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From: "yyc1992 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/95790] Incorrect static target dispatch
Date: Sat, 20 Jun 2020 19:26:16 +0000 [thread overview]
Message-ID: <bug-95790-4-g7ArKmKC5l@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-95790-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95790
--- Comment #3 from Yichao Yu <yyc1992 at gmail dot com> ---
And the assembly showing the correct dispatch is
.file "a.c"
.text
.p2align 4
.type _ZL3fooPKcj, @function
_ZL3fooPKcj:
.LFB0:
.cfi_startproc
movl $1, %eax
ret
.cfi_endproc
.LFE0:
.size _ZL3fooPKcj, .-_ZL3fooPKcj
.p2align 4
.type _ZL3fooPKcj.avx, @function
_ZL3fooPKcj.avx:
.LFB1:
.cfi_startproc
movl $2, %eax
ret
.cfi_endproc
.LFE1:
.size _ZL3fooPKcj.avx, .-_ZL3fooPKcj.avx
.p2align 4
.type _ZL3fooPKcj.avx512f, @function
_ZL3fooPKcj.avx512f:
.LFB2:
.cfi_startproc
movl $3, %eax
ret
.cfi_endproc
.LFE2:
.size _ZL3fooPKcj.avx512f, .-_ZL3fooPKcj.avx512f
.section .text.unlikely,"ax",@progbits
.LCOLDB0:
.text
.LHOTB0:
.p2align 4
.type _ZL3fooPKcj.resolver, @function
_ZL3fooPKcj.resolver:
.LFB6:
.cfi_startproc
subq $8, %rsp
.cfi_def_cfa_offset 16
call __cpu_indicator_init@PLT
movq __cpu_model@GOTPCREL(%rip), %rax
movl 12(%rax), %eax
testb $-128, %ah
je .L8
leaq _ZL3fooPKcj.avx512f(%rip), %rax
.L7:
addq $8, %rsp
.cfi_def_cfa_offset 8
ret
.cfi_endproc
.section .text.unlikely
.cfi_startproc
.type _ZL3fooPKcj.resolver.cold, @function
_ZL3fooPKcj.resolver.cold:
.LFSB6:
.L8:
.cfi_def_cfa_offset 16
testb $2, %ah
leaq _ZL3fooPKcj.avx(%rip), %rdx
leaq _ZL3fooPKcj(%rip), %rax
cmovne %rdx, %rax
jmp .L7
.cfi_endproc
.LFE6:
.text
.size _ZL3fooPKcj.resolver, .-_ZL3fooPKcj.resolver
.section .text.unlikely
.size _ZL3fooPKcj.resolver.cold, .-_ZL3fooPKcj.resolver.cold
.LCOLDE0:
.text
.LHOTE0:
.type _Z11_ZL3fooPKcjPKcj, @gnu_indirect_function
.set _Z11_ZL3fooPKcjPKcj,_ZL3fooPKcj.resolver
.p2align 4
.globl _Z3barv
.type _Z3barv, @function
_Z3barv:
.LFB3:
.cfi_startproc
pushq %r12
.cfi_def_cfa_offset 16
.cfi_offset 12, -16
xorl %r12d, %r12d
pushq %rbp
.cfi_def_cfa_offset 24
.cfi_offset 6, -24
pushq %rbx
.cfi_def_cfa_offset 32
.cfi_offset 3, -32
subq $4112, %rsp
.cfi_def_cfa_offset 4144
movq %fs:40, %rax
movq %rax, 4104(%rsp)
xorl %eax, %eax
movq %rsp, %rbx
leaq 4096(%rsp), %rbp
.p2align 4,,10
.p2align 3
.L12:
movq %rbx, %rdi
movl $1, %esi
addq $1, %rbx
call _Z11_ZL3fooPKcjPKcj@PLT
addl %eax, %r12d
cmpq %rbp, %rbx
jne .L12
movq 4104(%rsp), %rax
subq %fs:40, %rax
jne .L16
addq $4112, %rsp
.cfi_remember_state
.cfi_def_cfa_offset 32
movl %r12d, %eax
popq %rbx
.cfi_def_cfa_offset 24
popq %rbp
.cfi_def_cfa_offset 16
popq %r12
.cfi_def_cfa_offset 8
ret
.L16:
.cfi_restore_state
call __stack_chk_fail@PLT
.cfi_endproc
.LFE3:
.size _Z3barv, .-_Z3barv
.p2align 4
.globl _Z3barv.avx
.type _Z3barv.avx, @function
_Z3barv.avx:
.LFB4:
.cfi_startproc
pushq %r12
.cfi_def_cfa_offset 16
.cfi_offset 12, -16
xorl %r12d, %r12d
pushq %rbp
.cfi_def_cfa_offset 24
.cfi_offset 6, -24
pushq %rbx
.cfi_def_cfa_offset 32
.cfi_offset 3, -32
subq $4112, %rsp
.cfi_def_cfa_offset 4144
movq %fs:40, %rax
movq %rax, 4104(%rsp)
xorl %eax, %eax
movq %rsp, %rbx
leaq 4096(%rsp), %rbp
.p2align 4,,10
.p2align 3
.L18:
movq %rbx, %rdi
movl $1, %esi
addq $1, %rbx
call _Z11_ZL3fooPKcjPKcj@PLT
addl %eax, %r12d
cmpq %rbp, %rbx
jne .L18
movq 4104(%rsp), %rax
subq %fs:40, %rax
jne .L22
addq $4112, %rsp
.cfi_remember_state
.cfi_def_cfa_offset 32
movl %r12d, %eax
popq %rbx
.cfi_def_cfa_offset 24
popq %rbp
.cfi_def_cfa_offset 16
popq %r12
.cfi_def_cfa_offset 8
ret
.L22:
.cfi_restore_state
call __stack_chk_fail@PLT
.cfi_endproc
.LFE4:
.size _Z3barv.avx, .-_Z3barv.avx
.ident "GCC: (GNU) 10.1.0"
.section .note.GNU-stack,"",@progbits
next prev parent reply other threads:[~2020-06-20 19:26 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-20 19:08 [Bug ipa/95790] New: " yyc1992 at gmail dot com
2020-06-20 19:22 ` [Bug ipa/95790] " hjl.tools at gmail dot com
2020-06-20 19:25 ` yyc1992 at gmail dot com
2020-06-20 19:26 ` yyc1992 at gmail dot com [this message]
2020-06-20 20:33 ` hjl.tools at gmail dot com
2020-06-20 20:59 ` yyc1992 at gmail dot com
2020-06-20 22:36 ` hjl.tools at gmail dot com
2020-06-21 0:02 ` yyc1992 at gmail dot com
2020-06-21 0:12 ` yyc1992 at gmail dot com
2020-06-22 8:12 ` rguenth at gcc dot gnu.org
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