1 files changed, 61 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/Hexagon/swp-multi-phi-refs.ll b/llvm/test/CodeGen/Hexagon/swp-multi-phi-refs.ll
new file mode 100644
index 00000000000..e6604651e2a
--- /dev/null
+++ b/llvm/test/CodeGen/Hexagon/swp-multi-phi-refs.ll
@@ -0,0 +1,61 @@
+; RUN: llc -march=hexagon -O3 < %s
+; REQUIRES: asserts
+
+; Test that we generate the correct names for Phis when there is
+; a Phi that references a Phi that references another Phi. For example,
+;  v6 = phi(v1, v9)
+;  v7 = phi(v0, v6)
+;  v8 = phi(v2, v7)
+
+; Function Attrs: nounwind
+define void @f0(i8* noalias nocapture readonly %a0, i32 %a1, i32 %a2, i8* noalias nocapture %a3, i32 %a4) #0 {
+b0:
+  %v0 = add i32 %a1, -1
+  %v1 = getelementptr inbounds i8, i8* %a0, i32 0
+  %v2 = getelementptr inbounds i8, i8* %a0, i32 undef
+  %v3 = getelementptr inbounds i8, i8* %a3, i32 0
+  br i1 undef, label %b1, label %b4
+
+b1:                                               ; preds = %b1, %b0
+  br i1 undef, label %b1, label %b2
+
+b2:                                               ; preds = %b1
+  %v4 = getelementptr inbounds i8, i8* %a0, i32 undef
+  br label %b3
+
+b3:                                               ; preds = %b3, %b2
+  %v5 = phi i8* [ %v10, %b3 ], [ %v3, %b2 ]
+  %v6 = phi i8* [ %v25, %b3 ], [ %v4, %b2 ]
+  %v7 = phi i8* [ %v6, %b3 ], [ %v2, %b2 ]
+  %v8 = phi i8* [ %v7, %b3 ], [ %v1, %b2 ]
+  %v9 = phi i32 [ %v26, %b3 ], [ 1, %b2 ]
+  %v10 = getelementptr inbounds i8, i8* %v5, i32 %a4
+  %v11 = getelementptr inbounds i8, i8* %v8, i32 -1
+  %v12 = load i8, i8* %v11, align 1, !tbaa !0
+  %v13 = zext i8 %v12 to i32
+  %v14 = add nuw nsw i32 %v13, 0
+  %v15 = add nuw nsw i32 %v14, 0
+  %v16 = add nuw nsw i32 %v15, 0
+  %v17 = load i8, i8* %v6, align 1, !tbaa !0
+  %v18 = zext i8 %v17 to i32
+  %v19 = add nuw nsw i32 %v16, %v18
+  %v20 = add nuw nsw i32 %v19, 0
+  %v21 = mul nsw i32 %v20, 7282
+  %v22 = add nsw i32 %v21, 32768
+  %v23 = lshr i32 %v22, 16
+  %v24 = trunc i32 %v23 to i8
+  store i8 %v24, i8* %v10, align 1, !tbaa !0
+  %v25 = getelementptr inbounds i8, i8* %v6, i32 %a2
+  %v26 = add i32 %v9, 1
+  %v27 = icmp eq i32 %v26, %v0
+  br i1 %v27, label %b4, label %b3
+
+b4:                                               ; preds = %b3, %b0
+  ret void
+}
+
+attributes #0 = { nounwind "target-cpu"="hexagonv55" }
+
+!0 = !{!1, !1, i64 0}
+!1 = !{!"omnipotent char", !2, i64 0}
+!2 = !{!"Simple C/C++ TBAA"}