1 files changed, 57 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/Hexagon/swp-xxh2.ll b/llvm/test/CodeGen/Hexagon/swp-xxh2.ll
new file mode 100644
index 00000000000..55f39e263d5
--- /dev/null
+++ b/llvm/test/CodeGen/Hexagon/swp-xxh2.ll
@@ -0,0 +1,57 @@
+; RUN: llc -march=hexagon -enable-pipeliner -debug-only=pipeliner < %s -o - 2>&1 > /dev/null | FileCheck %s
+; REQUIRES: asserts
+
+; Fix bug when pipelining xxh benchmark at O3, mv55, and with vectorization.
+; The problem is choosing the correct name for the Phis in the epilog.
+
+; CHECK: New block
+; CHECK: %{{.*}}, %[[REG:([0-9]+)]]{{.*}} = L2_loadri_pi
+; CHECK: epilog:
+; CHECK: = PHI
+; CHECK-NOT: = PHI %{{[0-9]+}}, {{.*}}, %[[REG]]
+; CHECK: = PHI
+
+; Function Attrs: nounwind
+define void @f0(i32 %a0, i32* %a1) #0 {
+b0:
+  %v0 = ashr i32 %a0, 1
+  br label %b1
+
+b1:                                               ; preds = %b1, %b0
+  %v1 = phi i64 [ %v8, %b1 ], [ undef, %b0 ]
+  %v2 = phi i32 [ %v9, %b1 ], [ 0, %b0 ]
+  %v3 = phi i32 [ %v7, %b1 ], [ undef, %b0 ]
+  %v4 = inttoptr i32 %v3 to i32*
+  %v5 = load i32, i32* %v4, align 4, !tbaa !0
+  %v6 = tail call i64 @llvm.hexagon.S2.packhl(i32 %v5, i32 undef)
+  %v7 = add nsw i32 %v3, -16
+  %v8 = tail call i64 @llvm.hexagon.M2.vdmacs.s0(i64 %v1, i64 undef, i64 %v6)
+  %v9 = add nsw i32 %v2, 1
+  %v10 = icmp eq i32 %v9, %v0
+  br i1 %v10, label %b2, label %b1
+
+b2:                                               ; preds = %b1
+  %v11 = trunc i64 %v8 to i32
+  %v12 = getelementptr inbounds i32, i32* %a1, i32 8
+  store i32 %v11, i32* %v12, align 4, !tbaa !0
+  call void @llvm.trap()
+  unreachable
+}
+
+; Function Attrs: nounwind readnone
+declare i64 @llvm.hexagon.M2.vdmacs.s0(i64, i64, i64) #1
+
+; Function Attrs: nounwind readnone
+declare i64 @llvm.hexagon.S2.packhl(i32, i32) #1
+
+; Function Attrs: noreturn nounwind
+declare void @llvm.trap() #2
+
+attributes #0 = { nounwind "target-cpu"="hexagonv55" }
+attributes #1 = { nounwind readnone }
+attributes #2 = { noreturn nounwind }
+
+!0 = !{!1, !1, i64 0}
+!1 = !{!"int", !2, i64 0}
+!2 = !{!"omnipotent char", !3, i64 0}
+!3 = !{!"Simple C/C++ TBAA"}