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| author | Jakub Jelinek <jakub@redhat.com> | 2021-06-10 09:28:27 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2021-06-10 09:28:27 +0200 |
| commit | 2d2ed777b23ab6503027039e0adbfe1162f52b2f (patch) | |
| tree | 4831039572de8d0a1592895102be1211694f6315 /gcc/ifcvt.c | |
| parent | f8b067056ba5dd53f7bc883a1f59833efc26bd3e (diff) | |
| download | gcc-2d2ed777b23ab6503027039e0adbfe1162f52b2f.zip gcc-2d2ed777b23ab6503027039e0adbfe1162f52b2f.tar.gz gcc-2d2ed777b23ab6503027039e0adbfe1162f52b2f.tar.bz2 | |
ifcvt: Fix -fcompare-debug bug [PR100852]
The following testcase fails -fcompare-debug, because it is ifcvt optimized
into umin only with -g0 and not with -g - the function(s) use
prev_nonnote_insn, which without -g finds a real insn the code is looking
for, while with -g finds a DEBUG_INSN.
2021-06-10 Jakub Jelinek <jakub@redhat.com>
PR debug/100852
* ifcvt.c (noce_get_alt_condition, noce_try_abs): Use
prev_nonnote_nondebug_insn instead of prev_nonnote_insn.
* g++.dg/opt/pr100852.C: New test.
Diffstat (limited to 'gcc/ifcvt.c')
| -rw-r--r-- | gcc/ifcvt.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/gcc/ifcvt.c b/gcc/ifcvt.c index 6ee44cb..d086ce8 100644 --- a/gcc/ifcvt.c +++ b/gcc/ifcvt.c @@ -2398,7 +2398,7 @@ noce_get_alt_condition (struct noce_if_info *if_info, rtx target, rtx_insn *prev_insn; /* First, look to see if we put a constant in a register. */ - prev_insn = prev_nonnote_insn (if_info->cond_earliest); + prev_insn = prev_nonnote_nondebug_insn (if_info->cond_earliest); if (prev_insn && BLOCK_FOR_INSN (prev_insn) == BLOCK_FOR_INSN (if_info->cond_earliest) @@ -2669,7 +2669,7 @@ noce_try_abs (struct noce_if_info *if_info) if (REG_P (c)) { rtx set; - rtx_insn *insn = prev_nonnote_insn (earliest); + rtx_insn *insn = prev_nonnote_nondebug_insn (earliest); if (insn && BLOCK_FOR_INSN (insn) == BLOCK_FOR_INSN (earliest) && (set = single_set (insn)) |