1 files changed, 67 insertions, 0 deletions
diff --git a/llvm/test/Transforms/SimpleLoopUnswitch/crash.ll b/llvm/test/Transforms/SimpleLoopUnswitch/crash.ll
new file mode 100644
index 00000000000..cf6a19d2540
--- /dev/null
+++ b/llvm/test/Transforms/SimpleLoopUnswitch/crash.ll
@@ -0,0 +1,67 @@
+; RUN: opt < %s -simple-loop-unswitch -disable-output
+; RUN: opt < %s -simple-loop-unswitch -enable-mssa-loop-dependency=true -verify-memoryssa -disable-output
+
+define void @test1(i32* %S2) {
+entry:
+	br i1 false, label %list_Length.exit, label %cond_true.i
+cond_true.i:		; preds = %entry
+	ret void
+list_Length.exit:		; preds = %entry
+	br i1 false, label %list_Length.exit9, label %cond_true.i5
+cond_true.i5:		; preds = %list_Length.exit
+	ret void
+list_Length.exit9:		; preds = %list_Length.exit
+	br i1 false, label %bb78, label %return
+bb44:		; preds = %bb78, %cond_next68
+	br i1 %tmp49.not, label %bb62, label %bb62.loopexit
+bb62.loopexit:		; preds = %bb44
+	br label %bb62
+bb62:		; preds = %bb62.loopexit, %bb44
+	br i1 false, label %return.loopexit, label %cond_next68
+cond_next68:		; preds = %bb62
+	br i1 false, label %return.loopexit, label %bb44
+bb78:		; preds = %list_Length.exit9
+	%tmp49.not = icmp eq i32* %S2, null		; <i1> [#uses=1]
+	br label %bb44
+return.loopexit:		; preds = %cond_next68, %bb62
+	%retval.0.ph = phi i32 [ 1, %cond_next68 ], [ 0, %bb62 ]		; <i32> [#uses=1]
+	br label %return
+return:		; preds = %return.loopexit, %list_Length.exit9
+	%retval.0 = phi i32 [ 0, %list_Length.exit9 ], [ %retval.0.ph, %return.loopexit ]		; <i32> [#uses=0]
+	ret void
+}
+
+define void @test2() nounwind {
+entry:
+  br label %bb.nph
+
+bb.nph:                                           ; preds = %entry
+  %and.i13521 = and <4 x i1> undef, undef         ; <<4 x i1>> [#uses=1]
+  br label %for.body
+
+for.body:                                         ; preds = %for.body, %bb.nph
+  %or.i = select <4 x i1> %and.i13521, <4 x i32> undef, <4 x i32> undef ; <<4 x i32>> [#uses=0]
+  br i1 false, label %for.body, label %for.end
+
+for.end:                                          ; preds = %for.body, %entry
+  ret void
+}
+
+; PR6879
+define i32* @test3(i32** %p_45, i16 zeroext %p_46, i64 %p_47, i64 %p_48, i16 signext %p_49) nounwind {
+entry:
+  br label %for.cond
+
+for.cond:                                         ; preds = %for.cond4, %entry
+  br i1 false, label %for.cond4, label %for.end88
+
+for.cond4:                                        ; preds = %for.cond
+  %conv46 = trunc i32 0 to i8                     ; <i8> [#uses=2]
+  %cmp60 = icmp sgt i8 %conv46, 124               ; <i1> [#uses=1]
+  %or.cond = and i1 undef, %cmp60                 ; <i1> [#uses=1]
+  %cond = select i1 %or.cond, i8 %conv46, i8 undef ; <i8> [#uses=0]
+  br label %for.cond
+
+for.end88:                                        ; preds = %for.cond
+  ret i32* undef
+}