New testcase that SCCP miscompiles. Luckily this is extremely unlikely to

happen in practice, but IP-SCCP can trigger it.

llvm-svn: 18773

test/Regression/Transforms/SCCP/2004-12-10-UndefBranchBug.ll

@@ -0,0 +1,11 @@
+; RUN: llvm-as < %s | opt -sccp | llvm-dis | grep 'ret int 1'
+
+; This function definitely returns 1, even if we don't know the direction
+; of the branch.
+
+int %foo() {
+	br bool undef, label %T, label %T
+T:
+	%X = add int 0, 1
+	ret int %X
+}