| Issue |
127580
|
| Summary |
[X86][InlineAsm] Unsupported operand in inline asm
|
| Labels |
backend:X86,
rejects-valid,
inline-asm
|
| Assignees |
|
| Reporter |
dtcxzyw
|
Reproducer from nuttx: https://godbolt.org/z/eh9z5W4Kr
https://github.com/apache/nuttx/blob/954081cdd87c7b58bd2da2134c7f2eb112eef67f/arch/x86_64/include/irq.h#L142-L150
```
bool up_interrupt_context(void)
{
bool flag;
__asm__ volatile("movb %%gs:(%c1), %0"
: "=qm" (flag)
: "i" (7));
return flag;
}
```
GCC output:
```
up_interrupt_context():
movb %gs:(7), al
ret
```
Clang output:
```
<source>:4:20: error: invalid operand for instruction
4 | __asm__ volatile("movb %%gs:(%c1), %0"
| ^
<inline asm>:1:16: note: instantiated into assembly here
1 | movb %gs:(7), -1(%rbp)
| ^~~~~~~~
1 error generated.
Compiler returned: 1
```
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