1 files changed, 46 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/Hexagon/swp-loop-carried.ll b/llvm/test/CodeGen/Hexagon/swp-loop-carried.ll
new file mode 100644
index 00000000000..062ea3ba492
--- /dev/null
+++ b/llvm/test/CodeGen/Hexagon/swp-loop-carried.ll
@@ -0,0 +1,46 @@
+; RUN: llc -march=hexagon -fp-contract=fast -enable-pipeliner < %s
+; REQUIRES: asserts
+
+; A Phi that depends on another Phi is loop carried.
+
+define void @f0() #0 {
+b0:
+  br label %b1
+
+b1:                                               ; preds = %b1, %b0
+  br i1 undef, label %b1, label %b2
+
+b2:                                               ; preds = %b1
+  br i1 undef, label %b3, label %b8
+
+b3:                                               ; preds = %b2
+  br i1 undef, label %b4, label %b5
+
+b4:                                               ; preds = %b4, %b3
+  %v0 = phi i32 [ %v5, %b4 ], [ 2, %b3 ]
+  %v1 = phi float [ %v4, %b4 ], [ undef, %b3 ]
+  %v2 = phi float [ %v1, %b4 ], [ undef, %b3 ]
+  %v3 = fsub float 0.000000e+00, %v2
+  %v4 = fadd float %v3, undef
+  %v5 = add nsw i32 %v0, 1
+  %v6 = icmp eq i32 %v5, undef
+  br i1 %v6, label %b5, label %b4
+
+b5:                                               ; preds = %b4, %b3
+  %v7 = phi float [ undef, %b3 ], [ %v1, %b4 ]
+  br i1 false, label %b6, label %b7
+
+b6:                                               ; preds = %b5
+  br label %b7
+
+b7:                                               ; preds = %b6, %b5
+  br label %b9
+
+b8:                                               ; preds = %b2
+  ret void
+
+b9:                                               ; preds = %b9, %b7
+  br label %b9
+}
+
+attributes #0 = { nounwind "target-cpu"="hexagonv55" }