https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117098
Bug ID: 117098
Summary: Tail call doesn't work for x32
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
Target: x86-64
[hjl@gnu-tgl-3 tmp]$ cat x.c
struct A { int a[6]; void *p[7]; };
int baz (int a, int b, int c, void *p, struct A s);
int
foo (int a, int b, int c, void *p, struct A s)
{
return baz (a, b, c, p, s);
}
[hjl@gnu-tgl-3 tmp]$ gcc -S -O2 -mx32 /tmp/x.c
[hjl@gnu-tgl-3 tmp]$ cat x.s
.file "x.c"
.text
.p2align 4
.globl foo
.type foo, @function
foo:
.LFB0:
.cfi_startproc
subl $72, %esp
.cfi_def_cfa_offset 80
movdqu 80(%rsp), %xmm0
movl 128(%rsp), %eax
movups %xmm0, (%rsp)
movdqu 96(%rsp), %xmm0
movl %eax, 48(%rsp)
movups %xmm0, 16(%rsp)
movdqu 112(%rsp), %xmm0
movups %xmm0, 32(%rsp)
call baz
addl $72, %esp
.cfi_def_cfa_offset 8
ret
.cfi_endproc
.LFE0:
.size foo, .-foo
.ident "GCC: (GNU) 14.2.1 20240912 (Red Hat 14.2.1-3)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-tgl-3 tmp]$ gcc -S -O2 -m64 /tmp/x.c
[hjl@gnu-tgl-3 tmp]$ cat x.s
.file "x.c"
.text
.p2align 4
.globl foo
.type foo, @function
foo:
.LFB0:
.cfi_startproc
jmp baz
.cfi_endproc
.LFE0:
.size foo, .-foo
.ident "GCC: (GNU) 14.2.1 20240912 (Red Hat 14.2.1-3)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-tgl-3 tmp]$
