Add XTEST codegen support

llvm-svn: 178083
diff --git a/llvm/test/CodeGen/X86/xtest.ll b/llvm/test/CodeGen/X86/xtest.ll
new file mode 100644
index 0000000..e85565e
--- /dev/null
+++ b/llvm/test/CodeGen/X86/xtest.ll
@@ -0,0 +1,11 @@
+; RUN: llc < %s -march=x86-64 -mattr=+rtm | FileCheck %s
+
+declare i32 @llvm.x86.xtest() nounwind
+
+define i32 @test_xtest() nounwind uwtable {
+entry:
+  %0 = tail call i32 @llvm.x86.xtest() nounwind
+  ret i32 %0
+; CHECK: test_xtest
+; CHECK: xtest
+}