1 files changed, 30 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/Hexagon/hvx-loopidiom-memcpy.ll b/llvm/test/CodeGen/Hexagon/hvx-loopidiom-memcpy.ll
new file mode 100644
index 00000000000..22c2400f4c4
--- /dev/null
+++ b/llvm/test/CodeGen/Hexagon/hvx-loopidiom-memcpy.ll
@@ -0,0 +1,30 @@
+; RUN: opt -march=hexagon -hexagon-loop-idiom -S < %s | FileCheck %s
+
+; Make sure we don't convert load/store loops into memcpy if the access type
+; is a vector. Using vector instructions is generally better in such cases.
+
+; CHECK-NOT: @llvm.memcpy
+
+%s.0 = type { i32 }
+
+define void @f0(%s.0* noalias %a0, %s.0* noalias %a1) #0 align 2 {
+b0:
+  br i1 undef, label %b1, label %b2
+
+b1:                                               ; preds = %b1, %b0
+  %v0 = phi i32 [ %v7, %b1 ], [ 0, %b0 ]
+  %v1 = mul nuw nsw i32 %v0, 64
+  %v2 = getelementptr %s.0, %s.0* %a0, i32 %v1
+  %v3 = getelementptr %s.0, %s.0* %a1, i32 %v1
+  %v4 = bitcast %s.0* %v2 to <64 x i32>*
+  %v5 = load <64 x i32>, <64 x i32>* %v4, align 256
+  %v6 = bitcast %s.0* %v3 to <64 x i32>*
+  store <64 x i32> %v5, <64 x i32>* %v6, align 256
+  %v7 = add nuw nsw i32 %v0, 1
+  br i1 undef, label %b1, label %b2
+
+b2:                                               ; preds = %b1, %b0
+  ret void
+}
+
+attributes #0 = { "target-cpu"="hexagonv60" "target-features"="+hvx,+hvx-length64b" }