https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120427
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2025-05-24
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
[hjl@gnu-zen4-1 pr117839]$ cat dl-2.c
struct __pthread_mutex_s
{
int __lock;
unsigned int __count;
int __owner;
unsigned int __nusers;
int __kind;
short __spins;
short __elision;
void *p[2];
};
typedef union
{
struct __pthread_mutex_s __data;
char __size[40];
long int __align;
} pthread_mutex_t;
typedef struct { pthread_mutex_t mutex; } __rtld_lock_recursive_t;
void
foo (__rtld_lock_recursive_t *lock, int i)
{
lock[i] = (__rtld_lock_recursive_t) {{ { 0, 0, 0, 0, 1,
0, 0, { ((void *)0) , ((void *)0) } } }};
}
[hjl@gnu-zen4-1 pr117839]$ make dl-2.s
/export/build/gnu/tools-build/gcc-debug/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/tools-build/gcc-debug/build-x86_64-linux/gcc/ -O2 -fPIC
-mtune=sapphirerapids -S dl-2.c
[hjl@gnu-zen4-1 pr117839]$ cat dl-2.s
.file "dl-2.c"
.text
.p2align 4
.globl foo
.type foo, @function
foo:
.LFB0:
.cfi_startproc
movslq %esi, %rsi
pxor %xmm0, %xmm0
leaq (%rsi,%rsi,4), %rax
movq $1, 16(%rdi,%rax,8)
andq $0, (%rdi,%rax,8)
andq $0, 8(%rdi,%rax,8)
movups %xmm0, 24(%rdi,%rax,8)
ret
.cfi_endproc
.LFE0:
.size foo, .-foo
.ident "GCC: (GNU) 16.0.0 20250524 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-zen4-1 pr117839]$
