[ms-inline asm] Add test case for r172121. 
Part of rdar://12991541


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172122 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/ms-inline-asm.c b/test/CodeGen/ms-inline-asm.c
index af88cc1..5031722 100644
--- a/test/CodeGen/ms-inline-asm.c
+++ b/test/CodeGen/ms-inline-asm.c
@@ -239,3 +239,10 @@
 // CHECK: t23
 // CHECK: call void asm sideeffect inteldialect "the_label:", "~{dirflag},~{fpsr},~{flags}"() nounwind
 }
+
+void t24_helper(void) {}
+void t24() {
+  __asm call t24_helper
+// CHECK: t24
+// CHECK: call void asm sideeffect inteldialect "call $0", "r,~{dirflag},~{fpsr},~{flags}"(void ()* @t24_helper) nounwind
+}