http://llvm.org/bugs/show_bug.cgi?id=17201
Bug ID: 17201
Summary: MS inline assembly should assume asm block sets the
return value.
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: LLVM Codegen
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
consider:
inline void nothin(void) {
__asm { nop }
}
int main() {
nothin();
}
MSVC codegens this as:
_main PROC ; COMDAT
npad 1
ret 0
_main ENDP
if you comment out the asm in 'nothin', you get:
_main PROC ; COMDAT
xor eax, eax
ret 0
_main ENDP
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