/* Data flow functions for trees.
- Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
Contributed by Diego Novillo <dnovillo@redhat.com>
#include "hashtab.h"
#include "pointer-set.h"
#include "tree.h"
-#include "rtl.h"
#include "tm_p.h"
-#include "hard-reg-set.h"
#include "basic-block.h"
#include "output.h"
#include "timevar.h"
-#include "expr.h"
#include "ggc.h"
#include "langhooks.h"
#include "flags.h"
#include "function.h"
-#include "diagnostic.h"
+#include "tree-pretty-print.h"
#include "tree-dump.h"
#include "gimple.h"
#include "tree-flow.h"
PROP_gimple_leh | PROP_cfg, /* properties_required */
PROP_referenced_vars, /* properties_provided */
0, /* properties_destroyed */
- TODO_dump_func, /* todo_flags_start */
- TODO_dump_func /* todo_flags_finish */
+ 0, /* todo_flags_start */
+ 0 /* todo_flags_finish */
}
};
|| TREE_CODE (t) == PARM_DECL
|| TREE_CODE (t) == RESULT_DECL);
- ann = GGC_CNEW (struct var_ann_d);
+ ann = ggc_alloc_cleared_var_ann_d ();
*DECL_VAR_ANN_PTR (t) = ann;
return ann;
FOR_ALL_BB (bb)
{
gimple_stmt_iterator bsi;
+ for (bsi = gsi_start_phis (bb); !gsi_end_p (bsi); gsi_next (&bsi))
+ {
+ gimple stmt = gsi_stmt (bsi);
+ gimple_set_uid (stmt, inc_gimple_stmt_max_uid (cfun));
+ }
for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi))
{
gimple stmt = gsi_stmt (bsi);
tree
make_rename_temp (tree type, const char *prefix)
{
- tree t = create_tmp_var (type, prefix);
-
- if (TREE_CODE (TREE_TYPE (t)) == COMPLEX_TYPE
- || TREE_CODE (TREE_TYPE (t)) == VECTOR_TYPE)
- DECL_GIMPLE_REG_P (t) = 1;
+ tree t = create_tmp_reg (type, prefix);
if (gimple_referenced_vars (cfun))
{
fprintf (file, "\nReferenced variables in %s: %u\n\n",
get_name (current_function_decl), (unsigned) num_referenced_vars);
- FOR_EACH_REFERENCED_VAR (var, rvi)
+ FOR_EACH_REFERENCED_VAR (cfun, var, rvi)
{
fprintf (file, "Variable: ");
dump_variable (file, var);
/* Dump the list of all the referenced variables to stderr. */
-void
+DEBUG_FUNCTION void
debug_referenced_vars (void)
{
dump_referenced_vars (stderr);
void
dump_variable (FILE *file, tree var)
{
- var_ann_t ann;
-
if (TREE_CODE (var) == SSA_NAME)
{
if (POINTER_TYPE_P (TREE_TYPE (var)))
print_generic_expr (file, var, dump_flags);
- ann = var_ann (var);
-
fprintf (file, ", UID D.%u", (unsigned) DECL_UID (var));
if (DECL_PT_UID (var) != DECL_UID (var))
fprintf (file, ", PT-UID D.%u", (unsigned) DECL_PT_UID (var));
if (TREE_THIS_VOLATILE (var))
fprintf (file, ", is volatile");
- if (ann && ann->noalias_state == NO_ALIAS)
- fprintf (file, ", NO_ALIAS (does not alias other NO_ALIAS symbols)");
- else if (ann && ann->noalias_state == NO_ALIAS_GLOBAL)
- fprintf (file, ", NO_ALIAS_GLOBAL (does not alias other NO_ALIAS symbols"
- " and global vars)");
- else if (ann && ann->noalias_state == NO_ALIAS_ANYTHING)
- fprintf (file, ", NO_ALIAS_ANYTHING (does not alias any other symbols)");
-
if (cfun && gimple_default_def (cfun, var))
{
fprintf (file, ", default def: ");
/* Dump variable VAR and its may-aliases to stderr. */
-void
+DEBUG_FUNCTION void
debug_variable (tree var)
{
dump_variable (stderr, var);
/* Dump DFA statistics on stderr. */
-void
+DEBUG_FUNCTION void
debug_dfa_stats (void)
{
dump_dfa_stats (stderr);
memset ((void *)dfa_stats_p, 0, sizeof (struct dfa_stats_d));
/* Count all the variable annotations. */
- FOR_EACH_REFERENCED_VAR (var, vi)
+ FOR_EACH_REFERENCED_VAR (cfun, var, vi)
if (var_ann (var))
dfa_stats_p->num_var_anns++;
variable. */
tree
-referenced_var_lookup (unsigned int uid)
+referenced_var_lookup (struct function *fn, unsigned int uid)
{
tree h;
struct tree_decl_minimal in;
in.uid = uid;
- h = (tree) htab_find_with_hash (gimple_referenced_vars (cfun), &in, uid);
- gcc_assert (h || uid == 0);
+ h = (tree) htab_find_with_hash (gimple_referenced_vars (fn), &in, uid);
return h;
}
bool
add_referenced_var (tree var)
{
- get_var_ann (var);
gcc_assert (DECL_P (var));
+ if (!*DECL_VAR_ANN_PTR (var))
+ create_var_ann (var);
- /* Insert VAR into the referenced_vars has table if it isn't present. */
+ /* Insert VAR into the referenced_vars hash table if it isn't present. */
if (referenced_var_check_and_insert (var))
{
/* Scan DECL_INITIAL for pointer variables as they may contain
HOST_WIDE_INT bitsize = -1;
HOST_WIDE_INT maxsize = -1;
tree size_tree = NULL_TREE;
- HOST_WIDE_INT bit_offset = 0;
+ double_int bit_offset = double_int_zero;
+ HOST_WIDE_INT hbit_offset;
bool seen_variable_array_ref = false;
/* First get the final access size from just the outermost expression. */
switch (TREE_CODE (exp))
{
case BIT_FIELD_REF:
- bit_offset += TREE_INT_CST_LOW (TREE_OPERAND (exp, 2));
+ bit_offset
+ = double_int_add (bit_offset,
+ tree_to_double_int (TREE_OPERAND (exp, 2)));
break;
case COMPONENT_REF:
tree field = TREE_OPERAND (exp, 1);
tree this_offset = component_ref_field_offset (exp);
- if (this_offset
- && TREE_CODE (this_offset) == INTEGER_CST
- && host_integerp (this_offset, 0))
+ if (this_offset && TREE_CODE (this_offset) == INTEGER_CST)
{
- HOST_WIDE_INT hthis_offset = TREE_INT_CST_LOW (this_offset);
- hthis_offset *= BITS_PER_UNIT;
- hthis_offset
- += TREE_INT_CST_LOW (DECL_FIELD_BIT_OFFSET (field));
- bit_offset += hthis_offset;
+ double_int doffset = tree_to_double_int (this_offset);
+ doffset = double_int_lshift (doffset,
+ BITS_PER_UNIT == 8
+ ? 3 : exact_log2 (BITS_PER_UNIT),
+ HOST_BITS_PER_DOUBLE_INT, true);
+ doffset = double_int_add (doffset,
+ tree_to_double_int
+ (DECL_FIELD_BIT_OFFSET (field)));
+ bit_offset = double_int_add (bit_offset, doffset);
/* If we had seen a variable array ref already and we just
referenced the last field of a struct or a union member
then we have to adjust maxsize by the padding at the end
of our field. */
- if (seen_variable_array_ref
- && maxsize != -1)
+ if (seen_variable_array_ref && maxsize != -1)
{
tree stype = TREE_TYPE (TREE_OPERAND (exp, 0));
- tree next = TREE_CHAIN (field);
+ tree next = DECL_CHAIN (field);
while (next && TREE_CODE (next) != FIELD_DECL)
- next = TREE_CHAIN (next);
+ next = DECL_CHAIN (next);
if (!next
|| TREE_CODE (stype) != RECORD_TYPE)
{
tree fsize = DECL_SIZE_UNIT (field);
tree ssize = TYPE_SIZE_UNIT (stype);
if (host_integerp (fsize, 0)
- && host_integerp (ssize, 0))
+ && host_integerp (ssize, 0)
+ && double_int_fits_in_shwi_p (doffset))
maxsize += ((TREE_INT_CST_LOW (ssize)
- TREE_INT_CST_LOW (fsize))
- * BITS_PER_UNIT - hthis_offset);
+ * BITS_PER_UNIT
+ - double_int_to_shwi (doffset));
else
maxsize = -1;
}
/* We need to adjust maxsize to the whole structure bitsize.
But we can subtract any constant offset seen so far,
because that would get us out of the structure otherwise. */
- if (maxsize != -1 && csize && host_integerp (csize, 1))
- maxsize = TREE_INT_CST_LOW (csize) - bit_offset;
+ if (maxsize != -1
+ && csize
+ && host_integerp (csize, 1)
+ && double_int_fits_in_shwi_p (bit_offset))
+ maxsize = TREE_INT_CST_LOW (csize)
+ - double_int_to_shwi (bit_offset);
else
maxsize = -1;
}
/* If the resulting bit-offset is constant, track it. */
if (TREE_CODE (index) == INTEGER_CST
- && host_integerp (index, 0)
&& (low_bound = array_ref_low_bound (exp),
- host_integerp (low_bound, 0))
+ TREE_CODE (low_bound) == INTEGER_CST)
&& (unit_size = array_ref_element_size (exp),
- host_integerp (unit_size, 1)))
+ TREE_CODE (unit_size) == INTEGER_CST))
{
- HOST_WIDE_INT hindex = TREE_INT_CST_LOW (index);
-
- hindex -= TREE_INT_CST_LOW (low_bound);
- hindex *= TREE_INT_CST_LOW (unit_size);
- hindex *= BITS_PER_UNIT;
- bit_offset += hindex;
+ double_int doffset
+ = double_int_sext
+ (double_int_sub (TREE_INT_CST (index),
+ TREE_INT_CST (low_bound)),
+ TYPE_PRECISION (TREE_TYPE (index)));
+ doffset = double_int_mul (doffset,
+ tree_to_double_int (unit_size));
+ doffset = double_int_lshift (doffset,
+ BITS_PER_UNIT == 8
+ ? 3 : exact_log2 (BITS_PER_UNIT),
+ HOST_BITS_PER_DOUBLE_INT, true);
+ bit_offset = double_int_add (bit_offset, doffset);
/* An array ref with a constant index up in the structure
hierarchy will constrain the size of any variable array ref
/* We need to adjust maxsize to the whole array bitsize.
But we can subtract any constant offset seen so far,
because that would get us outside of the array otherwise. */
- if (maxsize != -1 && asize && host_integerp (asize, 1))
- maxsize = TREE_INT_CST_LOW (asize) - bit_offset;
+ if (maxsize != -1
+ && asize
+ && host_integerp (asize, 1)
+ && double_int_fits_in_shwi_p (bit_offset))
+ maxsize = TREE_INT_CST_LOW (asize)
+ - double_int_to_shwi (bit_offset);
else
maxsize = -1;
break;
case IMAGPART_EXPR:
- bit_offset += bitsize;
+ bit_offset
+ = double_int_add (bit_offset, uhwi_to_double_int (bitsize));
break;
case VIEW_CONVERT_EXPR:
break;
+ case TARGET_MEM_REF:
+ /* Via the variable index or index2 we can reach the
+ whole object. Still hand back the decl here. */
+ if (TREE_CODE (TMR_BASE (exp)) == ADDR_EXPR
+ && (TMR_INDEX (exp) || TMR_INDEX2 (exp)))
+ {
+ exp = TREE_OPERAND (TMR_BASE (exp), 0);
+ bit_offset = double_int_zero;
+ maxsize = -1;
+ goto done;
+ }
+ /* Fallthru. */
+ case MEM_REF:
+ /* We need to deal with variable arrays ending structures such as
+ struct { int length; int a[1]; } x; x.a[d]
+ struct { struct { int a; int b; } a[1]; } x; x.a[d].a
+ struct { struct { int a[1]; } a[1]; } x; x.a[0][d], x.a[d][0]
+ struct { int len; union { int a[1]; struct X x; } u; } x; x.u.a[d]
+ where we do not know maxsize for variable index accesses to
+ the array. The simplest way to conservatively deal with this
+ is to punt in the case that offset + maxsize reaches the
+ base type boundary. This needs to include possible trailing
+ padding that is there for alignment purposes. */
+ if (seen_variable_array_ref
+ && maxsize != -1
+ && (!double_int_fits_in_shwi_p (bit_offset)
+ || !host_integerp (TYPE_SIZE (TREE_TYPE (exp)), 1)
+ || (double_int_to_shwi (bit_offset) + maxsize
+ == (HOST_WIDE_INT) TREE_INT_CST_LOW
+ (TYPE_SIZE (TREE_TYPE (exp))))))
+ maxsize = -1;
+
+ /* Hand back the decl for MEM[&decl, off]. */
+ if (TREE_CODE (TREE_OPERAND (exp, 0)) == ADDR_EXPR)
+ {
+ if (integer_zerop (TREE_OPERAND (exp, 1)))
+ exp = TREE_OPERAND (TREE_OPERAND (exp, 0), 0);
+ else
+ {
+ double_int off = mem_ref_offset (exp);
+ off = double_int_lshift (off,
+ BITS_PER_UNIT == 8
+ ? 3 : exact_log2 (BITS_PER_UNIT),
+ HOST_BITS_PER_DOUBLE_INT, true);
+ off = double_int_add (off, bit_offset);
+ if (double_int_fits_in_shwi_p (off))
+ {
+ bit_offset = off;
+ exp = TREE_OPERAND (TREE_OPERAND (exp, 0), 0);
+ }
+ }
+ }
+ goto done;
+
default:
goto done;
}
exp = TREE_OPERAND (exp, 0);
}
+
+ /* We need to deal with variable arrays ending structures. */
+ if (seen_variable_array_ref
+ && maxsize != -1
+ && (!double_int_fits_in_shwi_p (bit_offset)
+ || !host_integerp (TYPE_SIZE (TREE_TYPE (exp)), 1)
+ || (double_int_to_shwi (bit_offset) + maxsize
+ == (HOST_WIDE_INT)
+ TREE_INT_CST_LOW (TYPE_SIZE (TREE_TYPE (exp))))))
+ maxsize = -1;
+
done:
+ if (!double_int_fits_in_shwi_p (bit_offset))
+ {
+ *poffset = 0;
+ *psize = bitsize;
+ *pmax_size = -1;
- /* We need to deal with variable arrays ending structures such as
- struct { int length; int a[1]; } x; x.a[d]
- struct { struct { int a; int b; } a[1]; } x; x.a[d].a
- struct { struct { int a[1]; } a[1]; } x; x.a[0][d], x.a[d][0]
- struct { int len; union { int a[1]; struct X x; } u; } x; x.u.a[d]
- where we do not know maxsize for variable index accesses to
- the array. The simplest way to conservatively deal with this
- is to punt in the case that offset + maxsize reaches the
- base type boundary. This needs to include possible trailing padding
- that is there for alignment purposes.
+ return exp;
+ }
- That is of course only true if the base object is not a decl. */
+ hbit_offset = double_int_to_shwi (bit_offset);
+
+ /* In case of a decl or constant base object we can do better. */
if (DECL_P (exp))
{
base decl. */
if (maxsize == -1
&& host_integerp (DECL_SIZE (exp), 1))
- maxsize = TREE_INT_CST_LOW (DECL_SIZE (exp)) - bit_offset;
+ maxsize = TREE_INT_CST_LOW (DECL_SIZE (exp)) - hbit_offset;
+ }
+ else if (CONSTANT_CLASS_P (exp))
+ {
+ /* If maxsize is unknown adjust it according to the size of the
+ base type constant. */
+ if (maxsize == -1
+ && host_integerp (TYPE_SIZE (TREE_TYPE (exp)), 1))
+ maxsize = TREE_INT_CST_LOW (TYPE_SIZE (TREE_TYPE (exp))) - hbit_offset;
}
- else if (seen_variable_array_ref
- && maxsize != -1
- && (!host_integerp (TYPE_SIZE (TREE_TYPE (exp)), 1)
- || (bit_offset + maxsize
- == (signed) TREE_INT_CST_LOW (TYPE_SIZE (TREE_TYPE (exp))))))
- maxsize = -1;
/* ??? Due to negative offsets in ARRAY_REF we can end up with
negative bit_offset here. We might want to store a zero offset
in this case. */
- *poffset = bit_offset;
+ *poffset = hbit_offset;
*psize = bitsize;
*pmax_size = maxsize;
return exp;
}
+/* Returns the base object and a constant BITS_PER_UNIT offset in *POFFSET that
+ denotes the starting address of the memory access EXP.
+ Returns NULL_TREE if the offset is not constant or any component
+ is not BITS_PER_UNIT-aligned. */
+
+tree
+get_addr_base_and_unit_offset (tree exp, HOST_WIDE_INT *poffset)
+{
+ return get_addr_base_and_unit_offset_1 (exp, poffset, NULL);
+}
+
/* Returns true if STMT references an SSA_NAME that has
SSA_NAME_OCCURS_IN_ABNORMAL_PHI set, otherwise false. */
return false;
}
-
OSDN Git Service
