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tree-ssa-operands.c (add_vars_for_offset): Add parameter telling if the var is to be treated as points-to location. 

2007-10-28  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-operands.c (add_vars_for_offset): Add parameter
	telling if the var is to be treated as points-to location.
	(add_vars_for_bitmap): Pass true to add_vars_for_offset.
	(add_virtual_operand): Only recurse into MPTs if aliases
	is from a NMT.

From-SVN: r129704
This commit is contained in:
Richard Guenther 2007-10-28 21:39:15 +00:00 committed by Richard Biener
parent 07bd622793
commit a9077d27da
2 changed files with 20 additions and 7 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2007-10-28 Richard Guenther <rguenther@suse.de>
* tree-ssa-operands.c (add_vars_for_offset): Add parameter
telling if the var is to be treated as points-to location.
(add_vars_for_bitmap): Pass true to add_vars_for_offset.
(add_virtual_operand): Only recurse into MPTs if aliases
is from a NMT.
2007-10-28 Richard Guenther <rguenther@suse.de>
* tree-ssa-operands.c (add_vars_for_offset): Clean and speed up.

19
gcc/tree-ssa-operands.c
View File

@ -1386,11 +1386,12 @@ access_can_touch_variable (tree ref, tree alias, HOST_WIDE_INT offset,
This is necessary because foop only actually points to foo's first
member, so that is all the points-to set contains. However, an access
to foop->a may be touching some single SFT if we have created some
SFT's for a structure. */
SFT's for a structure. If AS_PTO is false, just add VAR to the vops. */
static bool
add_vars_for_offset (tree full_ref, tree var, HOST_WIDE_INT offset,
HOST_WIDE_INT size, bool is_call_site, bool is_def)
HOST_WIDE_INT size, bool is_call_site, bool is_def,
bool as_pto)
{
bool added = false;
subvar_t sv;
@ -1405,7 +1406,8 @@ add_vars_for_offset (tree full_ref, tree var, HOST_WIDE_INT offset,
return false;
/* For SFTs we have to consider all subvariables of the parent var. */
if (TREE_CODE (var) != STRUCT_FIELD_TAG)
if (TREE_CODE (var) != STRUCT_FIELD_TAG
|| !as_pto)
{
/* If we do not know the full reference tree or if the access is
unspecified [0, -1], we cannot prune it. Otherwise try doing
@ -1465,7 +1467,7 @@ add_vars_for_bitmap (bitmap aliases, tree full_ref,
if (TREE_CODE (al) == STRUCT_FIELD_TAG)
*none_added &= !add_vars_for_offset (full_ref, al, offset, size,
is_call_site, is_def);
is_call_site, is_def, true);
}
}
@ -1546,12 +1548,15 @@ add_virtual_operand (tree var, stmt_ann_t s_ann, int flags,
/* We have to consider SFTs inside MPTs as possible pointed-to
location as well because even if aliases does not contain
a single SFT, the SFTs inside the MPT may be incomplete in
that not all aliased subvars have to be in this MPT, too. */
if (TREE_CODE (al) == MEMORY_PARTITION_TAG)
that not all aliased subvars have to be in this MPT, too.
But only if we start with NMT aliases. */
if (TREE_CODE (al) == MEMORY_PARTITION_TAG
&& TREE_CODE (var) == NAME_MEMORY_TAG)
add_vars_for_bitmap (MPT_SYMBOLS (al), full_ref, offset, size,
is_call_site, flags & opf_def, &none_added);
none_added &= !add_vars_for_offset (full_ref, al, offset, size,
is_call_site, flags & opf_def);
is_call_site, flags & opf_def,
TREE_CODE (var) == NAME_MEMORY_TAG);
}
if (flags & opf_def)