| Issue |
55514
|
| Summary |
riscv missing support for tied operands in inline asm
|
| Labels |
backend:RISC-V
|
| Assignees |
|
| Reporter |
nickdesaulniers
|
example:
```c
void foo (void) {
int bar;
asm("# foo":"+r"(bar) : "0"(bar));
}
```
```
$ clang -O2 --target=riscv64--
<source>:3:29: error: invalid input constraint '0' in asm
asm("# foo":"+r"(bar) : "0"(bar));
^
```
Curiously, this code produces an error for riscv gcc unless optimizations are enabled. via
https://github.com/ClangBuiltLinux/linux/issues/1641
cc @nathanchance @topperc @asb
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