new (undefined) testcase, distilled from 126.gcc that scalarrepl crashes on

llvm-svn: 24707

llvm/test/Regression/Transforms/ScalarRepl/2005-12-14-UnionPromoteCrash.ll

@@ -0,0 +1,34 @@
+; RUN: llvm-as < %s | opt -scalarrepl -disable-output
+target endian = big
+target pointersize = 32
+	%struct.rtx_def = type { [2 x ubyte], int, [1 x %union.rtunion_def] }
+	%union.rtunion_def = type { uint }
+
+implementation   ; Functions:
+
+void %find_reloads() {
+entry:
+	%c_addr.i = alloca sbyte		; <sbyte*> [#uses=1]
+	switch uint 0, label %return [
+		 uint 36, label %label.7
+		 uint 34, label %label.7
+		 uint 41, label %label.5
+	]
+
+label.5:		; preds = %entry
+	ret void
+
+label.7:		; preds = %entry, %entry
+	br bool false, label %then.4, label %switchexit.0
+
+then.4:		; preds = %label.7
+	%tmp.0.i = cast sbyte* %c_addr.i to int*		; <int*> [#uses=1]
+	store int 44, int* %tmp.0.i
+	ret void
+
+switchexit.0:		; preds = %label.7
+	ret void
+
+return:		; preds = %entry
+	ret void
+}