diff --git a/test/CodeGen/PowerPC/compare-duplicate.ll b/test/CodeGen/PowerPC/compare-duplicate.ll
new file mode 100644
index 00000000000..784f2ac9a51
--- /dev/null
+++ b/test/CodeGen/PowerPC/compare-duplicate.ll
@@ -0,0 +1,11 @@
+; RUN: llvm-as < %s | llc | not grep slwi
+
+define i32 @test(i32 %A, i32 %B) {
+	%C = sub i32 %B, %A
+	%D = icmp eq i32 %C, %A
+	br i1 %D, label %T, label %F
+T:
+	ret i32 19123
+F:
+	ret i32 %C
+}