1 files changed, 49 insertions, 0 deletions
diff --git a/test/CodeGen/X86/vector-shuffle-combining.ll b/test/CodeGen/X86/vector-shuffle-combining.ll
new file mode 100644
index 0000000000..dae1ef5875
--- /dev/null
+++ b/test/CodeGen/X86/vector-shuffle-combining.ll
@@ -0,0 +1,49 @@
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=x86-64 -x86-experimental-vector-shuffle-lowering | FileCheck %s --check-prefix=CHECK-SSE2
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-unknown"
+
+declare <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16>, i8)
+declare <8 x i16> @llvm.x86.sse2.pshufh.w(<8 x i16>, i8)
+
+define <8 x i16> @combine_pshuflw1(<8 x i16> %a) {
+; CHECK-SSE2-LABEL: @combine_pshuflw1
+; CHECK-SSE2:       # BB#0:
+; CHECK-SSE2-NEXT:    retq
+  %b = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %a, i8 27) 
+  %c = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %b, i8 27) 
+  ret <8 x i16> %c
+}
+
+define <8 x i16> @combine_pshuflw2(<8 x i16> %a) {
+; CHECK-SSE2-LABEL: @combine_pshuflw2
+; CHECK-SSE2:       # BB#0:
+; CHECK-SSE2-NEXT:    retq
+  %b = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %a, i8 27)
+  %c = call <8 x i16> @llvm.x86.sse2.pshufh.w(<8 x i16> %b, i8 -28) 
+  %d = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %c, i8 27) 
+  ret <8 x i16> %d
+}
+
+define <8 x i16> @combine_pshuflw3(<8 x i16> %a) {
+; CHECK-SSE2-LABEL: @combine_pshuflw3
+; CHECK-SSE2:       # BB#0:
+; CHECK-SSE2-NEXT:    pshufhw {{.*}} # xmm0 = xmm0[0,1,2,3,7,6,5,4]
+; CHECK-SSE2-NEXT:    retq
+  %b = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %a, i8 27)
+  %c = call <8 x i16> @llvm.x86.sse2.pshufh.w(<8 x i16> %b, i8 27) 
+  %d = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %c, i8 27) 
+  ret <8 x i16> %d
+}
+
+define <8 x i16> @combine_pshufhw1(<8 x i16> %a) {
+; CHECK-SSE2-LABEL: @combine_pshufhw1
+; CHECK-SSE2:       # BB#0:
+; CHECK-SSE2-NEXT:    pshuflw {{.*}} # xmm0 = xmm0[3,2,1,0,4,5,6,7]
+; CHECK-SSE2-NEXT:    retq
+  %b = call <8 x i16> @llvm.x86.sse2.pshufh.w(<8 x i16> %a, i8 27)
+  %c = call <8 x i16> @llvm.x86.sse2.pshufl.w(<8 x i16> %b, i8 27) 
+  %d = call <8 x i16> @llvm.x86.sse2.pshufh.w(<8 x i16> %c, i8 27) 
+  ret <8 x i16> %d
+}
+