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| author | amylaar <amylaar@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-02-13 12:40:29 +0000 |
|---|---|---|
| committer | amylaar <amylaar@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-02-13 12:40:29 +0000 |
| commit | 2e3893410b869103d753e883d1a36d0bb75c2702 (patch) | |
| tree | 6a925779458f601a118c1111003deb72d2bfd0a1 /gcc/sched.c | |
| parent | 23d33b75e164e3ae3be16ed12f2930c22d2e5161 (diff) | |
| download | gcc-2e3893410b869103d753e883d1a36d0bb75c2702.tar.gz | |
* sched.c (update_flow_info, REG_WAS_0): Ignore if setting insn
was deleted.
* haifa-sched.c (update_flow_info, REG_WAS_0): Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@17963 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/sched.c')
| -rw-r--r-- | gcc/sched.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/sched.c b/gcc/sched.c index b95241be765..2fae2d423d1 100644 --- a/gcc/sched.c +++ b/gcc/sched.c @@ -3854,6 +3854,14 @@ update_flow_info (notes, first, last, orig_insn) break; case REG_WAS_0: + /* If the insn that set the register to 0 was deleted, this + note cannot be relied on any longer. The destination might + even have been moved to memory. + This was observed for SH4 with execute/920501-6.c compilation, + -O2 -fomit-frame-pointer -finline-functions . */ + if (GET_CODE (XEXP (note, 0)) == NOTE + || INSN_DELETED_P (XEXP (note, 0))) + break; /* This note applies to the dest of the original insn. Find the first new insn that now has the same dest, and move the note there. */ |