[LLVMbugs] [Bug 20091] Intel dialect x86 assembly matching is ambiguous for single memory operand instructions, resulting in 16-bit instructions
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Tue Aug 26 13:44:13 PDT 2014
http://llvm.org/bugs/show_bug.cgi?id=20091
Reid Kleckner <rnk at google.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |FIXED
--- Comment #23 from Reid Kleckner <rnk at google.com> ---
Fixed in r216481.
$ cat t.cpp
void
NS_InvokeByIndex(void* that, unsigned int methodIndex)
{
__asm {
mov edx,[that] // vtable in edx
mov eax,methodIndex
call [edx][eax*4] // stdcall, i.e. callee cleans up stack.
}
}
$ clang -cc1 t.cpp -S -fms-extensions -o - | grep call
calll *(%edx,%eax,4)
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