Unbreaking the non-x86 build bots by protecting the AVX test code properly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180992 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86Subtarget.cpp b/lib/Target/X86/X86Subtarget.cpp
index 90e6b70..b2eff5e 100644
--- a/lib/Target/X86/X86Subtarget.cpp
+++ b/lib/Target/X86/X86Subtarget.cpp
@@ -171,6 +171,7 @@
 }
 
 static bool OSHasAVXSupport() {
+#if defined(i386) || defined(__i386__) || defined(__x86__) || defined(_M_IX86)
 #if defined(__GNUC__)
   // Check xgetbv; this uses a .byte sequence instead of the instruction
   // directly because older assemblers do not include support for xgetbv and
@@ -183,6 +184,9 @@
   int rEAX = 0; // Ensures we return false
 #endif
   return (rEAX & 6) == 6;
+#else
+  return false;
+#endif
 }
 
 void X86Subtarget::AutoDetectSubtargetFeatures() {