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| author | ian <ian@138bc75d-0d04-0410-961f-82ee72b054a4> | 1997-01-29 20:25:29 +0000 |
|---|---|---|
| committer | ian <ian@138bc75d-0d04-0410-961f-82ee72b054a4> | 1997-01-29 20:25:29 +0000 |
| commit | 8671d9aed15a97371ed7ef13830bc29e5304fa28 (patch) | |
| tree | 634937eb8340075f71bb99f73e363051caeb9524 /gcc/combine.c | |
| parent | 2969de6be252acbcea2a27f178388d471b0b2dbe (diff) | |
| download | gcc-8671d9aed15a97371ed7ef13830bc29e5304fa28.tar.gz | |
Add a case where reg_n_refs is cleared
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@13561 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index be5843b5629..a0f15b3672c 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -2355,7 +2355,9 @@ try_combine (i3, i2, i1) /* If the reg formerly set in I2 died only once and that was in I3, zero its use count so it won't make `reload' do any work. */ - if (! added_sets_2 && newi2pat == 0 && ! i2dest_in_i2src) + if (! added_sets_2 + && (newi2pat == 0 || ! reg_mentioned_p (i2dest, newi2pat)) + && ! i2dest_in_i2src) { regno = REGNO (i2dest); reg_n_sets[regno]--; |