[Test] Add a regression test for failure introduced by 952ad4701cf0d8da79789f6b83ddaa...

diff --git a/llvm/test/Transforms/LoopRotate/freeze-crash.ll b/llvm/test/Transforms/LoopRotate/freeze-crash.ll
new file mode 100644 (file)
index 0000000..e32b858
--- /dev/null
+++ b/llvm/test/Transforms/LoopRotate/freeze-crash.ll
@@ -0,0 +1,24 @@
+; RUN: opt -loop-rotate -disable-output %s
+; RUN: opt -passes=rotate -disable-output %s
+
+; Make sure we don't crash on this test.
+define void @foo(i32* %arg) {
+bb:
+  %tmp = load i32, i32* %arg, align 4
+  br label %bb1
+
+bb1:                                              ; preds = %bb7, %bb
+  %tmp2 = phi i32 [ %tmp, %bb ], [ 1, %bb7 ]
+  %tmp3 = sub i32 0, %tmp2
+  %tmp4 = icmp ult i32 0, %tmp3
+  %tmp5 = freeze i1 %tmp4
+  br i1 %tmp5, label %bb7, label %bb6
+
+bb6:                                              ; preds = %bb1
+  ret void
+
+bb7:                                              ; preds = %bb1
+  %tmp8 = getelementptr inbounds i8, i8* undef, i64 8
+  br label %bb1
+}
+