Short-term workaround for frame-related weirdness on win64.
Some other minor win64 fixes as well.

Patch by Michael Beck!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80370 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86Subtarget.cpp b/lib/Target/X86/X86Subtarget.cpp
index 51048a9..7308728 100644
--- a/lib/Target/X86/X86Subtarget.cpp
+++ b/lib/Target/X86/X86Subtarget.cpp
@@ -160,7 +160,7 @@
 /// specified arguments.  If we can't run cpuid on the host, return true.
 bool X86::GetCpuIDAndInfo(unsigned value, unsigned *rEAX, unsigned *rEBX,
                           unsigned *rECX, unsigned *rEDX) {
-#if defined(__x86_64__) || defined(_M_AMD64)
+#if defined(__x86_64__) || defined(_M_AMD64) || defined (_M_X64)
   #if defined(__GNUC__)
     // gcc doesn't know cpuid would clobber ebx/rbx. Preseve it manually.
     asm ("movq\t%%rbx, %%rsi\n\t"