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| author | Richard Guenther <rguenther@suse.de> | 2007-10-28 21:39:15 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2007-10-28 21:39:15 +0000 |
| commit | a9077d27daa2ebe96daf2caf526d94d1cff3a196 (patch) | |
| tree | ad7d04c51c358fd8705fd4abd8ae5ff7b569811e /gcc/tree-ssa-operands.c | |
| parent | 07bd6227933933df29af6cb5db4f52afc5e9043b (diff) | |
| download | gcc-a9077d27daa2ebe96daf2caf526d94d1cff3a196.zip gcc-a9077d27daa2ebe96daf2caf526d94d1cff3a196.tar.gz gcc-a9077d27daa2ebe96daf2caf526d94d1cff3a196.tar.bz2 | |
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
Diffstat (limited to 'gcc/tree-ssa-operands.c')
| -rw-r--r-- | gcc/tree-ssa-operands.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/gcc/tree-ssa-operands.c b/gcc/tree-ssa-operands.c index d5d3cbe..feeba6e 100644 --- a/gcc/tree-ssa-operands.c +++ b/gcc/tree-ssa-operands.c @@ -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) |