https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70734
--- Comment #7 from Marc Glisse ---
(In reply to Richard Biener from comment #3)
> It's not unused, it's stored to memory.
Of course, I read the testcase too quickly and thought *r was a throw-away
local variable... Sorry about that.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70734
Jakub Jelinek changed:
What|Removed |Added
CC||jakub at gcc dot gnu.org
--- Comment #6
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70734
Richard Biener changed:
What|Removed |Added
Status|UNCONFIRMED |RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70734
--- Comment #4 from Armin Rigo ---
Ah, sorry about that; I only checked the 5.x branch. My mistake.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70734
--- Comment #3 from Richard Biener ---
(In reply to Marc Glisse from comment #2)
> (In reply to Marc Glisse from comment #1)
> > movl%edi, (%rdx)
>
> Looks like we fail to notice that the result of the addition is unused and
> keep this
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70734
--- Comment #2 from Marc Glisse ---
(In reply to Marc Glisse from comment #1)
> movl%edi, (%rdx)
Looks like we fail to notice that the result of the addition is unused and keep
this dead store...
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70734
--- Comment #1 from Marc Glisse ---
gcc-6 produces
.cfi_startproc
addl%esi, %edi
movl%edi, (%rdx)
jo .L9
rep ret
.L9:
pushq %rax
.cfi_def_cfa_offset 16
callabort
