Implement -mno-sse: if SSE is disabled on x86-64, don't store XMM on stack for
var-args, and don't allow FP return values


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63495 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86Subtarget.cpp b/lib/Target/X86/X86Subtarget.cpp
index 7034c55..ff7f72b 100644
--- a/lib/Target/X86/X86Subtarget.cpp
+++ b/lib/Target/X86/X86Subtarget.cpp
@@ -331,7 +331,7 @@
   // are enabled.  These are available on all x86-64 CPUs.
   if (Is64Bit) {
     HasX86_64 = true;
-#if 1
+#if 0
      if (X86SSELevel < SSE2)
        X86SSELevel = SSE2;
 #endif