New testcase for bug

llvm-svn: 2670

test/Regression/Transforms/SCCP/2002-05-20-MissedIncomingValue.ll

@@ -0,0 +1,20 @@
+; This test shows a case where SCCP is incorrectly eliminating the PHI node
+; because it thinks it has a constant 0 value, when it really doesn't.
+
+; RUN: as < %s | opt -sccp | dis | grep phi
+
+int "test"(int %A, bool %c) {
+bb1:
+	br label %BB2
+BB2:
+	%V = phi int [0, %bb1], [%A, %BB4]
+	br label %BB3
+
+BB3:
+	br bool %c, label %BB4, label %BB5
+BB4:
+	br label %BB2
+
+BB5:
+	ret int %V
+}