https://bugs.llvm.org/show_bug.cgi?id=34317
Bug ID: 34317
Summary: wasm32-unknown-unknown-wasm target generated invalid
code
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: WebAssembly
Assignee: unassignedb...@nondot.org
Reporter: s...@chromium.org
CC: llvm-bugs@lists.llvm.org
For the following C problems the wasm32-unknown-unknown-wasm generates invalid
wasm in that it includes an extra get_local which means that that type stack is
not empty when the function returns:
```
int main()
{
int c = 1;
asm(""::"r"(c));
return 0;
}
```
With wasm32-unknown-unknown-wasm:
000043 <main>:
000047: 41 01 | i32.const 1
000049: 21 00 | set_local 0
00004b: 20 00 | get_local 0
00004d: 41 00 | i32.const 0
00004f: 0b | end
With wasm32-unknown-unknown-elf:
000034 func[0]:
000038: 41 01 | i32.const 1
00003a: 21 00 | set_local 0
00003c: 41 00 | i32.const 0
00003e: 0b | end
The result of running the back code in wasm-interp is:
error: type stack at end of function is 1, expected 0
000004d: error: EndFunctionBody callback failed
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