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| author | Jakub Jelinek <jakub@redhat.com> | 2011-06-22 12:46:36 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2011-06-22 12:46:36 +0200 |
| commit | 36dc1a88ff11de41ed1b2a313f28ad12cd3c7bd3 (patch) | |
| tree | 5db992248a216e242d2e9eff0ad5aea9a9f3ebdd /gcc/tree-ssa-alias.c | |
| parent | 41cd495729ac43083ce23687b55c42f3a6c298d1 (diff) | |
| download | gcc-36dc1a88ff11de41ed1b2a313f28ad12cd3c7bd3.zip gcc-36dc1a88ff11de41ed1b2a313f28ad12cd3c7bd3.tar.gz gcc-36dc1a88ff11de41ed1b2a313f28ad12cd3c7bd3.tar.bz2 | |
tree-ssa-ccp.c (evaluate_stmt): Try bitwise tracking for builtin calls even if likelyvalue is not CONSTANT.
* tree-ssa-ccp.c (evaluate_stmt): Try bitwise tracking for
builtin calls even if likelyvalue is not CONSTANT.
Handle BUILT_IN_STRDUP and BUILT_IN_STRNDUP like BUILT_IN_MALLOC.
Return get_value_for_expr of first operand
for BUILT_IN_{MEM{CPY,MOVE,SET},STR{,N}CPY}{,_CHK}.
* tree-ssa-alias.c (ref_maybe_used_by_call_p_1): Handle
BUILT_IN_{MEM{{,P}CPY,MOVE,SET},STR{,N}C{PY,AT},STPCPY}_CHK like
their non-checking counterparts.
(call_may_clobber_ref_p_1): Likewise.
(stmt_kills_ref_p_1): Handle BUILT_IN_MEM{{,P}CPY,MOVE,SET}_CHK
like their non-checking counterparts.
* tree-ssa-structalias.c (find_func_aliases_for_builtin_call):
Handle BUILT_IN_{MEM{{,P}CPY,MOVE,SET},STR{,N}C{PY,AT},STPCPY}_CHK
like their non-checking counterparts.
(find_func_clobbers): Likewise.
* tree-ssa-dce.c (propagate_necessity): Handle BUILT_IN_MEMSET_CHK
like BUILT_IN_MEMSET and BUILT_IN_CALLOC like BUILT_IN_MALLOC.
From-SVN: r175290
Diffstat (limited to 'gcc/tree-ssa-alias.c')
| -rw-r--r-- | gcc/tree-ssa-alias.c | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c index 02b3ca0..5647899 100644 --- a/gcc/tree-ssa-alias.c +++ b/gcc/tree-ssa-alias.c @@ -1,5 +1,5 @@ /* Alias analysis for trees. - Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 + Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. Contributed by Diego Novillo <dnovillo@redhat.com> @@ -1199,6 +1199,24 @@ ref_maybe_used_by_call_p_1 (gimple call, ao_ref *ref) size); return refs_may_alias_p_1 (&dref, ref, false); } + case BUILT_IN_STRCPY_CHK: + case BUILT_IN_STRNCPY_CHK: + case BUILT_IN_MEMCPY_CHK: + case BUILT_IN_MEMMOVE_CHK: + case BUILT_IN_MEMPCPY_CHK: + case BUILT_IN_STPCPY_CHK: + case BUILT_IN_STRCAT_CHK: + case BUILT_IN_STRNCAT_CHK: + { + ao_ref dref; + tree size = NULL_TREE; + if (gimple_call_num_args (call) == 4) + size = gimple_call_arg (call, 2); + ao_ref_init_from_ptr_and_size (&dref, + gimple_call_arg (call, 1), + size); + return refs_may_alias_p_1 (&dref, ref, false); + } case BUILT_IN_BCOPY: { ao_ref dref; @@ -1216,6 +1234,7 @@ ref_maybe_used_by_call_p_1 (gimple call, ao_ref *ref) case BUILT_IN_STACK_SAVE: case BUILT_IN_STACK_RESTORE: case BUILT_IN_MEMSET: + case BUILT_IN_MEMSET_CHK: case BUILT_IN_FREXP: case BUILT_IN_FREXPF: case BUILT_IN_FREXPL: @@ -1453,6 +1472,25 @@ call_may_clobber_ref_p_1 (gimple call, ao_ref *ref) size); return refs_may_alias_p_1 (&dref, ref, false); } + case BUILT_IN_STRCPY_CHK: + case BUILT_IN_STRNCPY_CHK: + case BUILT_IN_MEMCPY_CHK: + case BUILT_IN_MEMMOVE_CHK: + case BUILT_IN_MEMPCPY_CHK: + case BUILT_IN_STPCPY_CHK: + case BUILT_IN_STRCAT_CHK: + case BUILT_IN_STRNCAT_CHK: + case BUILT_IN_MEMSET_CHK: + { + ao_ref dref; + tree size = NULL_TREE; + if (gimple_call_num_args (call) == 4) + size = gimple_call_arg (call, 2); + ao_ref_init_from_ptr_and_size (&dref, + gimple_call_arg (call, 0), + size); + return refs_may_alias_p_1 (&dref, ref, false); + } case BUILT_IN_BCOPY: { ao_ref dref; @@ -1697,6 +1735,10 @@ stmt_kills_ref_p_1 (gimple stmt, ao_ref *ref) case BUILT_IN_MEMPCPY: case BUILT_IN_MEMMOVE: case BUILT_IN_MEMSET: + case BUILT_IN_MEMCPY_CHK: + case BUILT_IN_MEMPCPY_CHK: + case BUILT_IN_MEMMOVE_CHK: + case BUILT_IN_MEMSET_CHK: { tree dest = gimple_call_arg (stmt, 0); tree len = gimple_call_arg (stmt, 2); |