https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119473
Bug ID: 119473
Summary: [15 Regression] __builtin_ia32_vaesdec_v32qi() emits
wrong base register with -mvaes -O2 -mapxf -m64
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: lin1.hu at intel dot com
Target Milestone: ---
Created attachment 60887
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=60887&action=edit
testcase
$gcc test.c -m64 -O2 -mapxf -mvaes -S -o test.s
$cat test.s
.file "test.c"
.text
.p2align 4
.globl foo
.type foo, @function
foo:
.LFB0:
.cfi_startproc
vmovdqa (%rcx), %ymm0
vaesdec (%r26), %ymm0, %ymm0
vmovdqa %ymm0, (%rdx)
vmovdqa (%rcx), %ymm0
vaesdeclast (%r26), %ymm0, %ymm0
vmovdqa %ymm0, (%rdx)
vmovdqa (%rcx), %ymm0
vaesenc (%r26), %ymm0, %ymm0
vmovdqa %ymm0, (%rdx)
vmovdqa (%rcx), %ymm0
vaesenclast (%r26), %ymm0, %ymm0
vmovdqa %ymm0, (%rdx)
vzeroupper
ret
.cfi_endproc
.LFE0:
.size foo, .-foo
.ident "GCC: (GNU) 15.0.1 20250324 (experimental)"
.section .note.GNU-stack,"",@progbits
Due to without -mavx512vl, according to pattern vaesdec_<mode>'s constraint
"xjm,vm", (%r26) is invalid.
