diff options
| author | rms <rms@138bc75d-0d04-0410-961f-82ee72b054a4> | 1993-04-11 18:46:06 +0000 |
|---|---|---|
| committer | rms <rms@138bc75d-0d04-0410-961f-82ee72b054a4> | 1993-04-11 18:46:06 +0000 |
| commit | af61660e9703bd1618892c9fe9b6f4f2f52a91ee (patch) | |
| tree | 921912f547c6795e195ee78698f79064d43b0ba6 /gcc/combine.c | |
| parent | 004f44257fa460df80570719e0ea2afa852ecce8 (diff) | |
| download | gcc-af61660e9703bd1618892c9fe9b6f4f2f52a91ee.tar.gz | |
(can_combine_p): Don't move an UNSPEC_VOLATILE.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@4085 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index a33bcc1e293..86f920cf5c5 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -825,10 +825,12 @@ can_combine_p (insn, i3, pred, succ, pdest, psrc) If the insns are adjacent, a use can't cross a set even though we think it might (this can happen for a sequence of insns each setting the same destination; reg_last_set of that register might point to - a NOTE). Also, don't move a volatile asm across any other insns. */ + a NOTE). Also, don't move a volatile asm or UNSPEC_VOLATILE across + any other insns. */ || (! all_adjacent && (use_crosses_set_p (src, INSN_CUID (insn)) - || (GET_CODE (src) == ASM_OPERANDS && MEM_VOLATILE_P (src)))) + || (GET_CODE (src) == ASM_OPERANDS && MEM_VOLATILE_P (src)) + || GET_CODE (src) == UNSPEC_VOLATILE)) /* If there is a REG_NO_CONFLICT note for DEST in I3 or SUCC, we get better register allocation by not doing the combine. */ || find_reg_note (i3, REG_NO_CONFLICT, dest) |