[rustc.git] / compiler / rustc_error_codes / src / error_codes / E0663.md

An invalid input operand constraint was passed to the `llvm_asm` macro
(third line).

Erroneous code example:

```compile_fail,E0663
llvm_asm!("xor %eax, %eax"
          :
          : "+test"("a")
         );
```

Considering that this would be a long explanation, we instead recommend you
take a look at the [`llvm_asm`] chapter of the Unstable book:

[`llvm_asm`]: https://doc.rust-lang.org/stable/unstable-book/library-features/llvm-asm.html
Commit	Line	Data
ba9703b0 XL	1	An invalid input operand constraint was passed to the `llvm_asm` macro
ba9703b0 XL	2	(third line).
60c5eb7d XL	3
	4	Erroneous code example:
	5
	6	```compile_fail,E0663
ba9703b0 XL	7	llvm_asm!("xor %eax, %eax"
	8	:
	9	: "+test"("a")
	10	);
60c5eb7d XL	11	```
60c5eb7d XL	12
74b04a01	13	Considering that this would be a long explanation, we instead recommend you
f9f354fc	14	take a look at the [`llvm_asm`] chapter of the Unstable book:
74b04a01	15
29967ef6	16	[`llvm_asm`]: https://doc.rust-lang.org/stable/unstable-book/library-features/llvm-asm.html