
+
/* Build the use expr. If the return type of the function was
promoted, convert it back to the expected type. */
use = var;
- if (!lang_hooks.types_compatible_p (TREE_TYPE (var), caller_type))
+ if (!useless_type_conversion_p (caller_type, TREE_TYPE (var)))
use = fold_convert (caller_type, var);
+
+ STRIP_USELESS_TYPE_CONVERSION (use);
+
+ if (DECL_BY_REFERENCE (result))
+ var = build_fold_addr_expr (var);
done:
/* Register the VAR_DECL as the equivalent for the RESULT_DECL; that
&& !lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)))
{
inline_forbidden_reason
- = N_("%Jfunction %qF can never be inlined because it uses "
+ = G_("function %q+F can never be inlined because it uses "
"alloca (override using the always_inline attribute)");
return node;
}
if (setjmp_call_p (t))
{
inline_forbidden_reason
- = N_("%Jfunction %qF can never be inlined because it uses setjmp");
+ = G_("function %q+F can never be inlined because it uses setjmp");
return node;
}
/* We cannot inline functions that take a variable number of
arguments. */
case BUILT_IN_VA_START:
- case BUILT_IN_STDARG_START:
case BUILT_IN_NEXT_ARG:
case BUILT_IN_VA_END:
inline_forbidden_reason
- = N_("%Jfunction %qF can never be inlined because it "
+ = G_("function %q+F can never be inlined because it "
"uses variable argument lists");
return node;
function calling __builtin_longjmp to be inlined into the
function calling __builtin_setjmp, Things will Go Awry. */
inline_forbidden_reason
- = N_("%Jfunction %qF can never be inlined because "
+ = G_("function %q+F can never be inlined because "
"it uses setjmp-longjmp exception handling");
return node;
case BUILT_IN_NONLOCAL_GOTO:
/* Similarly. */
inline_forbidden_reason
- = N_("%Jfunction %qF can never be inlined because "
+ = G_("function %q+F can never be inlined because "
"it uses non-local goto");
return node;
+ case BUILT_IN_RETURN:
+ case BUILT_IN_APPLY_ARGS:
+ /* If a __builtin_apply_args caller would be inlined,
+ it would be saving arguments of the function it has
+ been inlined into. Similarly __builtin_return would
+ return from the function the inline has been inlined into. */
+ inline_forbidden_reason
+ = G_("function %q+F can never be inlined because "
+ "it uses __builtin_return or __builtin_apply_args");
+ return node;
+
default:
break;
}
if (TREE_CODE (t) != LABEL_DECL)
{
inline_forbidden_reason
- = N_("%Jfunction %qF can never be inlined "
+ = G_("function %q+F can never be inlined "
"because it contains a computed goto");
return node;
}
because we cannot remap the destination label used in the
function that is performing the non-local goto. */
inline_forbidden_reason
- = N_("%Jfunction %qF can never be inlined "
+ = G_("function %q+F can never be inlined "
"because it receives a non-local goto");
return node;
}
UNION_TYPE nodes, then it goes into infinite recursion on a
structure containing a pointer to its own type. If it doesn't,
then the type node for S doesn't get adjusted properly when
- F is inlined, and we abort in find_function_data.
+ F is inlined.
??? This is likely no longer true, but it's too late in the 4.0
cycle to try to find out. This should be checked for 4.1. */
if (variably_modified_type_p (TREE_TYPE (t), NULL))
{
inline_forbidden_reason
- = N_("%Jfunction %qF can never be inlined "
+ = G_("function %q+F can never be inlined "
"because it uses variable sized variables");
return node;
}
return NULL_TREE;
}
+static tree
+inline_forbidden_p_2 (tree *nodep, int *walk_subtrees,
+ void *fnp)
+{
+ tree node = *nodep;
+ tree fn = (tree) fnp;
+
+ if (TREE_CODE (node) == LABEL_DECL && DECL_CONTEXT (node) == fn)
+ {
+ inline_forbidden_reason
+ = G_("function %q+F can never be inlined "
+ "because it saves address of local label in a static variable");
+ return node;
+ }
+
+ if (TYPE_P (node))
+ *walk_subtrees = 0;
+
+ return NULL_TREE;
+}
+
/* Return subexpression representing possible alloca call, if any. */
static tree
inline_forbidden_p (tree fndecl)
{
location_t saved_loc = input_location;
- tree ret = walk_tree_without_duplicates (&DECL_SAVED_TREE (fndecl),
- inline_forbidden_p_1, fndecl);
+ block_stmt_iterator bsi;
+ basic_block bb;
+ tree ret = NULL_TREE;
+ struct function *fun = DECL_STRUCT_FUNCTION (fndecl);
+ tree step;
+
+ FOR_EACH_BB_FN (bb, fun)
+ for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi))
+ {
+ ret = walk_tree_without_duplicates (bsi_stmt_ptr (bsi),
+ inline_forbidden_p_1, fndecl);
+ if (ret)
+ goto egress;
+ }
+
+ for (step = fun->local_decls; step; step = TREE_CHAIN (step))
+ {
+ tree decl = TREE_VALUE (step);
+ if (TREE_CODE (decl) == VAR_DECL
+ && TREE_STATIC (decl)
+ && !DECL_EXTERNAL (decl)
+ && DECL_INITIAL (decl))
+ ret = walk_tree_without_duplicates (&DECL_INITIAL (decl),
+ inline_forbidden_p_2, fndecl);
+ if (ret)
+ goto egress;
+ }
+egress:
input_location = saved_loc;
return ret;
}
inlinable_function_p (tree fn)
{
bool inlinable = true;
+ bool do_warning;
+ tree always_inline;
/* If we've already decided this function shouldn't be inlined,
there's no need to check again. */
if (DECL_UNINLINABLE (fn))
return false;
- /* See if there is any language-specific reason it cannot be
- inlined. (It is important that this hook be called early because
- in C++ it may result in template instantiation.)
- If the function is not inlinable for language-specific reasons,
- it is left up to the langhook to explain why. */
- inlinable = !lang_hooks.tree_inlining.cannot_inline_tree_fn (&fn);
+ /* We only warn for functions declared `inline' by the user. */
+ do_warning = (warn_inline
+ && DECL_INLINE (fn)
+ && DECL_DECLARED_INLINE_P (fn)
+ && !DECL_IN_SYSTEM_HEADER (fn));
+
+ always_inline = lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn));
+
+ if (flag_really_no_inline
+ && always_inline == NULL)
+ {
+ if (do_warning)
+ warning (OPT_Winline, "function %q+F can never be inlined because it "
+ "is suppressed using -fno-inline", fn);
+ inlinable = false;
+ }
+
+ /* Don't auto-inline anything that might not be bound within
+ this unit of translation. */
+ else if (!DECL_DECLARED_INLINE_P (fn)
+ && DECL_REPLACEABLE_P (fn))
+ inlinable = false;
+
+ else if (!function_attribute_inlinable_p (fn))
+ {
+ if (do_warning)
+ warning (OPT_Winline, "function %q+F can never be inlined because it "
+ "uses attributes conflicting with inlining", fn);
+ inlinable = false;
+ }
/* If we don't have the function body available, we can't inline it.
However, this should not be recorded since we also get here for
about functions that would for example call alloca. But since
this a property of the function, just one warning is enough.
As a bonus we can now give more details about the reason why a
- function is not inlinable.
- We only warn for functions declared `inline' by the user. */
- bool do_warning = (warn_inline
- && DECL_INLINE (fn)
- && DECL_DECLARED_INLINE_P (fn)
- && !DECL_IN_SYSTEM_HEADER (fn));
-
- if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)))
- sorry (inline_forbidden_reason, fn, fn);
+ function is not inlinable. */
+ if (always_inline)
+ sorry (inline_forbidden_reason, fn);
else if (do_warning)
- warning (inline_forbidden_reason, fn, fn);
+ warning (OPT_Winline, inline_forbidden_reason, fn);
inlinable = false;
}
return inlinable;
}
-/* Used by estimate_num_insns. Estimate number of instructions seen
- by given statement. */
+/* Estimate the cost of a memory move. Use machine dependent
+ word size and take possible memcpy call into account. */
-static tree
-estimate_num_insns_1 (tree *tp, int *walk_subtrees, void *data)
+int
+estimate_move_cost (tree type)
+{
+ HOST_WIDE_INT size;
+
+ size = int_size_in_bytes (type);
+
+ if (size < 0 || size > MOVE_MAX_PIECES * MOVE_RATIO)
+ /* Cost of a memcpy call, 3 arguments and the call. */
+ return 4;
+ else
+ return ((size + MOVE_MAX_PIECES - 1) / MOVE_MAX_PIECES);
+}
+
+/* Arguments for estimate_num_insns_1. */
+
+struct eni_data
{
- int *count = data;
+ /* Used to return the number of insns. */
+ int count;
+
+ /* Weights of various constructs. */
+ eni_weights *weights;
+};
+
+/* Used by estimate_num_insns. Estimate number of instructions seen
+ by given statement. */
+
+static tree
+estimate_num_insns_1 (tree *tp, int *walk_subtrees, void *data)
+{
+ struct eni_data *d = data;
tree x = *tp;
+ unsigned cost;
if (IS_TYPE_OR_DECL_P (x))
{
case COMPONENT_REF:
case BIT_FIELD_REF:
case INDIRECT_REF:
+ case ALIGN_INDIRECT_REF:
+ case MISALIGNED_INDIRECT_REF:
case ARRAY_REF:
case ARRAY_RANGE_REF:
case OBJ_TYPE_REF:
case COMPOUND_EXPR:
case BIND_EXPR:
case WITH_CLEANUP_EXPR:
- case NOP_EXPR:
+ case PAREN_EXPR:
+ CASE_CONVERT:
case VIEW_CONVERT_EXPR:
case SAVE_EXPR:
case ADDR_EXPR:
case EH_FILTER_EXPR:
case STATEMENT_LIST:
case ERROR_MARK:
- case NON_LVALUE_EXPR:
case FDESC_EXPR:
case VA_ARG_EXPR:
case TRY_CATCH_EXPR:
case LOOP_EXPR:
case PHI_NODE:
case WITH_SIZE_EXPR:
+ case OMP_CLAUSE:
+ case OMP_RETURN:
+ case OMP_CONTINUE:
+ case OMP_SECTIONS_SWITCH:
+ case OMP_ATOMIC_STORE:
break;
/* We don't account constants for now. Assume that the cost is amortized
by operations that do use them. We may re-consider this decision once
- we are able to optimize the tree before estimating it's size and break
+ we are able to optimize the tree before estimating its size and break
out static initializers. */
case IDENTIFIER_NODE:
case INTEGER_CST:
case REAL_CST:
+ case FIXED_CST:
case COMPLEX_CST:
case VECTOR_CST:
case STRING_CST:
+ case PREDICT_EXPR:
+ *walk_subtrees = 0;
+ return NULL;
+
+ /* CHANGE_DYNAMIC_TYPE_EXPR explicitly expands to nothing. */
+ case CHANGE_DYNAMIC_TYPE_EXPR:
*walk_subtrees = 0;
return NULL;
- /* Recognize assignments of large structures and constructors of
- big arrays. */
+ /* Try to estimate the cost of assignments. We have three cases to
+ deal with:
+ 1) Simple assignments to registers;
+ 2) Stores to things that must live in memory. This includes
+ "normal" stores to scalars, but also assignments of large
+ structures, or constructors of big arrays;
+ 3) TARGET_EXPRs.
+
+ Let us look at the first two cases, assuming we have "a = b + C":
+ <GIMPLE_MODIFY_STMT <var_decl "a">
+ <plus_expr <var_decl "b"> <constant C>>
+ If "a" is a GIMPLE register, the assignment to it is free on almost
+ any target, because "a" usually ends up in a real register. Hence
+ the only cost of this expression comes from the PLUS_EXPR, and we
+ can ignore the GIMPLE_MODIFY_STMT.
+ If "a" is not a GIMPLE register, the assignment to "a" will most
+ likely be a real store, so the cost of the GIMPLE_MODIFY_STMT is the cost
+ of moving something into "a", which we compute using the function
+ estimate_move_cost.
+
+ The third case deals with TARGET_EXPRs, for which the semantics are
+ that a temporary is assigned, unless the TARGET_EXPR itself is being
+ assigned to something else. In the latter case we do not need the
+ temporary. E.g. in:
+ <GIMPLE_MODIFY_STMT <var_decl "a"> <target_expr>>, the
+ GIMPLE_MODIFY_STMT is free. */
case INIT_EXPR:
- case MODIFY_EXPR:
- x = TREE_OPERAND (x, 0);
- /* FALLTHRU */
- case TARGET_EXPR:
- case CONSTRUCTOR:
- {
- HOST_WIDE_INT size;
+ case GIMPLE_MODIFY_STMT:
+ /* Is the right and side a TARGET_EXPR? */
+ if (TREE_CODE (GENERIC_TREE_OPERAND (x, 1)) == TARGET_EXPR)
+ break;
+ /* ... fall through ... */
- size = int_size_in_bytes (TREE_TYPE (x));
+ case TARGET_EXPR:
+ x = GENERIC_TREE_OPERAND (x, 0);
+ /* Is this an assignments to a register? */
+ if (is_gimple_reg (x))
+ break;
+ /* Otherwise it's a store, so fall through to compute the move cost. */
- if (size < 0 || size > MOVE_MAX_PIECES * MOVE_RATIO)
- *count += 10;
- else
- *count += ((size + MOVE_MAX_PIECES - 1) / MOVE_MAX_PIECES);
- }
+ case CONSTRUCTOR:
+ d->count += estimate_move_cost (TREE_TYPE (x));
break;
- /* Assign cost of 1 to usual operations.
- ??? We may consider mapping RTL costs to this. */
+ /* Assign cost of 1 to usual operations.
+ ??? We may consider mapping RTL costs to this. */
case COND_EXPR:
+ case VEC_COND_EXPR:
case PLUS_EXPR:
+ case POINTER_PLUS_EXPR:
case MINUS_EXPR:
case MULT_EXPR:
+ case FIXED_CONVERT_EXPR:
case FIX_TRUNC_EXPR:
- case FIX_CEIL_EXPR:
- case FIX_FLOOR_EXPR:
- case FIX_ROUND_EXPR:
case NEGATE_EXPR:
case FLOAT_EXPR:
case RSHIFT_EXPR:
case LROTATE_EXPR:
case RROTATE_EXPR:
+ case VEC_LSHIFT_EXPR:
+ case VEC_RSHIFT_EXPR:
case BIT_IOR_EXPR:
case BIT_XOR_EXPR:
case UNEQ_EXPR:
case LTGT_EXPR:
- case CONVERT_EXPR:
-
case CONJ_EXPR:
case PREDECREMENT_EXPR:
case POSTDECREMENT_EXPR:
case POSTINCREMENT_EXPR:
- case SWITCH_EXPR:
-
case ASM_EXPR:
+ case REALIGN_LOAD_EXPR:
+
+ case REDUC_MAX_EXPR:
+ case REDUC_MIN_EXPR:
+ case REDUC_PLUS_EXPR:
+ case WIDEN_SUM_EXPR:
+ case DOT_PROD_EXPR:
+ case VEC_WIDEN_MULT_HI_EXPR:
+ case VEC_WIDEN_MULT_LO_EXPR:
+ case VEC_UNPACK_HI_EXPR:
+ case VEC_UNPACK_LO_EXPR:
+ case VEC_UNPACK_FLOAT_HI_EXPR:
+ case VEC_UNPACK_FLOAT_LO_EXPR:
+ case VEC_PACK_TRUNC_EXPR:
+ case VEC_PACK_SAT_EXPR:
+ case VEC_PACK_FIX_TRUNC_EXPR:
+
+ case WIDEN_MULT_EXPR:
+
+ case VEC_EXTRACT_EVEN_EXPR:
+ case VEC_EXTRACT_ODD_EXPR:
+ case VEC_INTERLEAVE_HIGH_EXPR:
+ case VEC_INTERLEAVE_LOW_EXPR:
+
case RESX_EXPR:
- *count += 1;
+ d->count += 1;
+ break;
+
+ case SWITCH_EXPR:
+ /* Take into account cost of the switch + guess 2 conditional jumps for
+ each case label.
+
+ TODO: once the switch expansion logic is sufficiently separated, we can
+ do better job on estimating cost of the switch. */
+ d->count += TREE_VEC_LENGTH (SWITCH_LABELS (x)) * 2;
break;
/* Few special cases of expensive operations. This is useful
case FLOOR_MOD_EXPR:
case ROUND_MOD_EXPR:
case RDIV_EXPR:
- *count += 10;
+ d->count += d->weights->div_mod_cost;
break;
case CALL_EXPR:
{
tree decl = get_callee_fndecl (x);
+ tree addr = CALL_EXPR_FN (x);
+ tree funtype = TREE_TYPE (addr);
+
+ gcc_assert (POINTER_TYPE_P (funtype));
+ funtype = TREE_TYPE (funtype);
- if (decl && DECL_BUILT_IN (decl))
+ if (decl && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_MD)
+ cost = d->weights->target_builtin_call_cost;
+ else
+ cost = d->weights->call_cost;
+
+ if (decl && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
switch (DECL_FUNCTION_CODE (decl))
{
case BUILT_IN_CONSTANT_P:
return NULL_TREE;
case BUILT_IN_EXPECT:
return NULL_TREE;
+ /* Prefetch instruction is not expensive. */
+ case BUILT_IN_PREFETCH:
+ cost = 1;
+ break;
default:
break;
}
- *count += 10;
+
+ if (decl)
+ funtype = TREE_TYPE (decl);
+
+ /* Our cost must be kept in sync with cgraph_estimate_size_after_inlining
+ that does use function declaration to figure out the arguments.
+
+ When we deal with function with no body nor prototype, base estimates on
+ actual parameters of the call expression. Otherwise use either the actual
+ arguments types or function declaration for more precise answer. */
+ if (decl && DECL_ARGUMENTS (decl))
+ {
+ tree arg;
+ for (arg = DECL_ARGUMENTS (decl); arg; arg = TREE_CHAIN (arg))
+ d->count += estimate_move_cost (TREE_TYPE (arg));
+ }
+ else if (funtype && prototype_p (funtype))
+ {
+ tree t;
+ for (t = TYPE_ARG_TYPES (funtype); t; t = TREE_CHAIN (t))
+ d->count += estimate_move_cost (TREE_VALUE (t));
+ }
+ else
+ {
+ tree a;
+ call_expr_arg_iterator iter;
+ FOR_EACH_CALL_EXPR_ARG (a, iter, x)
+ d->count += estimate_move_cost (TREE_TYPE (a));
+ }
+
+ d->count += cost;
break;
}
+
+ case OMP_PARALLEL:
+ case OMP_FOR:
+ case OMP_SECTIONS:
+ case OMP_SINGLE:
+ case OMP_SECTION:
+ case OMP_MASTER:
+ case OMP_ORDERED:
+ case OMP_CRITICAL:
+ case OMP_ATOMIC:
+ case OMP_ATOMIC_LOAD:
+ /* OpenMP directives are generally very expensive. */
+ d->count += d->weights->omp_cost;
+ break;
+
default:
- /* Abort here se we know we don't miss any nodes. */
gcc_unreachable ();
}
return NULL;
}
-/* Estimate number of instructions that will be created by expanding EXPR. */
+/* Estimate number of instructions that will be created by expanding EXPR.
+ WEIGHTS contains weights attributed to various constructs. */
int
-estimate_num_insns (tree expr)
+estimate_num_insns (tree expr, eni_weights *weights)
{
- int num = 0;
- walk_tree_without_duplicates (&expr, estimate_num_insns_1, &num);
- return num;
+ struct pointer_set_t *visited_nodes;
+ basic_block bb;
+ block_stmt_iterator bsi;
+ struct function *my_function;
+ struct eni_data data;
+
+ data.count = 0;
+ data.weights = weights;
+
+ /* If we're given an entire function, walk the CFG. */
+ if (TREE_CODE (expr) == FUNCTION_DECL)
+ {
+ my_function = DECL_STRUCT_FUNCTION (expr);
+ gcc_assert (my_function && my_function->cfg);
+ visited_nodes = pointer_set_create ();
+ FOR_EACH_BB_FN (bb, my_function)
+ {
+ for (bsi = bsi_start (bb);
+ !bsi_end_p (bsi);
+ bsi_next (&bsi))
+ {
+ walk_tree (bsi_stmt_ptr (bsi), estimate_num_insns_1,
+ &data, visited_nodes);
+ }
+ }
+ pointer_set_destroy (visited_nodes);
+ }
+ else
+ walk_tree_without_duplicates (&expr, estimate_num_insns_1, &data);
+
+ return data.count;
+}
+
+/* Initializes weights used by estimate_num_insns. */
+
+void
+init_inline_once (void)
+{
+ eni_inlining_weights.call_cost = PARAM_VALUE (PARAM_INLINE_CALL_COST);
+ eni_inlining_weights.target_builtin_call_cost = 1;
+ eni_inlining_weights.div_mod_cost = 10;
+ eni_inlining_weights.omp_cost = 40;
+
+ eni_size_weights.call_cost = 1;
+ eni_size_weights.target_builtin_call_cost = 1;
+ eni_size_weights.div_mod_cost = 1;
+ eni_size_weights.omp_cost = 40;
+
+ /* Estimating time for call is difficult, since we have no idea what the
+ called function does. In the current uses of eni_time_weights,
+ underestimating the cost does less harm than overestimating it, so
+ we choose a rather small value here. */
+ eni_time_weights.call_cost = 10;
+ eni_time_weights.target_builtin_call_cost = 10;
+ eni_time_weights.div_mod_cost = 10;
+ eni_time_weights.omp_cost = 40;
+}
+
+/* Install new lexical TREE_BLOCK underneath 'current_block'. */
+static void
+add_lexical_block (tree current_block, tree new_block)
+{
+ tree *blk_p;
+
+ /* Walk to the last sub-block. */
+ for (blk_p = &BLOCK_SUBBLOCKS (current_block);
+ *blk_p;
+ blk_p = &BLOCK_CHAIN (*blk_p))
+ ;
+ *blk_p = new_block;
+ BLOCK_SUPERCONTEXT (new_block) = current_block;
}
/* If *TP is a CALL_EXPR, replace it with its inline expansion. */
-static tree
-expand_call_inline (tree *tp, int *walk_subtrees, void *data)
+static bool
+expand_call_inline (basic_block bb, tree stmt, tree *tp, void *data)
{
- inline_data *id;
+ copy_body_data *id;
tree t;
- tree expr;
- tree stmt;
- tree use_retvar;
- tree decl;
+ tree retvar, use_retvar;
tree fn;
- tree arg_inits;
- tree *inlined_body;
- splay_tree st;
- tree args;
- tree return_slot_addr;
+ struct pointer_map_t *st;
+ tree return_slot;
tree modify_dest;
location_t saved_location;
- struct cgraph_edge *edge;
+ struct cgraph_edge *cg_edge;
const char *reason;
+ basic_block return_block;
+ edge e;
+ block_stmt_iterator bsi, stmt_bsi;
+ bool successfully_inlined = FALSE;
+ bool purge_dead_abnormal_edges;
+ tree t_step;
+ tree var;
/* See what we've got. */
- id = (inline_data *) data;
+ id = (copy_body_data *) data;
t = *tp;
/* Set input_location here so we get the right instantiation context
if (EXPR_HAS_LOCATION (t))
input_location = EXPR_LOCATION (t);
- /* Recurse, but letting recursive invocations know that we are
- inside the body of a TARGET_EXPR. */
- if (TREE_CODE (*tp) == TARGET_EXPR)
- {
-#if 0
- int i, len = TREE_CODE_LENGTH (TARGET_EXPR);
-
- /* We're walking our own subtrees. */
- *walk_subtrees = 0;
-
- /* Actually walk over them. This loop is the body of
- walk_trees, omitting the case where the TARGET_EXPR
- itself is handled. */
- for (i = 0; i < len; ++i)
- {
- if (i == 2)
- ++id->in_target_cleanup_p;
- walk_tree (&TREE_OPERAND (*tp, i), expand_call_inline, data,
- id->tree_pruner);
- if (i == 2)
- --id->in_target_cleanup_p;
- }
-
- goto egress;
-#endif
- }
-
- if (TYPE_P (t))
- /* Because types were not copied in copy_body, CALL_EXPRs beneath
- them should not be expanded. This can happen if the type is a
- dynamic array type, for example. */
- *walk_subtrees = 0;
-
/* From here on, we're only interested in CALL_EXPRs. */
if (TREE_CODE (t) != CALL_EXPR)
goto egress;
/* Objective C and fortran still calls tree_rest_of_compilation directly.
Kill this check once this is fixed. */
- if (!id->current_node->analyzed)
+ if (!id->dst_node->analyzed)
goto egress;
- edge = cgraph_edge (id->current_node, t);
+ cg_edge = cgraph_edge (id->dst_node, stmt);
/* Constant propagation on argument done during previous inlining
may create new direct call. Produce an edge for it. */
- if (!edge)
+ if (!cg_edge)
{
struct cgraph_node *dest = cgraph_node (fn);
constant propagating arguments. In all other cases we hit a bug
(incorrect node sharing is most common reason for missing edges. */
gcc_assert (dest->needed || !flag_unit_at_a_time);
- cgraph_create_edge (id->node, dest, t)->inline_failed
+ cgraph_create_edge (id->dst_node, dest, stmt,
+ bb->count, CGRAPH_FREQ_BASE,
+ bb->loop_depth)->inline_failed
= N_("originally indirect function call not considered for inlining");
+ if (dump_file)
+ {
+ fprintf (dump_file, "Created new direct edge to %s",
+ cgraph_node_name (dest));
+ }
goto egress;
}
/* Don't try to inline functions that are not well-suited to
inlining. */
- if (!cgraph_inline_p (edge, &reason))
+ if (!cgraph_inline_p (cg_edge, &reason))
{
- if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)))
+ if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn))
+ /* Avoid warnings during early inline pass. */
+ && (!flag_unit_at_a_time || cgraph_global_info_ready))
{
- sorry ("%Jinlining failed in call to %qF: %s", fn, fn, reason);
+ sorry ("inlining failed in call to %q+F: %s", fn, reason);
sorry ("called from here");
}
else if (warn_inline && DECL_DECLARED_INLINE_P (fn)
&& !DECL_IN_SYSTEM_HEADER (fn)
&& strlen (reason)
- && !lookup_attribute ("noinline", DECL_ATTRIBUTES (fn)))
+ && !lookup_attribute ("noinline", DECL_ATTRIBUTES (fn))
+ /* Avoid warnings during early inline pass. */
+ && (!flag_unit_at_a_time || cgraph_global_info_ready))
{
- warning ("%Jinlining failed in call to %qF: %s", fn, fn, reason);
- warning ("called from here");
+ warning (OPT_Winline, "inlining failed in call to %q+F: %s",
+ fn, reason);
+ warning (OPT_Winline, "called from here");
}
goto egress;
}
+ fn = cg_edge->callee->decl;
#ifdef ENABLE_CHECKING
- if (edge->callee->decl != id->node->decl)
- verify_cgraph_node (edge->callee);
+ if (cg_edge->callee->decl != id->dst_node->decl)
+ verify_cgraph_node (cg_edge->callee);
#endif
- if (! lang_hooks.tree_inlining.start_inlining (fn))
- goto egress;
+ /* We will be inlining this callee. */
+ id->eh_region = lookup_stmt_eh_region (stmt);
+
+ /* Split the block holding the CALL_EXPR. */
+ e = split_block (bb, stmt);
+ bb = e->src;
+ return_block = e->dest;
+ remove_edge (e);
+
+ /* split_block splits after the statement; work around this by
+ moving the call into the second block manually. Not pretty,
+ but seems easier than doing the CFG manipulation by hand
+ when the CALL_EXPR is in the last statement of BB. */
+ stmt_bsi = bsi_last (bb);
+ bsi_remove (&stmt_bsi, false);
+
+ /* If the CALL_EXPR was in the last statement of BB, it may have
+ been the source of abnormal edges. In this case, schedule
+ the removal of dead abnormal edges. */
+ bsi = bsi_start (return_block);
+ if (bsi_end_p (bsi))
+ {
+ bsi_insert_after (&bsi, stmt, BSI_NEW_STMT);
+ purge_dead_abnormal_edges = true;
+ }
+ else
+ {
+ bsi_insert_before (&bsi, stmt, BSI_NEW_STMT);
+ purge_dead_abnormal_edges = false;
+ }
+
+ stmt_bsi = bsi_start (return_block);
/* Build a block containing code to initialize the arguments, the
actual inline expansion of the body, and a label for the return
statements within the function to jump to. The type of the
statement expression is the return type of the function call. */
- stmt = NULL;
- expr = build (BIND_EXPR, void_type_node, NULL_TREE,
- stmt, make_node (BLOCK));
- BLOCK_ABSTRACT_ORIGIN (BIND_EXPR_BLOCK (expr)) = fn;
+ id->block = make_node (BLOCK);
+ BLOCK_ABSTRACT_ORIGIN (id->block) = fn;
+ BLOCK_SOURCE_LOCATION (id->block) = input_location;
+ add_lexical_block (TREE_BLOCK (stmt), id->block);
/* Local declarations will be replaced by their equivalents in this
map. */
st = id->decl_map;
- id->decl_map = splay_tree_new (splay_tree_compare_pointers,
- NULL, NULL);
-
- /* Initialize the parameters. */
- args = TREE_OPERAND (t, 1);
- return_slot_addr = NULL_TREE;
- if (CALL_EXPR_HAS_RETURN_SLOT_ADDR (t))
- {
- return_slot_addr = TREE_VALUE (args);
- args = TREE_CHAIN (args);
- TREE_TYPE (expr) = void_type_node;
- }
-
- arg_inits = initialize_inlined_parameters (id, args, TREE_OPERAND (t, 2),
- fn, expr);
- if (arg_inits)
- {
- /* Expand any inlined calls in the initializers. Do this before we
- push FN on the stack of functions we are inlining; we want to
- inline calls to FN that appear in the initializers for the
- parameters.
-
- Note we need to save and restore the saved tree statement iterator
- to avoid having it clobbered by expand_calls_inline. */
- tree_stmt_iterator save_tsi;
+ id->decl_map = pointer_map_create ();
- save_tsi = id->tsi;
- expand_calls_inline (&arg_inits, id);
- id->tsi = save_tsi;
+ /* Record the function we are about to inline. */
+ id->src_fn = fn;
+ id->src_node = cg_edge->callee;
+ id->src_cfun = DECL_STRUCT_FUNCTION (fn);
+ id->call_expr = t;
- /* And add them to the tree. */
- append_to_statement_list (arg_inits, &BIND_EXPR_BODY (expr));
- }
+ gcc_assert (!id->src_cfun->after_inlining);
- /* Record the function we are about to inline so that we can avoid
- recursing into it. */
- VARRAY_PUSH_TREE (id->fns, fn);
+ id->entry_bb = bb;
+ initialize_inlined_parameters (id, t, fn, bb);
- /* Record the function we are about to inline if optimize_function
- has not been called on it yet and we don't have it in the list. */
- if (! DECL_INLINED_FNS (fn))
- {
- int i;
-
- for (i = VARRAY_ACTIVE_SIZE (id->inlined_fns) - 1; i >= 0; i--)
- if (VARRAY_TREE (id->inlined_fns, i) == fn)
- break;
- if (i < 0)
- VARRAY_PUSH_TREE (id->inlined_fns, fn);
- }
+ if (DECL_INITIAL (fn))
+ add_lexical_block (id->block, remap_blocks (DECL_INITIAL (fn), id));
/* Return statements in the function body will be replaced by jumps
to the RET_LABEL. */
- id->ret_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
- DECL_ARTIFICIAL (id->ret_label) = 1;
- DECL_CONTEXT (id->ret_label) = VARRAY_TREE (id->fns, 0);
- insert_decl_map (id, id->ret_label, id->ret_label);
gcc_assert (DECL_INITIAL (fn));
gcc_assert (TREE_CODE (DECL_INITIAL (fn)) == BLOCK);
/* Find the lhs to which the result of this call is assigned. */
- modify_dest = tsi_stmt (id->tsi);
- if (TREE_CODE (modify_dest) == MODIFY_EXPR)
- modify_dest = TREE_OPERAND (modify_dest, 0);
+ return_slot = NULL;
+ if (TREE_CODE (stmt) == GIMPLE_MODIFY_STMT)
+ {
+ modify_dest = GIMPLE_STMT_OPERAND (stmt, 0);
+
+ /* The function which we are inlining might not return a value,
+ in which case we should issue a warning that the function
+ does not return a value. In that case the optimizers will
+ see that the variable to which the value is assigned was not
+ initialized. We do not want to issue a warning about that
+ uninitialized variable. */
+ if (DECL_P (modify_dest))
+ TREE_NO_WARNING (modify_dest) = 1;
+ if (CALL_EXPR_RETURN_SLOT_OPT (t))
+ {
+ return_slot = modify_dest;
+ modify_dest = NULL;
+ }
+ }
else
modify_dest = NULL;
+ /* If we are inlining a call to the C++ operator new, we don't want
+ to use type based alias analysis on the return value. Otherwise
+ we may get confused if the compiler sees that the inlined new
+ function returns a pointer which was just deleted. See bug
+ 33407. */
+ if (DECL_IS_OPERATOR_NEW (fn))
+ {
+ return_slot = NULL;
+ modify_dest = NULL;
+ }
+
/* Declare the return variable for the function. */
- decl = declare_return_variable (id, return_slot_addr,
- modify_dest, &use_retvar);
+ retvar = declare_return_variable (id, return_slot,
+ modify_dest, &use_retvar);
- /* After we've initialized the parameters, we insert the body of the
- function itself. */
- {
- struct cgraph_node *old_node = id->current_node;
+ if (DECL_IS_OPERATOR_NEW (fn))
+ {
+ gcc_assert (TREE_CODE (retvar) == VAR_DECL
+ && POINTER_TYPE_P (TREE_TYPE (retvar)));
+ DECL_NO_TBAA_P (retvar) = 1;
+ }
- id->current_node = edge->callee;
- append_to_statement_list (copy_body (id), &BIND_EXPR_BODY (expr));
- id->current_node = old_node;
- }
- inlined_body = &BIND_EXPR_BODY (expr);
+ /* This is it. Duplicate the callee body. Assume callee is
+ pre-gimplified. Note that we must not alter the caller
+ function in any way before this point, as this CALL_EXPR may be
+ a self-referential call; if we're calling ourselves, we need to
+ duplicate our body before altering anything. */
+ copy_body (id, bb->count, bb->frequency, bb, return_block);
- /* After the body of the function comes the RET_LABEL. This must come
- before we evaluate the returned value below, because that evaluation
- may cause RTL to be generated. */
- if (TREE_USED (id->ret_label))
+ /* Add local vars in this inlined callee to caller. */
+ t_step = id->src_cfun->local_decls;
+ for (; t_step; t_step = TREE_CHAIN (t_step))
{
- tree label = build1 (LABEL_EXPR, void_type_node, id->ret_label);
- append_to_statement_list (label, &BIND_EXPR_BODY (expr));
+ var = TREE_VALUE (t_step);
+ if (TREE_STATIC (var) && !TREE_ASM_WRITTEN (var))
+ cfun->local_decls = tree_cons (NULL_TREE, var,
+ cfun->local_decls);
+ else
+ cfun->local_decls = tree_cons (NULL_TREE, remap_decl (var, id),
+ cfun->local_decls);
}
/* Clean up. */
- splay_tree_delete (id->decl_map);
+ pointer_map_destroy (id->decl_map);
id->decl_map = st;
- /* The new expression has side-effects if the old one did. */
- TREE_SIDE_EFFECTS (expr) = TREE_SIDE_EFFECTS (t);
-
- tsi_link_before (&id->tsi, expr, TSI_SAME_STMT);
-
/* If the inlined function returns a result that we care about,
- then we're going to need to splice in a MODIFY_EXPR. Otherwise
- the call was a standalone statement and we can just replace it
- with the BIND_EXPR inline representation of the called function. */
- if (!use_retvar || !modify_dest)
- *tsi_stmt_ptr (id->tsi) = build_empty_stmt ();
+ clobber the CALL_EXPR with a reference to the return variable. */
+ if (use_retvar && (TREE_CODE (bsi_stmt (stmt_bsi)) != CALL_EXPR))
+ {
+ *tp = use_retvar;
+ if (gimple_in_ssa_p (cfun))
+ {
+ update_stmt (stmt);
+ mark_symbols_for_renaming (stmt);
+ }
+ maybe_clean_or_replace_eh_stmt (stmt, stmt);
+ }
else
- *tp = use_retvar;
-
- /* When we gimplify a function call, we may clear TREE_SIDE_EFFECTS on
- the call if it is to a "const" function. Thus the copy of
- TREE_SIDE_EFFECTS from the CALL_EXPR to the BIND_EXPR above with
- result in TREE_SIDE_EFFECTS not being set for the inlined copy of a
- "const" function.
+ /* We're modifying a TSI owned by gimple_expand_calls_inline();
+ tsi_delink() will leave the iterator in a sane state. */
+ {
+ /* Handle case of inlining function that miss return statement so
+ return value becomes undefined. */
+ if (TREE_CODE (stmt) == GIMPLE_MODIFY_STMT
+ && TREE_CODE (GIMPLE_STMT_OPERAND (stmt, 0)) == SSA_NAME)
+ {
+ tree name = GIMPLE_STMT_OPERAND (stmt, 0);
+ tree var = SSA_NAME_VAR (GIMPLE_STMT_OPERAND (stmt, 0));
+ tree def = gimple_default_def (cfun, var);
- Unfortunately, that is wrong as inlining the function can create/expose
- interesting side effects (such as setting of a return value).
+ /* If the variable is used undefined, make this name undefined via
+ move. */
+ if (def)
+ {
+ GIMPLE_STMT_OPERAND (stmt, 1) = def;
+ update_stmt (stmt);
+ }
+ /* Otherwise make this variable undefined. */
+ else
+ {
+ bsi_remove (&stmt_bsi, true);
+ set_default_def (var, name);
+ SSA_NAME_DEF_STMT (name) = build_empty_stmt ();
+ }
+ }
+ else
+ bsi_remove (&stmt_bsi, true);
+ }
- The easiest solution is to simply recalculate TREE_SIDE_EFFECTS for
- the toplevel expression. */
- recalculate_side_effects (expr);
+ if (purge_dead_abnormal_edges)
+ tree_purge_dead_abnormal_call_edges (return_block);
- /* Update callgraph if needed. */
- cgraph_remove_node (edge->callee);
+ /* If the value of the new expression is ignored, that's OK. We
+ don't warn about this for CALL_EXPRs, so we shouldn't warn about
+ the equivalent inlined version either. */
+ TREE_USED (*tp) = 1;
- /* Recurse into the body of the just inlined function. */
- expand_calls_inline (inlined_body, id);
- VARRAY_POP (id->fns);
+ /* Output the inlining info for this abstract function, since it has been
+ inlined. If we don't do this now, we can lose the information about the
+ variables in the function when the blocks get blown away as soon as we
+ remove the cgraph node. */
+ (*debug_hooks->outlining_inline_function) (cg_edge->callee->decl);
- /* Don't walk into subtrees. We've already handled them above. */
- *walk_subtrees = 0;
+ /* Update callgraph if needed. */
+ cgraph_remove_node (cg_edge->callee);
- lang_hooks.tree_inlining.end_inlining (fn);
+ id->block = NULL_TREE;
+ successfully_inlined = TRUE;
- /* Keep iterating. */
egress:
input_location = saved_location;
- return NULL_TREE;
+ return successfully_inlined;
}
-static void
-expand_calls_inline (tree *stmt_p, inline_data *id)
+/* Expand call statements reachable from STMT_P.
+ We can only have CALL_EXPRs as the "toplevel" tree code or nested
+ in a GIMPLE_MODIFY_STMT. See tree-gimple.c:get_call_expr_in(). We can
+ unfortunately not use that function here because we need a pointer
+ to the CALL_EXPR, not the tree itself. */
+
+static bool
+gimple_expand_calls_inline (basic_block bb, copy_body_data *id)
{
- tree stmt = *stmt_p;
- enum tree_code code = TREE_CODE (stmt);
- int dummy;
+ block_stmt_iterator bsi;
- switch (code)
+ /* Register specific tree functions. */
+ tree_register_cfg_hooks ();
+ for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi))
{
- case STATEMENT_LIST:
- {
- tree_stmt_iterator i;
- tree new;
+ tree *expr_p = bsi_stmt_ptr (bsi);
+ tree stmt = *expr_p;
+
+ if (TREE_CODE (*expr_p) == GIMPLE_MODIFY_STMT)
+ expr_p = &GIMPLE_STMT_OPERAND (*expr_p, 1);
+ if (TREE_CODE (*expr_p) == WITH_SIZE_EXPR)
+ expr_p = &TREE_OPERAND (*expr_p, 0);
+ if (TREE_CODE (*expr_p) == CALL_EXPR)
+ if (expand_call_inline (bb, stmt, expr_p, id))
+ return true;
+ }
+ return false;
+}
- for (i = tsi_start (stmt); !tsi_end_p (i); )
- {
- id->tsi = i;
- expand_calls_inline (tsi_stmt_ptr (i), id);
+/* Walk all basic blocks created after FIRST and try to fold every statement
+ in the STATEMENTS pointer set. */
+static void
+fold_marked_statements (int first, struct pointer_set_t *statements)
+{
+ for (;first < n_basic_blocks;first++)
+ if (BASIC_BLOCK (first))
+ {
+ block_stmt_iterator bsi;
+ for (bsi = bsi_start (BASIC_BLOCK (first));
+ !bsi_end_p (bsi); bsi_next (&bsi))
+ if (pointer_set_contains (statements, bsi_stmt (bsi)))
+ {
+ tree old_stmt = bsi_stmt (bsi);
+ tree old_call = get_call_expr_in (old_stmt);
- new = tsi_stmt (i);
- if (TREE_CODE (new) == STATEMENT_LIST)
- {
- tsi_link_before (&i, new, TSI_SAME_STMT);
- tsi_delink (&i);
- }
- else
- tsi_next (&i);
- }
+ if (fold_stmt (bsi_stmt_ptr (bsi)))
+ {
+ update_stmt (bsi_stmt (bsi));
+ if (old_call)
+ cgraph_update_edges_for_call_stmt (old_stmt, old_call,
+ bsi_stmt (bsi));
+ if (maybe_clean_or_replace_eh_stmt (old_stmt,
+ bsi_stmt (bsi)))
+ tree_purge_dead_eh_edges (BASIC_BLOCK (first));
+ }
+ }
}
- break;
-
- case COND_EXPR:
- expand_calls_inline (&COND_EXPR_THEN (stmt), id);
- expand_calls_inline (&COND_EXPR_ELSE (stmt), id);
- break;
-
- case CATCH_EXPR:
- expand_calls_inline (&CATCH_BODY (stmt), id);
- break;
-
- case EH_FILTER_EXPR:
- expand_calls_inline (&EH_FILTER_FAILURE (stmt), id);
- break;
-
- case TRY_CATCH_EXPR:
- case TRY_FINALLY_EXPR:
- expand_calls_inline (&TREE_OPERAND (stmt, 0), id);
- expand_calls_inline (&TREE_OPERAND (stmt, 1), id);
- break;
-
- case BIND_EXPR:
- expand_calls_inline (&BIND_EXPR_BODY (stmt), id);
- break;
-
- case COMPOUND_EXPR:
- /* We're gimple. We should have gotten rid of all these. */
- gcc_unreachable ();
-
- case RETURN_EXPR:
- stmt_p = &TREE_OPERAND (stmt, 0);
- stmt = *stmt_p;
- if (!stmt || TREE_CODE (stmt) != MODIFY_EXPR)
- break;
+}
- /* FALLTHRU */
+/* Return true if BB has at least one abnormal outgoing edge. */
- case MODIFY_EXPR:
- stmt_p = &TREE_OPERAND (stmt, 1);
- stmt = *stmt_p;
- if (TREE_CODE (stmt) == WITH_SIZE_EXPR)
- {
- stmt_p = &TREE_OPERAND (stmt, 0);
- stmt = *stmt_p;
- }
- if (TREE_CODE (stmt) != CALL_EXPR)
- break;
+static inline bool
+has_abnormal_outgoing_edge_p (basic_block bb)
+{
+ edge e;
+ edge_iterator ei;
- /* FALLTHRU */
+ FOR_EACH_EDGE (e, ei, bb->succs)
+ if (e->flags & EDGE_ABNORMAL)
+ return true;
- case CALL_EXPR:
- expand_call_inline (stmt_p, &dummy, id);
- break;
-
- default:
- break;
- }
+ return false;
}
/* Expand calls to inline functions in the body of FN. */
-void
+unsigned int
optimize_inline_calls (tree fn)
{
- inline_data id;
+ copy_body_data id;
tree prev_fn;
- tree ifn;
-
+ basic_block bb;
+ int last = n_basic_blocks;
/* There is no point in performing inlining if errors have already
occurred -- and we might crash if we try to inline invalid
code. */
if (errorcount || sorrycount)
- return;
+ return 0;
/* Clear out ID. */
memset (&id, 0, sizeof (id));
- id.current_node = id.node = cgraph_node (fn);
- /* Don't allow recursion into FN. */
- VARRAY_TREE_INIT (id.fns, 32, "fns");
- VARRAY_PUSH_TREE (id.fns, fn);
+ id.src_node = id.dst_node = cgraph_node (fn);
+ id.dst_fn = fn;
/* Or any functions that aren't finished yet. */
prev_fn = NULL_TREE;
if (current_function_decl)
{
- VARRAY_PUSH_TREE (id.fns, current_function_decl);
+ id.dst_fn = current_function_decl;
prev_fn = current_function_decl;
}
- prev_fn = lang_hooks.tree_inlining.add_pending_fn_decls (&id.fns, prev_fn);
+ id.copy_decl = copy_decl_maybe_to_var;
+ id.transform_call_graph_edges = CB_CGE_DUPLICATE;
+ id.transform_new_cfg = false;
+ id.transform_return_to_modify = true;
+ id.transform_lang_insert_block = NULL;
+ id.statements_to_fold = pointer_set_create ();
- /* Create the list of functions this call will inline. */
- VARRAY_TREE_INIT (id.inlined_fns, 32, "inlined_fns");
+ push_gimplify_context ();
- /* Keep track of the low-water mark, i.e., the point where the first
- real inlining is represented in ID.FNS. */
- id.first_inlined_fn = VARRAY_ACTIVE_SIZE (id.fns);
+ /* We make no attempts to keep dominance info up-to-date. */
+ free_dominance_info (CDI_DOMINATORS);
+ free_dominance_info (CDI_POST_DOMINATORS);
- /* Replace all calls to inline functions with the bodies of those
- functions. */
- id.tree_pruner = htab_create (37, htab_hash_pointer, htab_eq_pointer, NULL);
- expand_calls_inline (&DECL_SAVED_TREE (fn), &id);
+ /* Reach the trees by walking over the CFG, and note the
+ enclosing basic-blocks in the call edges. */
+ /* We walk the blocks going forward, because inlined function bodies
+ will split id->current_basic_block, and the new blocks will
+ follow it; we'll trudge through them, processing their CALL_EXPRs
+ along the way. */
+ FOR_EACH_BB (bb)
+ gimple_expand_calls_inline (bb, &id);
- /* Clean up. */
- htab_delete (id.tree_pruner);
- ifn = make_tree_vec (VARRAY_ACTIVE_SIZE (id.inlined_fns));
- if (VARRAY_ACTIVE_SIZE (id.inlined_fns))
- memcpy (&TREE_VEC_ELT (ifn, 0), &VARRAY_TREE (id.inlined_fns, 0),
- VARRAY_ACTIVE_SIZE (id.inlined_fns) * sizeof (tree));
- DECL_INLINED_FNS (fn) = ifn;
+ pop_gimplify_context (NULL);
#ifdef ENABLE_CHECKING
{
struct cgraph_edge *e;
- verify_cgraph_node (id.node);
+ verify_cgraph_node (id.dst_node);
/* Double check that we inlined everything we are supposed to inline. */
- for (e = id.node->callees; e; e = e->next_callee)
+ for (e = id.dst_node->callees; e; e = e->next_callee)
gcc_assert (e->inline_failed);
}
#endif
-}
-
-/* FN is a function that has a complete body, and CLONE is a function whose
- body is to be set to a copy of FN, mapping argument declarations according
- to the ARG_MAP splay_tree. */
-
-void
-clone_body (tree clone, tree fn, void *arg_map)
-{
- inline_data id;
-
- /* Clone the body, as if we were making an inline call. But, remap the
- parameters in the callee to the parameters of caller. If there's an
- in-charge parameter, map it to an appropriate constant. */
- memset (&id, 0, sizeof (id));
- VARRAY_TREE_INIT (id.fns, 2, "fns");
- VARRAY_PUSH_TREE (id.fns, clone);
- VARRAY_PUSH_TREE (id.fns, fn);
- id.decl_map = (splay_tree)arg_map;
-
- /* Cloning is treated slightly differently from inlining. Set
- CLONING_P so that it's clear which operation we're performing. */
- id.cloning_p = true;
-
- /* Actually copy the body. */
- append_to_statement_list_force (copy_body (&id), &DECL_SAVED_TREE (clone));
-}
-
-/* Make and return duplicate of body in FN. Put copies of DECL_ARGUMENTS
- in *arg_copy and of the static chain, if any, in *sc_copy. */
-
-tree
-save_body (tree fn, tree *arg_copy, tree *sc_copy)
-{
- inline_data id;
- tree body, *parg;
-
- memset (&id, 0, sizeof (id));
- VARRAY_TREE_INIT (id.fns, 1, "fns");
- VARRAY_PUSH_TREE (id.fns, fn);
- id.node = cgraph_node (fn);
- id.saving_p = true;
- id.decl_map = splay_tree_new (splay_tree_compare_pointers, NULL, NULL);
- *arg_copy = DECL_ARGUMENTS (fn);
-
- for (parg = arg_copy; *parg; parg = &TREE_CHAIN (*parg))
- {
- tree new = copy_node (*parg);
-
- lang_hooks.dup_lang_specific_decl (new);
- DECL_ABSTRACT_ORIGIN (new) = DECL_ORIGIN (*parg);
- insert_decl_map (&id, *parg, new);
- TREE_CHAIN (new) = TREE_CHAIN (*parg);
- *parg = new;
- }
-
- *sc_copy = DECL_STRUCT_FUNCTION (fn)->static_chain_decl;
- if (*sc_copy)
- {
- tree new = copy_node (*sc_copy);
-
- lang_hooks.dup_lang_specific_decl (new);
- DECL_ABSTRACT_ORIGIN (new) = DECL_ORIGIN (*sc_copy);
- insert_decl_map (&id, *sc_copy, new);
- TREE_CHAIN (new) = TREE_CHAIN (*sc_copy);
- *sc_copy = new;
- }
-
- insert_decl_map (&id, DECL_RESULT (fn), DECL_RESULT (fn));
-
- /* Actually copy the body. */
- body = copy_body (&id);
-
- /* Clean up. */
- splay_tree_delete (id.decl_map);
- return body;
-}
-
-#define WALK_SUBTREE(NODE) \
- do \
- { \
- result = walk_tree (&(NODE), func, data, pset); \
- if (result) \
- return result; \
- } \
- while (0)
-
-/* This is a subroutine of walk_tree that walks field of TYPE that are to
- be walked whenever a type is seen in the tree. Rest of operands and return
- value are as for walk_tree. */
-
-static tree
-walk_type_fields (tree type, walk_tree_fn func, void *data,
- struct pointer_set_t *pset)
-{
- tree result = NULL_TREE;
-
- switch (TREE_CODE (type))
- {
- case POINTER_TYPE:
- case REFERENCE_TYPE:
- /* We have to worry about mutually recursive pointers. These can't
- be written in C. They can in Ada. It's pathological, but
- there's an ACATS test (c38102a) that checks it. Deal with this
- by checking if we're pointing to another pointer, that one
- points to another pointer, that one does too, and we have no htab.
- If so, get a hash table. We check three levels deep to avoid
- the cost of the hash table if we don't need one. */
- if (POINTER_TYPE_P (TREE_TYPE (type))
- && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (type)))
- && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (TREE_TYPE (type))))
- && !pset)
- {
- result = walk_tree_without_duplicates (&TREE_TYPE (type),
- func, data);
- if (result)
- return result;
-
- break;
- }
-
- /* ... fall through ... */
-
- case COMPLEX_TYPE:
- WALK_SUBTREE (TREE_TYPE (type));
- break;
-
- case METHOD_TYPE:
- WALK_SUBTREE (TYPE_METHOD_BASETYPE (type));
-
- /* Fall through. */
-
- case FUNCTION_TYPE:
- WALK_SUBTREE (TREE_TYPE (type));
- {
- tree arg;
-
- /* We never want to walk into default arguments. */
- for (arg = TYPE_ARG_TYPES (type); arg; arg = TREE_CHAIN (arg))
- WALK_SUBTREE (TREE_VALUE (arg));
- }
- break;
-
- case ARRAY_TYPE:
- /* Don't follow this nodes's type if a pointer for fear that we'll
- have infinite recursion. Those types are uninteresting anyway. */
- if (!POINTER_TYPE_P (TREE_TYPE (type))
- && TREE_CODE (TREE_TYPE (type)) != OFFSET_TYPE)
- WALK_SUBTREE (TREE_TYPE (type));
- WALK_SUBTREE (TYPE_DOMAIN (type));
- break;
-
- case BOOLEAN_TYPE:
- case ENUMERAL_TYPE:
- case INTEGER_TYPE:
- case CHAR_TYPE:
- case REAL_TYPE:
- WALK_SUBTREE (TYPE_MIN_VALUE (type));
- WALK_SUBTREE (TYPE_MAX_VALUE (type));
- break;
-
- case OFFSET_TYPE:
- WALK_SUBTREE (TREE_TYPE (type));
- WALK_SUBTREE (TYPE_OFFSET_BASETYPE (type));
- break;
-
- default:
- break;
- }
-
- return NULL_TREE;
-}
-
-/* Apply FUNC to all the sub-trees of TP in a pre-order traversal. FUNC is
- called with the DATA and the address of each sub-tree. If FUNC returns a
- non-NULL value, the traversal is aborted, and the value returned by FUNC
- is returned. If PSET is non-NULL it is used to record the nodes visited,
- and to avoid visiting a node more than once. */
-
-tree
-walk_tree (tree *tp, walk_tree_fn func, void *data, struct pointer_set_t *pset)
-{
- enum tree_code code;
- int walk_subtrees;
- tree result;
-
-#define WALK_SUBTREE_TAIL(NODE) \
- do \
- { \
- tp = & (NODE); \
- goto tail_recurse; \
- } \
- while (0)
-
- tail_recurse:
- /* Skip empty subtrees. */
- if (!*tp)
- return NULL_TREE;
-
- /* Don't walk the same tree twice, if the user has requested
- that we avoid doing so. */
- if (pset && pointer_set_insert (pset, *tp))
- return NULL_TREE;
-
- /* Call the function. */
- walk_subtrees = 1;
- result = (*func) (tp, &walk_subtrees, data);
-
- /* If we found something, return it. */
- if (result)
- return result;
-
- code = TREE_CODE (*tp);
-
- /* Even if we didn't, FUNC may have decided that there was nothing
- interesting below this point in the tree. */
- if (!walk_subtrees)
- {
- if (code == TREE_LIST)
- /* But we still need to check our siblings. */
- WALK_SUBTREE_TAIL (TREE_CHAIN (*tp));
- else
- return NULL_TREE;
- }
-
- result = lang_hooks.tree_inlining.walk_subtrees (tp, &walk_subtrees, func,
- data, pset);
- if (result || ! walk_subtrees)
- return result;
-
- /* If this is a DECL_EXPR, walk into various fields of the type that it's
- defining. We only want to walk into these fields of a type in this
- case. Note that decls get walked as part of the processing of a
- BIND_EXPR.
-
- ??? Precisely which fields of types that we are supposed to walk in
- this case vs. the normal case aren't well defined. */
- if (code == DECL_EXPR
- && TREE_CODE (DECL_EXPR_DECL (*tp)) == TYPE_DECL
- && TREE_CODE (TREE_TYPE (DECL_EXPR_DECL (*tp))) != ERROR_MARK)
- {
- tree *type_p = &TREE_TYPE (DECL_EXPR_DECL (*tp));
-
- /* Call the function for the type. See if it returns anything or
- doesn't want us to continue. If we are to continue, walk both
- the normal fields and those for the declaration case. */
- result = (*func) (type_p, &walk_subtrees, data);
- if (result || !walk_subtrees)
- return NULL_TREE;
-
- result = walk_type_fields (*type_p, func, data, pset);
- if (result)
- return result;
-
- WALK_SUBTREE (TYPE_SIZE (*type_p));
- WALK_SUBTREE (TYPE_SIZE_UNIT (*type_p));
-
- /* If this is a record type, also walk the fields. */
- if (TREE_CODE (*type_p) == RECORD_TYPE
- || TREE_CODE (*type_p) == UNION_TYPE
- || TREE_CODE (*type_p) == QUAL_UNION_TYPE)
- {
- tree field;
-
- for (field = TYPE_FIELDS (*type_p); field;
- field = TREE_CHAIN (field))
- {
- /* We'd like to look at the type of the field, but we can easily
- get infinite recursion. So assume it's pointed to elsewhere
- in the tree. Also, ignore things that aren't fields. */
- if (TREE_CODE (field) != FIELD_DECL)
- continue;
-
- WALK_SUBTREE (DECL_FIELD_OFFSET (field));
- WALK_SUBTREE (DECL_SIZE (field));
- WALK_SUBTREE (DECL_SIZE_UNIT (field));
- if (TREE_CODE (*type_p) == QUAL_UNION_TYPE)
- WALK_SUBTREE (DECL_QUALIFIER (field));
- }
- }
- }
-
- else if (code != SAVE_EXPR
- && code != BIND_EXPR
- && IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code)))
- {
- int i, len;
-
- /* Walk over all the sub-trees of this operand. */
- len = TREE_CODE_LENGTH (code);
- /* TARGET_EXPRs are peculiar: operands 1 and 3 can be the same.
- But, we only want to walk once. */
- if (code == TARGET_EXPR
- && TREE_OPERAND (*tp, 3) == TREE_OPERAND (*tp, 1))
- --len;
-
- /* Go through the subtrees. We need to do this in forward order so
- that the scope of a FOR_EXPR is handled properly. */
-#ifdef DEBUG_WALK_TREE
- for (i = 0; i < len; ++i)
- WALK_SUBTREE (TREE_OPERAND (*tp, i));
-#else
- for (i = 0; i < len - 1; ++i)
- WALK_SUBTREE (TREE_OPERAND (*tp, i));
-
- if (len)
- {
- /* The common case is that we may tail recurse here. */
- if (code != BIND_EXPR
- && !TREE_CHAIN (*tp))
- WALK_SUBTREE_TAIL (TREE_OPERAND (*tp, len - 1));
- else
- WALK_SUBTREE (TREE_OPERAND (*tp, len - 1));
- }
-#endif
- }
-
- /* If this is a type, walk the needed fields in the type. */
- else if (TYPE_P (*tp))
- {
- result = walk_type_fields (*tp, func, data, pset);
- if (result)
- return result;
- }
- else
- {
- /* Not one of the easy cases. We must explicitly go through the
- children. */
- switch (code)
- {
- case ERROR_MARK:
- case IDENTIFIER_NODE:
- case INTEGER_CST:
- case REAL_CST:
- case VECTOR_CST:
- case STRING_CST:
- case BLOCK:
- case PLACEHOLDER_EXPR:
- case SSA_NAME:
- case FIELD_DECL:
- case RESULT_DECL:
- /* None of thse have subtrees other than those already walked
- above. */
- break;
-
- case TREE_LIST:
- WALK_SUBTREE (TREE_VALUE (*tp));
- WALK_SUBTREE_TAIL (TREE_CHAIN (*tp));
- break;
-
- case TREE_VEC:
- {
- int len = TREE_VEC_LENGTH (*tp);
-
- if (len == 0)
- break;
-
- /* Walk all elements but the first. */
- while (--len)
- WALK_SUBTREE (TREE_VEC_ELT (*tp, len));
-
- /* Now walk the first one as a tail call. */
- WALK_SUBTREE_TAIL (TREE_VEC_ELT (*tp, 0));
- }
-
- case COMPLEX_CST:
- WALK_SUBTREE (TREE_REALPART (*tp));
- WALK_SUBTREE_TAIL (TREE_IMAGPART (*tp));
-
- case CONSTRUCTOR:
- WALK_SUBTREE_TAIL (CONSTRUCTOR_ELTS (*tp));
-
- case SAVE_EXPR:
- WALK_SUBTREE_TAIL (TREE_OPERAND (*tp, 0));
-
- case BIND_EXPR:
- {
- tree decl;
- for (decl = BIND_EXPR_VARS (*tp); decl; decl = TREE_CHAIN (decl))
- {
- /* Walk the DECL_INITIAL and DECL_SIZE. We don't want to walk
- into declarations that are just mentioned, rather than
- declared; they don't really belong to this part of the tree.
- And, we can see cycles: the initializer for a declaration
- can refer to the declaration itself. */
- WALK_SUBTREE (DECL_INITIAL (decl));
- WALK_SUBTREE (DECL_SIZE (decl));
- WALK_SUBTREE (DECL_SIZE_UNIT (decl));
- }
- WALK_SUBTREE_TAIL (BIND_EXPR_BODY (*tp));
- }
-
- case STATEMENT_LIST:
- {
- tree_stmt_iterator i;
- for (i = tsi_start (*tp); !tsi_end_p (i); tsi_next (&i))
- WALK_SUBTREE (*tsi_stmt_ptr (i));
- }
- break;
-
- default:
- /* ??? This could be a language-defined node. We really should make
- a hook for it, but right now just ignore it. */
- break;
- }
- }
-
- /* We didn't find what we were looking for. */
- return NULL_TREE;
-
-#undef WALK_SUBTREE
-#undef WALK_SUBTREE_TAIL
-}
-
-/* Like walk_tree, but does not walk duplicate nodes more than once. */
-
-tree
-walk_tree_without_duplicates (tree *tp, walk_tree_fn func, void *data)
-{
- tree result;
- struct pointer_set_t *pset;
-
- pset = pointer_set_create ();
- result = walk_tree (tp, func, data, pset);
- pointer_set_destroy (pset);
- return result;
+
+ /* Fold the statements before compacting/renumbering the basic blocks. */
+ fold_marked_statements (last, id.statements_to_fold);
+ pointer_set_destroy (id.statements_to_fold);
+
+ /* Renumber the (code) basic_blocks consecutively. */
+ compact_blocks ();
+ /* Renumber the lexical scoping (non-code) blocks consecutively. */
+ number_blocks (fn);
+
+ /* We are not going to maintain the cgraph edges up to date.
+ Kill it so it won't confuse us. */
+ cgraph_node_remove_callees (id.dst_node);
+
+ fold_cond_expr_cond ();
+ /* It would be nice to check SSA/CFG/statement consistency here, but it is
+ not possible yet - the IPA passes might make various functions to not
+ throw and they don't care to proactively update local EH info. This is
+ done later in fixup_cfg pass that also execute the verification. */
+ return (TODO_update_ssa | TODO_cleanup_cfg
+ | (gimple_in_ssa_p (cfun) ? TODO_remove_unused_locals : 0)
+ | (profile_status != PROFILE_ABSENT ? TODO_rebuild_frequencies : 0));
}
/* Passed to walk_tree. Copies the node pointed to, if appropriate. */
copy_tree_r (tree *tp, int *walk_subtrees, void *data ATTRIBUTE_UNUSED)
{
enum tree_code code = TREE_CODE (*tp);
+ enum tree_code_class cl = TREE_CODE_CLASS (code);
/* We make copies of most nodes. */
- if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code))
+ if (IS_EXPR_CODE_CLASS (cl)
+ || IS_GIMPLE_STMT_CODE_CLASS (cl)
|| code == TREE_LIST
|| code == TREE_VEC
- || code == TYPE_DECL)
+ || code == TYPE_DECL
+ || code == OMP_CLAUSE)
{
/* Because the chain gets clobbered when we make a copy, we save it
here. */
- tree chain = TREE_CHAIN (*tp);
- tree new;
+ tree chain = NULL_TREE, new;
+
+ if (!GIMPLE_TUPLE_P (*tp))
+ chain = TREE_CHAIN (*tp);
/* Copy the node. */
new = copy_node (*tp);
/* Now, restore the chain, if appropriate. That will cause
walk_tree to walk into the chain as well. */
- if (code == PARM_DECL || code == TREE_LIST)
+ if (code == PARM_DECL
+ || code == TREE_LIST
+ || code == OMP_CLAUSE)
TREE_CHAIN (*tp) = chain;
/* For now, we don't update BLOCKs when we make copies. So, we
if (TREE_CODE (*tp) == BIND_EXPR)
BIND_EXPR_BLOCK (*tp) = NULL_TREE;
}
+ else if (code == CONSTRUCTOR)
+ {
+ /* CONSTRUCTOR nodes need special handling because
+ we need to duplicate the vector of elements. */
+ tree new;
+
+ new = copy_node (*tp);
+
+ /* Propagate mudflap marked-ness. */
+ if (flag_mudflap && mf_marked_p (*tp))
+ mf_mark (new);
+ CONSTRUCTOR_ELTS (new) = VEC_copy (constructor_elt, gc,
+ CONSTRUCTOR_ELTS (*tp));
+ *tp = new;
+ }
else if (TREE_CODE_CLASS (code) == tcc_type)
*walk_subtrees = 0;
else if (TREE_CODE_CLASS (code) == tcc_declaration)
/* The SAVE_EXPR pointed to by TP is being copied. If ST contains
information indicating to what new SAVE_EXPR this one should be mapped,
- use that one. Otherwise, create a new node and enter it in ST. */
+ use that one. Otherwise, create a new node and enter it in ST. FN is
+ the function into which the copy will be placed. */
static void
remap_save_expr (tree *tp, void *st_, int *walk_subtrees)
{
- splay_tree st = (splay_tree) st_;
- splay_tree_node n;
+ struct pointer_map_t *st = (struct pointer_map_t *) st_;
+ tree *n;
tree t;
/* See if we already encountered this SAVE_EXPR. */
- n = splay_tree_lookup (st, (splay_tree_key) *tp);
+ n = (tree *) pointer_map_contains (st, *tp);
/* If we didn't already remap this SAVE_EXPR, do so now. */
if (!n)
t = copy_node (*tp);
/* Remember this SAVE_EXPR. */
- splay_tree_insert (st, (splay_tree_key) *tp, (splay_tree_value) t);
+ *pointer_map_insert (st, *tp) = t;
/* Make sure we don't remap an already-remapped SAVE_EXPR. */
- splay_tree_insert (st, (splay_tree_key) t, (splay_tree_value) t);
+ *pointer_map_insert (st, t) = t;
}
else
{
/* We've already walked into this SAVE_EXPR; don't do it again. */
*walk_subtrees = 0;
- t = (tree) n->value;
+ t = *n;
}
/* Replace this SAVE_EXPR with the copy. */
/* Called via walk_tree. If *TP points to a DECL_STMT for a local label,
copies the declaration and enters it in the splay_tree in DATA (which is
- really an `inline_data *'). */
+ really an `copy_body_data *'). */
static tree
mark_local_for_remap_r (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED,
void *data)
{
- inline_data *id = (inline_data *) data;
+ copy_body_data *id = (copy_body_data *) data;
/* Don't walk into types. */
if (TYPE_P (*tp))
tree decl = TREE_OPERAND (*tp, 0);
/* Copy the decl and remember the copy. */
- insert_decl_map (id, decl,
- copy_decl_for_inlining (decl, DECL_CONTEXT (decl),
- DECL_CONTEXT (decl)));
+ insert_decl_map (id, decl, id->copy_decl (decl, id));
}
return NULL_TREE;
static tree
unsave_r (tree *tp, int *walk_subtrees, void *data)
{
- inline_data *id = (inline_data *) data;
- splay_tree st = id->decl_map;
- splay_tree_node n;
+ copy_body_data *id = (copy_body_data *) data;
+ struct pointer_map_t *st = id->decl_map;
+ tree *n;
/* Only a local declaration (variable or label). */
if ((TREE_CODE (*tp) == VAR_DECL && !TREE_STATIC (*tp))
|| TREE_CODE (*tp) == LABEL_DECL)
{
/* Lookup the declaration. */
- n = splay_tree_lookup (st, (splay_tree_key) *tp);
+ n = (tree *) pointer_map_contains (st, *tp);
/* If it's there, remap it. */
if (n)
- *tp = (tree) n->value;
+ *tp = *n;
}
else if (TREE_CODE (*tp) == STATEMENT_LIST)
tree
unsave_expr_now (tree expr)
{
- inline_data id;
+ copy_body_data id;
/* There's nothing to do for NULL_TREE. */
if (expr == 0)
/* Set up ID. */
memset (&id, 0, sizeof (id));
- VARRAY_TREE_INIT (id.fns, 1, "fns");
- VARRAY_PUSH_TREE (id.fns, current_function_decl);
- id.decl_map = splay_tree_new (splay_tree_compare_pointers, NULL, NULL);
+ id.src_fn = current_function_decl;
+ id.dst_fn = current_function_decl;
+ id.decl_map = pointer_map_create ();
+
+ id.copy_decl = copy_decl_no_change;
+ id.transform_call_graph_edges = CB_CGE_DUPLICATE;
+ id.transform_new_cfg = false;
+ id.transform_return_to_modify = false;
+ id.transform_lang_insert_block = NULL;
/* Walk the tree once to find local labels. */
walk_tree_without_duplicates (&expr, mark_local_for_remap_r, &id);
walk_tree (&expr, unsave_r, &id, NULL);
/* Clean up. */
- splay_tree_delete (id.decl_map);
+ pointer_map_destroy (id.decl_map);
return expr;
}
return walk_tree_without_duplicates (&top, debug_find_tree_1, search) != 0;
}
+
/* Declare the variables created by the inliner. Add all the variables in
VARS to BIND_EXPR. */
static void
-declare_inline_vars (tree bind_expr, tree vars)
+declare_inline_vars (tree block, tree vars)
{
tree t;
for (t = vars; t; t = TREE_CHAIN (t))
- DECL_SEEN_IN_BIND_EXPR_P (t) = 1;
+ {
+ DECL_SEEN_IN_BIND_EXPR_P (t) = 1;
+ gcc_assert (!TREE_STATIC (t) && !TREE_ASM_WRITTEN (t));
+ cfun->local_decls = tree_cons (NULL_TREE, t, cfun->local_decls);
+ }
+
+ if (block)
+ BLOCK_VARS (block) = chainon (BLOCK_VARS (block), vars);
+}
+
+
+/* Copy NODE (which must be a DECL). The DECL originally was in the FROM_FN,
+ but now it will be in the TO_FN. PARM_TO_VAR means enable PARM_DECL to
+ VAR_DECL translation. */
+
+static tree
+copy_decl_for_dup_finish (copy_body_data *id, tree decl, tree copy)
+{
+ /* Don't generate debug information for the copy if we wouldn't have
+ generated it for the copy either. */
+ DECL_ARTIFICIAL (copy) = DECL_ARTIFICIAL (decl);
+ DECL_IGNORED_P (copy) = DECL_IGNORED_P (decl);
+
+ /* Set the DECL_ABSTRACT_ORIGIN so the debugging routines know what
+ declaration inspired this copy. */
+ DECL_ABSTRACT_ORIGIN (copy) = DECL_ORIGIN (decl);
+
+ /* The new variable/label has no RTL, yet. */
+ if (CODE_CONTAINS_STRUCT (TREE_CODE (copy), TS_DECL_WRTL)
+ && !TREE_STATIC (copy) && !DECL_EXTERNAL (copy))
+ SET_DECL_RTL (copy, NULL_RTX);
+
+ /* These args would always appear unused, if not for this. */
+ TREE_USED (copy) = 1;
+
+ /* Set the context for the new declaration. */
+ if (!DECL_CONTEXT (decl))
+ /* Globals stay global. */
+ ;
+ else if (DECL_CONTEXT (decl) != id->src_fn)
+ /* Things that weren't in the scope of the function we're inlining
+ from aren't in the scope we're inlining to, either. */
+ ;
+ else if (TREE_STATIC (decl))
+ /* Function-scoped static variables should stay in the original
+ function. */
+ ;
+ else
+ /* Ordinary automatic local variables are now in the scope of the
+ new function. */
+ DECL_CONTEXT (copy) = id->dst_fn;
+
+ return copy;
+}
+
+static tree
+copy_decl_to_var (tree decl, copy_body_data *id)
+{
+ tree copy, type;
+
+ gcc_assert (TREE_CODE (decl) == PARM_DECL
+ || TREE_CODE (decl) == RESULT_DECL);
+
+ type = TREE_TYPE (decl);
+
+ copy = build_decl (VAR_DECL, DECL_NAME (decl), type);
+ TREE_ADDRESSABLE (copy) = TREE_ADDRESSABLE (decl);
+ TREE_READONLY (copy) = TREE_READONLY (decl);
+ TREE_THIS_VOLATILE (copy) = TREE_THIS_VOLATILE (decl);
+ DECL_GIMPLE_REG_P (copy) = DECL_GIMPLE_REG_P (decl);
+ DECL_NO_TBAA_P (copy) = DECL_NO_TBAA_P (decl);
+
+ return copy_decl_for_dup_finish (id, decl, copy);
+}
+
+/* Like copy_decl_to_var, but create a return slot object instead of a
+ pointer variable for return by invisible reference. */
+
+static tree
+copy_result_decl_to_var (tree decl, copy_body_data *id)
+{
+ tree copy, type;
+
+ gcc_assert (TREE_CODE (decl) == PARM_DECL
+ || TREE_CODE (decl) == RESULT_DECL);
+
+ type = TREE_TYPE (decl);
+ if (DECL_BY_REFERENCE (decl))
+ type = TREE_TYPE (type);
+
+ copy = build_decl (VAR_DECL, DECL_NAME (decl), type);
+ TREE_READONLY (copy) = TREE_READONLY (decl);
+ TREE_THIS_VOLATILE (copy) = TREE_THIS_VOLATILE (decl);
+ if (!DECL_BY_REFERENCE (decl))
+ {
+ TREE_ADDRESSABLE (copy) = TREE_ADDRESSABLE (decl);
+ DECL_GIMPLE_REG_P (copy) = DECL_GIMPLE_REG_P (decl);
+ DECL_NO_TBAA_P (copy) = DECL_NO_TBAA_P (decl);
+ }
+
+ return copy_decl_for_dup_finish (id, decl, copy);
+}
+
+
+tree
+copy_decl_no_change (tree decl, copy_body_data *id)
+{
+ tree copy;
+
+ copy = copy_node (decl);
+
+ /* The COPY is not abstract; it will be generated in DST_FN. */
+ DECL_ABSTRACT (copy) = 0;
+ lang_hooks.dup_lang_specific_decl (copy);
+
+ /* TREE_ADDRESSABLE isn't used to indicate that a label's address has
+ been taken; it's for internal bookkeeping in expand_goto_internal. */
+ if (TREE_CODE (copy) == LABEL_DECL)
+ {
+ TREE_ADDRESSABLE (copy) = 0;
+ LABEL_DECL_UID (copy) = -1;
+ }
+
+ return copy_decl_for_dup_finish (id, decl, copy);
+}
+
+static tree
+copy_decl_maybe_to_var (tree decl, copy_body_data *id)
+{
+ if (TREE_CODE (decl) == PARM_DECL || TREE_CODE (decl) == RESULT_DECL)
+ return copy_decl_to_var (decl, id);
+ else
+ return copy_decl_no_change (decl, id);
+}
+
+/* Return a copy of the function's argument tree. */
+static tree
+copy_arguments_for_versioning (tree orig_parm, copy_body_data * id)
+{
+ tree *arg_copy, *parg;
+
+ arg_copy = &orig_parm;
+ for (parg = arg_copy; *parg; parg = &TREE_CHAIN (*parg))
+ {
+ tree new = remap_decl (*parg, id);
+ lang_hooks.dup_lang_specific_decl (new);
+ TREE_CHAIN (new) = TREE_CHAIN (*parg);
+ *parg = new;
+ }
+ return orig_parm;
+}
+
+/* Return a copy of the function's static chain. */
+static tree
+copy_static_chain (tree static_chain, copy_body_data * id)
+{
+ tree *chain_copy, *pvar;
+
+ chain_copy = &static_chain;
+ for (pvar = chain_copy; *pvar; pvar = &TREE_CHAIN (*pvar))
+ {
+ tree new = remap_decl (*pvar, id);
+ lang_hooks.dup_lang_specific_decl (new);
+ TREE_CHAIN (new) = TREE_CHAIN (*pvar);
+ *pvar = new;
+ }
+ return static_chain;
+}
+
+/* Return true if the function is allowed to be versioned.
+ This is a guard for the versioning functionality. */
+bool
+tree_versionable_function_p (tree fndecl)
+{
+ if (fndecl == NULL_TREE)
+ return false;
+ /* ??? There are cases where a function is
+ uninlinable but can be versioned. */
+ if (!tree_inlinable_function_p (fndecl))
+ return false;
+
+ return true;
+}
+
+/* Create a copy of a function's tree.
+ OLD_DECL and NEW_DECL are FUNCTION_DECL tree nodes
+ of the original function and the new copied function
+ respectively. In case we want to replace a DECL
+ tree with another tree while duplicating the function's
+ body, TREE_MAP represents the mapping between these
+ trees. If UPDATE_CLONES is set, the call_stmt fields
+ of edges of clones of the function will be updated. */
+void
+tree_function_versioning (tree old_decl, tree new_decl, varray_type tree_map,
+ bool update_clones)
+{
+ struct cgraph_node *old_version_node;
+ struct cgraph_node *new_version_node;
+ copy_body_data id;
+ tree p;
+ unsigned i;
+ struct ipa_replace_map *replace_info;
+ basic_block old_entry_block;
+ tree t_step;
+ tree old_current_function_decl = current_function_decl;
+
+ gcc_assert (TREE_CODE (old_decl) == FUNCTION_DECL
+ && TREE_CODE (new_decl) == FUNCTION_DECL);
+ DECL_POSSIBLY_INLINED (old_decl) = 1;
+
+ old_version_node = cgraph_node (old_decl);
+ new_version_node = cgraph_node (new_decl);
+
+ DECL_ARTIFICIAL (new_decl) = 1;
+ DECL_ABSTRACT_ORIGIN (new_decl) = DECL_ORIGIN (old_decl);
+
+ /* Prepare the data structures for the tree copy. */
+ memset (&id, 0, sizeof (id));
+
+ /* Generate a new name for the new version. */
+ if (!update_clones)
+ {
+ DECL_NAME (new_decl) = create_tmp_var_name (NULL);
+ SET_DECL_ASSEMBLER_NAME (new_decl, DECL_NAME (new_decl));
+ SET_DECL_RTL (new_decl, NULL_RTX);
+ id.statements_to_fold = pointer_set_create ();
+ }
+
+ id.decl_map = pointer_map_create ();
+ id.src_fn = old_decl;
+ id.dst_fn = new_decl;
+ id.src_node = old_version_node;
+ id.dst_node = new_version_node;
+ id.src_cfun = DECL_STRUCT_FUNCTION (old_decl);
+
+ id.copy_decl = copy_decl_no_change;
+ id.transform_call_graph_edges
+ = update_clones ? CB_CGE_MOVE_CLONES : CB_CGE_MOVE;
+ id.transform_new_cfg = true;
+ id.transform_return_to_modify = false;
+ id.transform_lang_insert_block = NULL;
+
+ current_function_decl = new_decl;
+ old_entry_block = ENTRY_BLOCK_PTR_FOR_FUNCTION
+ (DECL_STRUCT_FUNCTION (old_decl));
+ initialize_cfun (new_decl, old_decl,
+ old_entry_block->count,
+ old_entry_block->frequency);
+ push_cfun (DECL_STRUCT_FUNCTION (new_decl));
+
+ /* Copy the function's static chain. */
+ p = DECL_STRUCT_FUNCTION (old_decl)->static_chain_decl;
+ if (p)
+ DECL_STRUCT_FUNCTION (new_decl)->static_chain_decl =
+ copy_static_chain (DECL_STRUCT_FUNCTION (old_decl)->static_chain_decl,
+ &id);
+ /* Copy the function's arguments. */
+ if (DECL_ARGUMENTS (old_decl) != NULL_TREE)
+ DECL_ARGUMENTS (new_decl) =
+ copy_arguments_for_versioning (DECL_ARGUMENTS (old_decl), &id);
+
+ /* If there's a tree_map, prepare for substitution. */
+ if (tree_map)
+ for (i = 0; i < VARRAY_ACTIVE_SIZE (tree_map); i++)
+ {
+ replace_info = VARRAY_GENERIC_PTR (tree_map, i);
+ if (replace_info->replace_p)
+ insert_decl_map (&id, replace_info->old_tree,
+ replace_info->new_tree);
+ }
+
+ DECL_INITIAL (new_decl) = remap_blocks (DECL_INITIAL (id.src_fn), &id);
+
+ /* Renumber the lexical scoping (non-code) blocks consecutively. */
+ number_blocks (id.dst_fn);
+
+ if (DECL_STRUCT_FUNCTION (old_decl)->local_decls != NULL_TREE)
+ /* Add local vars. */
+ for (t_step = DECL_STRUCT_FUNCTION (old_decl)->local_decls;
+ t_step; t_step = TREE_CHAIN (t_step))
+ {
+ tree var = TREE_VALUE (t_step);
+ if (TREE_STATIC (var) && !TREE_ASM_WRITTEN (var))
+ cfun->local_decls = tree_cons (NULL_TREE, var, cfun->local_decls);
+ else
+ cfun->local_decls =
+ tree_cons (NULL_TREE, remap_decl (var, &id),
+ cfun->local_decls);
+ }
+
+ /* Copy the Function's body. */
+ copy_body (&id, old_entry_block->count, old_entry_block->frequency, ENTRY_BLOCK_PTR, EXIT_BLOCK_PTR);
+
+ if (DECL_RESULT (old_decl) != NULL_TREE)
+ {
+ tree *res_decl = &DECL_RESULT (old_decl);
+ DECL_RESULT (new_decl) = remap_decl (*res_decl, &id);
+ lang_hooks.dup_lang_specific_decl (DECL_RESULT (new_decl));
+ }
+
+ /* Renumber the lexical scoping (non-code) blocks consecutively. */
+ number_blocks (new_decl);
+
+ /* Clean up. */
+ pointer_map_destroy (id.decl_map);
+ if (!update_clones)
+ {
+ fold_marked_statements (0, id.statements_to_fold);
+ pointer_set_destroy (id.statements_to_fold);
+ fold_cond_expr_cond ();
+ }
+ if (gimple_in_ssa_p (cfun))
+ {
+ free_dominance_info (CDI_DOMINATORS);
+ free_dominance_info (CDI_POST_DOMINATORS);
+ if (!update_clones)
+ delete_unreachable_blocks ();
+ update_ssa (TODO_update_ssa);
+ if (!update_clones)
+ {
+ fold_cond_expr_cond ();
+ if (need_ssa_update_p ())
+ update_ssa (TODO_update_ssa);
+ }
+ }
+ free_dominance_info (CDI_DOMINATORS);
+ free_dominance_info (CDI_POST_DOMINATORS);
+ pop_cfun ();
+ current_function_decl = old_current_function_decl;
+ gcc_assert (!current_function_decl
+ || DECL_STRUCT_FUNCTION (current_function_decl) == cfun);
+ return;
+}
+
+/* Duplicate a type, fields and all. */
+
+tree
+build_duplicate_type (tree type)
+{
+ struct copy_body_data id;
+
+ memset (&id, 0, sizeof (id));
+ id.src_fn = current_function_decl;
+ id.dst_fn = current_function_decl;
+ id.src_cfun = cfun;
+ id.decl_map = pointer_map_create ();
+ id.copy_decl = copy_decl_no_change;
+
+ type = remap_type_1 (type, &id);
+
+ pointer_map_destroy (id.decl_map);
+
+ TYPE_CANONICAL (type) = type;
- add_var_to_bind_expr (bind_expr, vars);
+ return type;
}
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