| Issue |
150737
|
| Summary |
[RegAlloc][AArch64] Missed optimizate for register spill
|
| Labels |
|
| Assignees |
|
| Reporter |
hstk30-hw
|
https://godbolt.org/z/z4MrMcW4j
```
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef unsigned int uint32_t;
typedef unsigned long int uint64_t;
typedef struct param_s {
void *a;
uint32_t b;
uint32_t c;
uint8_t d : 1;
} param_t;
typedef _Bool (*IsEnabled)();
typedef struct {
IsEnabled Enabled;
} FuncCb;
extern FuncCb g_hookFunc;
uint64_t bar(void *flow, uint16_t type);
uint64_t fuzz(void *flow, uint32_t syncType);
uint64_t bob(void *flow);
void foo(param_t *param)
{
if (param->a == ((void*)0)) {
return;
}
if (__builtin_expect(!!(param->b != 0), 0)) {
(void)fuzz(param->a, param->b);
}
if (__builtin_expect(!!(param->c != 0), 0)) {
if (g_hookFunc.Enabled()) {
(void)bar(param->a, (uint16_t)param->c);
}
}
if (__builtin_expect(!!(param->d != 0), 0)) {
(void)bob(param->a);
}
return;
}
```
For this case, LLVM spill X19 to stack, GCC 15 has optimizated it.
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