https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109483
--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Richard Biener from comment #2)
> Note that clang seems to propagate the constant equivalence which we
> instead un-propagate. With -fdisable-tree-uncprop1 you'll get the
> expected code:
>
> foo:
> .LFB0:
> .cfi_startproc
> cmpl $-1, %edi
> je .L8
> .L2:
> movl $1, %eax
> ret
> .p2align 4,,10
> .p2align 3
> .L8:
> xorl %eax, %eax
> #APP
> # 6 "t.c" 1
> int3
> # 0 "" 2
> #NO_APP
> je .L2
> ret
Even the above is not optimal. I'd expect:
...
.L8:
#APP
# 6 "t.c" 1
int3
# 0 "" 2
#NO_APP
je .L2
xorl %eax, %eax
ret
