https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120936
Bug ID: 120936
Summary: x86_function_profiler emits an unused label
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: liuhongt at gcc dot gnu.org
Target Milestone: ---
Target: x86-64
[hjl@gnu-tgl-3 tmp]$ cat t.c
void
foo (void)
{
}
[hjl@gnu-tgl-3 tmp]$ gcc -O2 -pg -S t.c
[hjl@gnu-tgl-3 tmp]$ cat t.s
.file "t.c"
.text
.p2align 4
.globl foo
.type foo, @function
foo:
.LFB0:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rsp, %rbp
.cfi_def_cfa_register 6
1: call mcount
^^ Why is it here?
popq %rbp
.cfi_def_cfa 7, 8
ret
.cfi_endproc
.LFE0:
.size foo, .-foo
.ident "GCC: (GNU) 15.1.1 20250521 (Red Hat 15.1.1-2)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-tgl-3 tmp]$ gcc -O2 -pg -S t.c -mfentry
[hjl@gnu-tgl-3 tmp]$ cat t.s
.file "t.c"
.text
.p2align 4
.globl foo
.type foo, @function
foo:
.LFB0:
.cfi_startproc
1: call __fentry__
^^ Why is it here?
ret
.cfi_endproc
.LFE0:
.size foo, .-foo
.ident "GCC: (GNU) 15.1.1 20250521 (Red Hat 15.1.1-2)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-tgl-3 tmp]$
