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| author | hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-09-30 13:00:32 +0000 |
|---|---|---|
| committer | hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-09-30 13:00:32 +0000 |
| commit | 7832abdcde73d037e78e997d5c7cd8033773bece (patch) | |
| tree | 33d3f218be00b75d8fa831ceef6ceaea83289f19 /gcc/gcse.c | |
| parent | 971b1aa439c23bde10a7e729616811377c9fbb58 (diff) | |
| download | gcc-7832abdcde73d037e78e997d5c7cd8033773bece.tar.gz | |
* i386.h (TARGET_CPP_CPU_BUILTINS): Define __SSE_MATH__.
* gcse.c (cprop_jump): Check that the register has not
been modified
(cprop_jump): Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@57648 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/gcse.c')
| -rw-r--r-- | gcc/gcse.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/gcc/gcse.c b/gcc/gcse.c index fbe3fcb1200..081275a0c7d 100644 --- a/gcc/gcse.c +++ b/gcc/gcse.c @@ -4054,7 +4054,9 @@ cprop_jump (bb, setcc, jump, from, src) /* First substitute in the INSN condition as the SET_SRC of the JUMP, then substitute that given values in this expanded JUMP. */ - if (setcc != NULL) + if (setcc != NULL + && !modified_between_p (from, setcc, jump) + && !modified_between_p (src, setcc, jump)) { rtx setcc_set = single_set (setcc); new_set = simplify_replace_rtx (SET_SRC (set), @@ -4068,7 +4070,7 @@ cprop_jump (bb, setcc, jump, from, src) /* If no simplification can be made, then try the next register. */ - if (rtx_equal_p (new, new_set)) + if (rtx_equal_p (new, new_set) || rtx_equal_p (new, SET_SRC (set))) return 0; /* If this is now a no-op delete it, otherwise this must be a valid insn. */ @@ -4076,6 +4078,11 @@ cprop_jump (bb, setcc, jump, from, src) delete_insn (jump); else { + /* Ensure the value computed inside the jump insn to be equivalent + to one computed by setcc. */ + if (setcc + && modified_in_p (new, setcc)) + return 0; if (! validate_change (jump, &SET_SRC (set), new, 0)) return 0; |