Reduced testcase for PR1594

llvm-svn: 40740

llvm/test/Transforms/InstCombine/2007-08-02-InfiniteLoop.ll

@@ -0,0 +1,10 @@
+; RUN: llvm-as < %s | opt -instcombine -disable-output
+; PR1594
+
+define i64 @test(i16 %tmp510, i16 %tmp512) {
+	%W = sext i16 %tmp510 to i32           ; <i32> [#uses=1]
+        %X = sext i16 %tmp512 to i32           ; <i32> [#uses=1]
+        %Y = add i32 %W, %X               ; <i32> [#uses=1]
+        %Z = sext i32 %Y to i64          ; <i64> [#uses=1]
+	ret i64 %Z
+}