| Issue |
148166
|
| Summary |
riscv64: `preserve_mostcc`is not supported
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
folkertdev
|
see https://godbolt.org/z/13qTn3bTa
```llvm
target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n32:64-S128"
target triple = "riscv64-unknown-linux-gnu"
define preserve_mostcc void @foo(ptr align 8 %_1) unnamed_addr {
start:
ret void
}
```
Many architectures do support the `preserve_mostcc` calling convention (or at least do not crash on it), e.g. x86, aarch64, arm, wasm, s390x and powerpc.
This came up in https://github.com/rust-lang/rust/issues/143319
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