1 files changed, 79 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/Hexagon/loop-rotate-bug.ll b/llvm/test/CodeGen/Hexagon/loop-rotate-bug.ll
new file mode 100644
index 00000000000..f49f782f8a1
--- /dev/null
+++ b/llvm/test/CodeGen/Hexagon/loop-rotate-bug.ll
@@ -0,0 +1,79 @@
+; RUN: llc -march=hexagon < %s | FileCheck %s
+
+; CHECK: cmp.eq
+; CHECK: cmp.eq
+; CHECK: cmp.eq
+; CHECK: cmp.eq
+
+%s.0 = type { i8*, i32, %s.0* }
+
+@g0 = external global %s.0**, align 4
+@g1 = private global [4 x i64] zeroinitializer, section "__llvm_prf_cnts", align 8
+
+declare void @f0(%s.0*)
+
+define i32 @f1() #0 {
+b0:
+  %v0 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @g1, i32 0, i32 0), align 8
+  %v1 = add i64 %v0, 1
+  store i64 %v1, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @g1, i32 0, i32 0), align 8
+  br label %b1
+
+b1:                                               ; preds = %b6, %b0
+  %v2 = phi i32 [ 0, %b0 ], [ %v27, %b6 ]
+  %v3 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @g1, i32 0, i32 1), align 8
+  %v4 = add i64 %v3, 1
+  store i64 %v4, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @g1, i32 0, i32 1), align 8
+  %v5 = load %s.0**, %s.0*** @g0, align 4
+  %v6 = getelementptr inbounds %s.0*, %s.0** %v5, i32 %v2
+  %v7 = load %s.0*, %s.0** %v6, align 4
+  %v8 = icmp eq %s.0* %v7, null
+  br i1 %v8, label %b6, label %b2
+
+b2:                                               ; preds = %b1
+  %v9 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @g1, i32 0, i32 2), align 8
+  %v10 = add i64 %v9, 1
+  store i64 %v10, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @g1, i32 0, i32 2), align 8
+  %v11 = bitcast %s.0* %v7 to %s.0*
+  %v12 = getelementptr inbounds %s.0, %s.0* %v11, i32 0, i32 2
+  %v13 = load %s.0*, %s.0** %v12, align 4
+  %v14 = icmp eq %s.0* %v13, null
+  %v15 = getelementptr inbounds %s.0, %s.0* %v11, i32 0, i32 2
+  br i1 %v14, label %b5, label %b3
+
+b3:                                               ; preds = %b2
+  br label %b4
+
+b4:                                               ; preds = %b4, %b3
+  %v16 = phi %s.0** [ %v25, %b4 ], [ %v15, %b3 ]
+  %v17 = phi %s.0* [ %v20, %b4 ], [ %v7, %b3 ]
+  %v18 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @g1, i32 0, i32 3), align 8
+  %v19 = add i64 %v18, 1
+  store i64 %v19, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @g1, i32 0, i32 3), align 8
+  %v20 = load %s.0*, %s.0** %v16, align 4
+  tail call void @f0(%s.0* %v17)
+  %v21 = bitcast %s.0* %v20 to %s.0*
+  %v22 = getelementptr inbounds %s.0, %s.0* %v21, i32 0, i32 2
+  %v23 = load %s.0*, %s.0** %v22, align 4
+  %v24 = icmp eq %s.0* %v23, null
+  %v25 = getelementptr inbounds %s.0, %s.0* %v21, i32 0, i32 2
+  br i1 %v24, label %b5, label %b4
+
+b5:                                               ; preds = %b4, %b2
+  %v26 = phi %s.0* [ %v7, %b2 ], [ %v20, %b4 ]
+  tail call void @f0(%s.0* %v26)
+  br label %b6
+
+b6:                                               ; preds = %b5, %b1
+  %v27 = add nuw nsw i32 %v2, 1
+  %v28 = icmp eq i32 %v27, 3001
+  br i1 %v28, label %b7, label %b1
+
+b7:                                               ; preds = %b6
+  %v29 = load %s.0*, %s.0** bitcast (%s.0*** @g0 to %s.0**), align 4
+  tail call void @f0(%s.0* %v29)
+  ret i32 undef
+}
+
+attributes #0 = { nounwind "target-cpu"="hexagonv60" }
+