| Issue |
85387
|
| Summary |
[x86_64] X86_64 backend pass struct argument wrong due to align.
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
CoTinker
|
demo.c
```
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
typedef long long Tal4llong __attribute__((aligned (4)));
struct S271 {
int a;
Tal4llong b;
};
struct S271 s271;
void check271 (struct S271 arg) {
printf("arg.b:%llx\n", arg.b);
if (arg.b != s271.b)
printf("Fail\n");
}
int main (void) {
s271.b = 0x7ffffffff;
check271 (s271);
}
```
output:
https://godbolt.org/z/jP77GWad6
gcc
```
arg.b:7ffffffff
```
clang
```
arg.b:7f9cffffffff
Fail
```
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