http://llvm.org/bugs/show_bug.cgi?id=15211
Bug ID: 15211
Summary: Clang doesn't react to some constraints in inline asm
instructions
Product: clang
Version: 3.2
Hardware: PC
OS: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
We can write simple test:
void f() {
register int in asm("ebx") = 0;
__asm("test %h0, %h0" : : "A"(in));
}
and watch clang's assembler for it.
We will see:
movl $0, -12(%rbp)
movl -12(%rbp), %ebx
## InlineAsm Start
test %bh, %bh
## InlineAsm End
But constraint "A" says, that input parameter must be placed in eax.
Other constraints have the same errors.
--
Software Engineer
Intel Compiler Team
Intel Corp.
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