/* Tree inlining.
- Copyright 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007
+ Free Software Foundation, Inc.
Contributed by Alexandre Oliva <aoliva@redhat.com>
This file is part of GCC.
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. */
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
#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 "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"
/* 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;
- /* 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. */
+
+eni_weights eni_inlining_weights;
+
+/* Weights that estimate_num_insns uses to estimate the size of the
+ produced code. */
+
+eni_weights eni_size_weights;
+
+/* Weights that estimate_num_insns uses to estimate the time necessary
+ to execute the produced code. */
+
+eni_weights eni_time_weights;
/* Prototypes. */
-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 *);
+static tree declare_return_variable (copy_body_data *, tree, tree, tree *);
+static tree copy_generic_body (copy_body_data *);
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_no_change (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);
+ if (IS_EMPTY_STMT (SSA_NAME_DEF_STMT (name)))
+ {
+ 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);
+ }
+ SSA_NAME_OCCURS_IN_ABNORMAL_PHI (new)
+ = SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name);
+ TREE_TYPE (new) = TREE_TYPE (SSA_NAME_VAR (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;
+
+ /* We only remap local variables in the current function. */
+ fn = id->src_fn;
- /* See if we have remapped this declaration. If we didn't already have an
- equivalent for this declaration, create one now. */
+ /* 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)
+ set_default_def (t, map);
}
- DECL_ANON_UNION_ELEMS (t) = nreverse (members);
+ add_referenced_var (t);
}
-#endif
-
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 *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);
+ node = (tree *) pointer_map_contains (id->decl_map, type);
if (node)
- return (tree) node->value;
+ return *node;
- /* 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)))
+ /* 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;
case REAL_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 OFFSET_TYPE:
return new;
}
+tree
+remap_type (tree type, copy_body_data *id)
+{
+ tree *node;
+
+ 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;
+ }
+
+ return remap_type_1 (type, id);
+}
+
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 unexpanded_var_list
+ as we can't duplicate them or break one decl rule. Go ahead and link
+ them into unexpanded_var_list. */
+ if (!lang_hooks.tree_inlining.auto_var_in_fn_p (old_var, id->src_fn)
+ && !DECL_EXTERNAL (old_var))
+ {
+ cfun->unexpanded_var_list = tree_cons (NULL_TREE, old_var,
+ cfun->unexpanded_var_list);
+ 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. */
+ fn = id->dst_fn;
+
+ if (id->transform_lang_insert_block)
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
+
/* 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
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. */
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)
+ /* 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)
&& (lang_hooks.tree_inlining.auto_var_in_fn_p
- (TREE_OPERAND (*tp, 0), fn)))
+ (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))
{
/* Get rid of *& from inline substitutions that can happen when a
pointer argument is an ADDR_EXPR. */
tree decl = TREE_OPERAND (*tp, 0);
- splay_tree_node n;
+ tree *n;
- n = splay_tree_lookup (id->decl_map, (splay_tree_key) decl);
+ n = (tree *) pointer_map_contains (id->decl_map, decl);
if (n)
{
- *tp = build_fold_indirect_ref ((tree)n->value);
+ 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 = fold_indirect_ref_1 (type, new);
+ if (! *tp)
+ {
+ if (TREE_CODE (new) == ADDR_EXPR)
+ *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 didn't seen yet needs to go into referenced
+ vars. */
+ if (gimple_in_ssa_p (cfun) && TREE_CODE (*tp) == VAR_DECL)
+ 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_TYPE (*tp) = remap_type (TREE_TYPE (*tp), id);
/* The copied TARGET_EXPR has never been expanded, even if the
original node was expanded already. */
else if (TREE_CODE (*tp) == ADDR_EXPR)
{
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);
*walk_subtrees = 0;
}
}
return NULL_TREE;
}
+/* Copy basic block, scale profile accordingly. Edges will be taken care of
+ later */
+
+static basic_block
+copy_bb (copy_body_data *id, basic_block bb, int frequency_scale, int count_scale)
+{
+ 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;
+
+ walk_tree (&stmt, copy_body_r, id, NULL);
+
+ /* RETURN_EXPR might be removed,
+ this is signalled by making stmt pointer NULL. */
+ if (stmt)
+ {
+ tree call, decl;
+
+ gimple_duplicate_stmt_histograms (cfun, stmt, id->src_cfun, orig_stmt);
+
+ /* 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)))
+ gimplify_stmt (&stmt);
+
+ bsi_insert_after (©_bsi, stmt, BSI_NEW_STMT);
+
+ /* Process new statement. gimplify_stmt possibly turned statement
+ into multiple statements, we need to process all of them. */
+ while (!bsi_end_p (copy_bsi))
+ {
+ stmt = bsi_stmt (copy_bsi);
+ call = get_call_expr_in (stmt);
+
+ /* 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;
+}
+
+/* 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.
+
+ 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.
+
+ The function mark PHI_RESULT of such PHI nodes for renaming; it is
+ safe the EH edges are abnormal and SSA_NAME_OCCURS_IN_ABNORMAL_PHI
+ must be set. This means, that there will be no overlapping live ranges
+ for the underlying symbol.
+
+ 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_eh_edges (basic_block bb)
+{
+ edge e;
+ edge_iterator ei;
+
+ 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_EH);
+ for (phi = phi_nodes (e->dest); phi; phi = PHI_CHAIN (phi))
+ {
+ gcc_assert (SSA_NAME_OCCURS_IN_ABNORMAL_PHI
+ (PHI_RESULT (phi)));
+ mark_sym_for_renaming
+ (SSA_NAME_VAR (PHI_RESULT (phi)));
+ }
+ }
+}
+
+/* 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 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;
+
+ flags = old_edge->flags;
+
+ /* 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 copy_stmt;
+
+ 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. */
+
+ if (tree_can_throw_internal (copy_stmt))
+ {
+ 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);
+
+ new_bb = e->dest;
+ new_bb->aux = e->src->aux;
+ bsi = bsi_start (new_bb);
+ }
+
+ make_eh_edges (copy_stmt);
+
+ if (gimple_in_ssa_p (cfun))
+ update_ssa_across_eh_edges (bb_for_stmt (copy_stmt));
+ }
+ }
+}
+
+/* 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);
+ 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->unexpanded_var_list = NULL;
+ new_cfun->cfg = NULL;
+ new_cfun->decl = new_fndecl /*= copy_node (callee_fndecl)*/;
+ new_cfun->ib_boundaries_block = NULL;
+ 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->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 = n_basic_blocks;
+ /* 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);
+ 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 < n_basic_blocks; 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. */
static tree
-copy_body (inline_data *id)
+copy_generic_body (copy_body_data *id)
{
tree body;
- tree fndecl = VARRAY_TOP_TREE (id->fns);
+ tree fndecl = id->src_fn;
- if (fndecl == current_function_decl
- && cfun->saved_tree)
- body = cfun->saved_tree;
- else
- body = DECL_SAVED_TREE (fndecl);
+ 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. */
return false;
var = get_base_address (TREE_OPERAND (value, 0));
-
+
return var && lang_hooks.tree_inlining.auto_var_in_fn_p (var, fn);
}
static void
-setup_one_parameter (inline_data *id, tree p, tree value, tree fn,
- tree *init_stmts, tree *vars, bool *gimplify_init_stmts_p)
+setup_one_parameter (copy_body_data *id, tree p, tree value, tree fn,
+ basic_block bb, tree *vars)
{
tree init_stmt;
tree var;
-
- /* 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. */
+ tree var_sub;
+ tree rhs = value ? fold_convert (TREE_TYPE (p), value) : NULL;
+ tree def = (gimple_in_ssa_p (cfun)
+ ? gimple_default_def (id->src_cfun, p) : NULL);
+
+ /* 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))
+ && value && !TREE_SIDE_EFFECTS (value)
+ && !def)
{
- /* 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
/* 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));
+ 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);
+ }
+
+ /* See if the frontend wants to pass this by invisible reference. If
+ so, our new VAR_DECL will have REFERENCE_TYPE, and we need to
+ replace uses of the PARM_DECL with dereferences. */
+ if (TREE_TYPE (var) != TREE_TYPE (p)
+ && POINTER_TYPE_P (TREE_TYPE (var))
+ && TREE_TYPE (TREE_TYPE (var)) == TREE_TYPE (p))
+ {
+ insert_decl_map (id, var, var);
+ var_sub = build_fold_indirect_ref (var);
+ }
+ else
+ var_sub = 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);
+ insert_decl_map (id, p, var_sub);
/* Declare this new variable. */
TREE_CHAIN (var) = *vars;
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;
+ }
+
/* 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);
+ block_stmt_iterator bsi = bsi_last (bb);
if (rhs == error_mark_node)
- return;
+ {
+ insert_decl_map (id, p, var_sub);
+ return;
+ }
+
+ STRIP_USELESS_TYPE_CONVERSION (rhs);
- /* We want to use MODIFY_EXPR, not INIT_EXPR here so that we
+ /* We want to use GIMPLE_MODIFY_STMT, 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 (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 it's
+ tree code, not its operand. Thus the explicit check that its
operand is a gimple value. */
- if (!is_gimple_val (rhs)
+ if ((!is_gimple_val (rhs)
&& (!is_gimple_cast (rhs)
|| !is_gimple_val (TREE_OPERAND (rhs, 0))))
- *gimplify_init_stmts_p = true;
+ || !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 ARGS (presented as a TREE_LIST). */
+ top of the stack in ID from the CALL_EXPR EXP. */
-static tree
-initialize_inlined_parameters (inline_data *id, tree args, tree static_chain,
- tree fn, tree bind_expr)
+static void
+initialize_inlined_parameters (copy_body_data *id, tree exp,
+ tree fn, basic_block 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;
+ call_expr_arg_iterator iter;
+ tree static_chain = CALL_EXPR_STATIC_CHAIN (exp);
/* Figure out what the parameters are. */
parms = DECL_ARGUMENTS (fn);
- if (fn == current_function_decl)
- parms = cfun->saved_args;
/* 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))
+ for (p = parms, a = first_call_expr_arg (exp, &iter); p;
+ a = next_call_expr_arg (&iter), p = TREE_CHAIN (p))
{
tree value;
/* Find the initializer. */
value = lang_hooks.tree_inlining.convert_parm_for_inlining
- (p, a ? TREE_VALUE (a) : NULL_TREE, fn, argnum);
-
- setup_one_parameter (id, p, value, fn, &init_stmts, &vars,
- &gimplify_init_stmts_p);
- }
+ (p, a, fn, argnum);
- /* Evaluate trailing arguments. */
- for (; a; a = TREE_CHAIN (a))
- {
- tree value = TREE_VALUE (a);
- append_to_statement_list (value, &init_stmts);
+ setup_one_parameter (id, p, value, fn, bb, &vars);
}
/* Initialize the static chain. */
p = DECL_STRUCT_FUNCTION (fn)->static_chain_decl;
- if (fn == current_function_decl)
- p = DECL_STRUCT_FUNCTION (fn)->saved_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, false);
-
- 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;
- else
- var = build_fold_indirect_ref (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 = return_slot;
+ gcc_assert (TREE_CODE (var) != SSA_NAME);
+ }
+ 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;
/* 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
= tree_cons (NULL_TREE, var,
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))
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;
}
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;
been inlined into. Similarly __builtin_return would
return from the function the inline has been inlined into. */
inline_forbidden_reason
- = N_("%Jfunction %qF can never be inlined because "
+ = G_("function %q+F can never be inlined because "
"it uses __builtin_return or __builtin_apply_args");
return node;
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;
}
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;
}
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;
+ FOR_EACH_BB_FN (bb, DECL_STRUCT_FUNCTION (fndecl))
+ 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;
+ }
+
+egress:
input_location = saved_loc;
return ret;
}
&& !DECL_IN_SYSTEM_HEADER (fn));
if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)))
- sorry (inline_forbidden_reason, fn, fn);
+ sorry (inline_forbidden_reason, fn);
else if (do_warning)
- warning (0, inline_forbidden_reason, fn, fn);
+ warning (OPT_Winline, inline_forbidden_reason, fn);
inlinable = false;
}
return ((size + MOVE_MAX_PIECES - 1) / MOVE_MAX_PIECES);
}
+/* Arguments for estimate_num_insns_1. */
+
+struct eni_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)
{
- int *count = data;
+ struct eni_data *d = data;
tree x = *tp;
+ unsigned cost;
if (IS_TYPE_OR_DECL_P (x))
{
case LOOP_EXPR:
case PHI_NODE:
case WITH_SIZE_EXPR:
+ case OMP_CLAUSE:
+ case OMP_RETURN:
+ case OMP_CONTINUE:
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:
3) TARGET_EXPRs.
Let us look at the first two cases, assuming we have "a = b + C":
- <modify_expr <var_decl "a"> <plus_expr <var_decl "b"> <constant 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 MODIFY_EXPR.
+ 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 MODIFY_EXPR is the cost
+ 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 <modify_expr <var_decl "a"> <target_expr>>, the
- MODIFY_EXPR is free. */
+ temporary. E.g. in:
+ <GIMPLE_MODIFY_STMT <var_decl "a"> <target_expr>>, the
+ GIMPLE_MODIFY_STMT is free. */
case INIT_EXPR:
- case MODIFY_EXPR:
+ case GIMPLE_MODIFY_STMT:
/* Is the right and side a TARGET_EXPR? */
- if (TREE_CODE (TREE_OPERAND (x, 1)) == TARGET_EXPR)
+ if (TREE_CODE (GENERIC_TREE_OPERAND (x, 1)) == TARGET_EXPR)
break;
/* ... fall through ... */
case TARGET_EXPR:
- x = TREE_OPERAND (x, 0);
+ 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. */
-
+
case CONSTRUCTOR:
- *count += estimate_move_cost (TREE_TYPE (x));
+ d->count += estimate_move_cost (TREE_TYPE (x));
break;
/* Assign cost of 1 to usual operations.
case MULT_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 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_PACK_MOD_EXPR:
+ case VEC_PACK_SAT_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:
+ /* TODO: Cost of a switch should be derived from the number of
+ branches. */
+ d->count += d->weights->switch_cost;
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 arg;
+ cost = d->weights->call_cost;
if (decl && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
switch (DECL_FUNCTION_CODE (decl))
{
return NULL_TREE;
case BUILT_IN_EXPECT:
return NULL_TREE;
+ /* Prefetch instruction is not expensive. */
+ case BUILT_IN_PREFETCH:
+ cost = 1;
+ break;
default:
break;
}
that does use function declaration to figure out the arguments. */
if (!decl)
{
- for (arg = TREE_OPERAND (x, 1); arg; arg = TREE_CHAIN (arg))
- *count += estimate_move_cost (TREE_TYPE (TREE_VALUE (arg)));
+ tree a;
+ call_expr_arg_iterator iter;
+ FOR_EACH_CALL_EXPR_ARG (a, iter, x)
+ d->count += estimate_move_cost (TREE_TYPE (a));
}
else
{
+ tree arg;
for (arg = DECL_ARGUMENTS (decl); arg; arg = TREE_CHAIN (arg))
- *count += estimate_move_cost (TREE_TYPE (arg));
+ d->count += estimate_move_cost (TREE_TYPE (arg));
}
- *count += PARAM_VALUE (PARAM_INLINE_CALL_COST);
+ 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:
+ /* OpenMP directives are generally very expensive. */
+ d->count += d->weights->omp_cost;
+ break;
+
default:
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)
+{
+ 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)
{
- int num = 0;
- walk_tree_without_duplicates (&expr, estimate_num_insns_1, &num);
- return num;
+ eni_inlining_weights.call_cost = PARAM_VALUE (PARAM_INLINE_CALL_COST);
+ eni_inlining_weights.div_mod_cost = 10;
+ eni_inlining_weights.switch_cost = 1;
+ eni_inlining_weights.omp_cost = 40;
+
+ eni_size_weights.call_cost = 1;
+ eni_size_weights.div_mod_cost = 1;
+ eni_size_weights.switch_cost = 10;
+ 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.div_mod_cost = 10;
+ eni_time_weights.switch_cost = 4;
+ eni_time_weights.omp_cost = 40;
+}
+
+typedef struct function *function_p;
+
+DEF_VEC_P(function_p);
+DEF_VEC_ALLOC_P(function_p,heap);
+
+/* Initialized with NOGC, making this poisonous to the garbage collector. */
+static VEC(function_p,heap) *cfun_stack;
+
+void
+push_cfun (struct function *new_cfun)
+{
+ VEC_safe_push (function_p, heap, cfun_stack, cfun);
+ cfun = new_cfun;
+}
+
+void
+pop_cfun (void)
+{
+ cfun = VEC_pop (function_p, cfun_stack);
+}
+
+/* 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 = &TREE_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 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 (0, "%Jinlining failed in call to %qF: %s", fn, fn, reason);
- warning (0, "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;
- }
+ id->decl_map = pointer_map_create ();
- 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;
-
- 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);
- /* And add them to the tree. */
- append_to_statement_list (arg_inits, &BIND_EXPR_BODY (expr));
- }
+ initialize_inlined_parameters (id, t, fn, bb);
- /* Record the function we are about to inline so that we can avoid
- recursing into it. */
- VARRAY_PUSH_TREE (id->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_IGNORED_P (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)
+ return_slot = NULL;
+ if (TREE_CODE (stmt) == GIMPLE_MODIFY_STMT)
{
- modify_dest = TREE_OPERAND (modify_dest, 0);
+ 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
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;
/* Declare the return variable for the function. */
- declare_return_variable (id, return_slot_addr,
+ 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;
- tree copy;
-
- id->current_node = edge->callee;
- copy = copy_body (id);
-
- /* If the function uses a return slot, then it may legitimately
- fall through while still returning a value, so we have to skip
- the warning here. */
- if (warn_return_type
- && !TREE_NO_WARNING (fn)
- && !VOID_TYPE_P (TREE_TYPE (TREE_TYPE (fn)))
- && return_slot_addr == NULL_TREE
- && block_may_fallthru (copy))
- {
- warning (0, "control may reach end of non-void function %qD being inlined",
- fn);
- TREE_NO_WARNING (fn) = 1;
- }
-
- append_to_statement_list (copy, &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->unexpanded_var_list;
+ 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->unexpanded_var_list = tree_cons (NULL_TREE, var,
+ cfun->unexpanded_var_list);
+ else
+ cfun->unexpanded_var_list = tree_cons (NULL_TREE, remap_decl (var, id),
+ cfun->unexpanded_var_list);
}
/* Clean up. */
- splay_tree_delete (id->decl_map);
+ pointer_map_destroy (id->decl_map);
id->decl_map = st;
- /* Although, from the semantic viewpoint, the new expression has
- side-effects only if the old one did, it is not possible, from
- the technical viewpoint, to evaluate the body of a function
- multiple times without serious havoc. */
- TREE_SIDE_EFFECTS (expr) = 1;
-
- 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;
+ /* 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 = TREE_OPERAND (stmt, 0);
+ tree var = SSA_NAME_VAR (TREE_OPERAND (stmt, 0));
+ tree def = gimple_default_def (cfun, var);
- /* 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.
+ /* If the variable is used undefined, make this name undefined via
+ move. */
+ if (def)
+ {
+ TREE_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);
+ }
- Unfortunately, that is wrong as inlining the function can create/expose
- interesting side effects (such as setting of a return value).
+ if (purge_dead_abnormal_edges)
+ tree_purge_dead_abnormal_call_edges (return_block);
+
+ /* 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;
- The easiest solution is to simply recalculate TREE_SIDE_EFFECTS for
- the toplevel expression. */
- recalculate_side_effects (expr);
-
/* 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) (edge->callee->decl);
+ (*debug_hooks->outlining_inline_function) (cg_edge->callee->decl);
/* Update callgraph if needed. */
- cgraph_remove_node (edge->callee);
+ cgraph_remove_node (cg_edge->callee);
- /* Recurse into the body of the just inlined function. */
- expand_calls_inline (inlined_body, id);
- VARRAY_POP (id->fns);
+ id->block = NULL_TREE;
+ successfully_inlined = TRUE;
- /* Don't walk into subtrees. We've already handled them above. */
- *walk_subtrees = 0;
-
- lang_hooks.tree_inlining.end_inlining (fn);
-
- /* 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);
-
- 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);
- }
+/* 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);
+ if (fold_stmt (bsi_stmt_ptr (bsi)))
+ {
+ update_stmt (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;
+/* Return true if BB has at least one abnormal outgoing edge. */
- 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;
+static inline bool
+has_abnormal_outgoing_edge_p (basic_block bb)
+{
+ edge e;
+ edge_iterator ei;
- case BIND_EXPR:
- expand_calls_inline (&BIND_EXPR_BODY (stmt), id);
- break;
+ FOR_EACH_EDGE (e, ei, bb->succs)
+ if (e->flags & EDGE_ABNORMAL)
+ return true;
- case COMPOUND_EXPR:
- /* We're gimple. We should have gotten rid of all these. */
- gcc_unreachable ();
+ return false;
+}
- case RETURN_EXPR:
- stmt_p = &TREE_OPERAND (stmt, 0);
- stmt = *stmt_p;
- if (!stmt || TREE_CODE (stmt) != MODIFY_EXPR)
- break;
+/* When a block from the inlined function contains a call with side-effects
+ in the middle gets inlined in a function with non-locals labels, the call
+ becomes a potential non-local goto so we need to add appropriate edge. */
- /* FALLTHRU */
+static void
+make_nonlocal_label_edges (void)
+{
+ block_stmt_iterator bsi;
+ basic_block bb;
- case MODIFY_EXPR:
- stmt_p = &TREE_OPERAND (stmt, 1);
- stmt = *stmt_p;
- if (TREE_CODE (stmt) == WITH_SIZE_EXPR)
+ FOR_EACH_BB (bb)
+ {
+ for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi))
{
- stmt_p = &TREE_OPERAND (stmt, 0);
- stmt = *stmt_p;
- }
- if (TREE_CODE (stmt) != CALL_EXPR)
- break;
-
- /* FALLTHRU */
-
- case CALL_EXPR:
- expand_call_inline (stmt_p, &dummy, id);
- break;
+ tree stmt = bsi_stmt (bsi);
+ if (tree_can_make_abnormal_goto (stmt))
+ {
+ if (stmt == bsi_stmt (bsi_last (bb)))
+ {
+ if (!has_abnormal_outgoing_edge_p (bb))
+ make_abnormal_goto_edges (bb, true);
+ }
+ else
+ {
+ edge e = split_block (bb, stmt);
+ bb = e->src;
+ make_abnormal_goto_edges (bb, true);
+ }
+ break;
+ }
- default:
- break;
+ /* Update PHIs on nonlocal goto receivers we (possibly)
+ just created new edges into. */
+ if (TREE_CODE (stmt) == LABEL_EXPR
+ && gimple_in_ssa_p (cfun))
+ {
+ tree target = LABEL_EXPR_LABEL (stmt);
+ if (DECL_NONLOCAL (target))
+ {
+ tree phi;
+
+ for (phi = phi_nodes (bb); phi; phi = PHI_CHAIN (phi))
+ {
+ gcc_assert (SSA_NAME_OCCURS_IN_ABNORMAL_PHI
+ (PHI_RESULT (phi)));
+ mark_sym_for_renaming
+ (SSA_NAME_VAR (PHI_RESULT (phi)));
+ }
+ }
+ }
+ }
}
}
/* 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;
-
+ 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);
-
- /* 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);
-
- /* 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);
-
- /* Clean up. */
- htab_delete (id.tree_pruner);
+ 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 = false;
+ id.statements_to_fold = pointer_set_create ();
+
+ push_gimplify_context ();
+
+ /* 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);
+
+ pop_gimplify_context (NULL);
+ /* Renumber the (code) basic_blocks consecutively. */
+ compact_blocks ();
+ /* Renumber the lexical scoping (non-code) blocks consecutively. */
+ number_blocks (fn);
#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
+
+ /* 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_marked_statements (last, id.statements_to_fold);
+ pointer_set_destroy (id.statements_to_fold);
+ fold_cond_expr_cond ();
+ if (current_function_has_nonlocal_label)
+ make_nonlocal_label_edges ();
+ /* We make no attempts to keep dominance info up-to-date. */
+ free_dominance_info (CDI_DOMINATORS);
+ free_dominance_info (CDI_POST_DOMINATORS);
+ /* 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));
}
/* FN is a function that has a complete body, and CLONE is a function whose
void
clone_body (tree clone, tree fn, void *arg_map)
{
- inline_data id;
+ copy_body_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. */
+ parameters in the callee to the parameters of caller. */
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;
+ id.src_fn = fn;
+ id.dst_fn = clone;
+ id.src_cfun = DECL_STRUCT_FUNCTION (fn);
+ id.decl_map = (struct pointer_map_t *)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;
+ id.copy_decl = copy_decl_no_change;
+ id.transform_call_graph_edges = CB_CGE_DUPLICATE;
+ id.transform_new_cfg = true;
+ id.transform_return_to_modify = false;
+ id.transform_lang_insert_block = 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));
+ /* We're not inside any EH region. */
+ id.eh_region = -1;
/* Actually copy the body. */
- body = copy_body (&id);
-
- /* Clean up. */
- splay_tree_delete (id.decl_map);
- return body;
+ append_to_statement_list_force (copy_generic_body (&id), &DECL_SAVED_TREE (clone));
}
/* 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 = false;
/* 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->unexpanded_var_list =
+ tree_cons (NULL_TREE, t,
+ cfun->unexpanded_var_list);
+ }
+
+ 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);
+
+ 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);
+ }
+
+ return copy_decl_for_dup_finish (id, decl, copy);
+}
+
+
+static 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 = false;
+
+ 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)->unexpanded_var_list != NULL_TREE)
+ /* Add local vars. */
+ for (t_step = DECL_STRUCT_FUNCTION (old_decl)->unexpanded_var_list;
+ t_step; t_step = TREE_CHAIN (t_step))
+ {
+ tree var = TREE_VALUE (t_step);
+ if (TREE_STATIC (var) && !TREE_ASM_WRITTEN (var))
+ cfun->unexpanded_var_list = tree_cons (NULL_TREE, var,
+ cfun->unexpanded_var_list);
+ else
+ cfun->unexpanded_var_list =
+ tree_cons (NULL_TREE, remap_decl (var, &id),
+ cfun->unexpanded_var_list);
+ }
+
+ /* 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 ();
+
+ type = remap_type_1 (type, &id);
+
+ pointer_map_destroy (id.decl_map);
- add_var_to_bind_expr (bind_expr, vars);
+ return type;
}
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