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* [Bug other/56631] New: duplicated sse code in switch
@ 2013-03-16 11:35 neleai at seznam dot cz
2013-03-16 11:36 ` [Bug other/56631] " neleai at seznam dot cz
2021-12-05 10:37 ` [Bug tree-optimization/56631] " pinskia at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: neleai at seznam dot cz @ 2013-03-16 11:35 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56631
Bug #: 56631
Summary: duplicated sse code in switch
Classification: Unclassified
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: neleai@seznam.cz
Consider attached testcase. When compiled with -Os,-O2,-O3 it duplicates
zeroing xmm1 register across all branches. Moving zeroing before braches will
save space.
Relevant assembly at -Os is
jmp *.L19(,%rax,8)
.section .rodata
.align 8
.align 4
.L19:
.quad .L21
.quad .L4
.quad .L5
snip
.L21:
xorps %xmm1, %xmm1
.L38:
movaps %xmm0, %xmm2
pcmpeqb %xmm1, %xmm2
pmovmskb %xmm2, %eax
testl %eax, %eax
jne .L1
.L2:
movdqu %xmm0, (%rdi)
addq $64, %rdi
movups 64(%rsi), %xmm0
addq $64, %rsi
jmp .L38
.L4:
xorps %xmm1, %xmm1
incq %rdi
.L23:
snip
.L5:
xorps %xmm1, %xmm1
addq $2, %rdi
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug other/56631] duplicated sse code in switch
2013-03-16 11:35 [Bug other/56631] New: duplicated sse code in switch neleai at seznam dot cz
@ 2013-03-16 11:36 ` neleai at seznam dot cz
2021-12-05 10:37 ` [Bug tree-optimization/56631] " pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: neleai at seznam dot cz @ 2013-03-16 11:36 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56631
--- Comment #1 from Ondrej Bilka <neleai at seznam dot cz> 2013-03-16 11:36:04 UTC ---
Created attachment 29678
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29678
testcase
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug tree-optimization/56631] duplicated sse code in switch
2013-03-16 11:35 [Bug other/56631] New: duplicated sse code in switch neleai at seznam dot cz
2013-03-16 11:36 ` [Bug other/56631] " neleai at seznam dot cz
@ 2021-12-05 10:37 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-12-05 10:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56631
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|UNCONFIRMED |RESOLVED
Component|target |tree-optimization
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Fixed in GCC 7 by an extra copy loop header.
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-12-05 10:37 UTC | newest]
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2013-03-16 11:35 [Bug other/56631] New: duplicated sse code in switch neleai at seznam dot cz
2013-03-16 11:36 ` [Bug other/56631] " neleai at seznam dot cz
2021-12-05 10:37 ` [Bug tree-optimization/56631] " pinskia at gcc dot gnu.org
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