[llvm] r273097 - [X86][SSSE3] Added examples of target shuffle combining failing to match undefs in shuffle masks

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Sat Jun 18 16:18:21 2016
New Revision: 273097

URL: http://llvm.org/viewvc/llvm-project?rev=273097&view=rev
Log:
[X86][SSSE3] Added examples of target shuffle combining failing to match undefs in shuffle masks

Modified:
    llvm/trunk/test/CodeGen/X86/vector-shuffle-combining-ssse3.ll

Modified: llvm/trunk/test/CodeGen/X86/vector-shuffle-combining-ssse3.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/vector-shuffle-combining-ssse3.ll?rev=273097&r1=273096&r2=273097&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/vector-shuffle-combining-ssse3.ll (original)
+++ llvm/trunk/test/CodeGen/X86/vector-shuffle-combining-ssse3.ll Sat Jun 18 16:18:21 2016
@@ -137,6 +137,34 @@ define <16 x i8> @combine_pshufb_psrldq(
   ret <16 x i8> %2
 }
 
+define <16 x i8> @combine_pshufb_as_unary_unpcklbw(<16 x i8> %a0) {
+; SSE-LABEL: combine_pshufb_as_unary_unpcklbw:
+; SSE:       # BB#0:
+; SSE-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[0,u,u,1,2,2,3,3,4,4,5,5,6,6,7,7]
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: combine_pshufb_as_unary_unpcklbw:
+; AVX:       # BB#0:
+; AVX-NEXT:    vpshufb {{.*#+}} xmm0 = xmm0[0,u,u,1,2,2,3,3,4,4,5,5,6,6,7,7]
+; AVX-NEXT:    retq
+  %1 = tail call <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8> %a0, <16 x i8> <i8 0, i8 undef, i8 undef, i8 1, i8 2, i8 2, i8 3, i8 3, i8 4, i8 4, i8 5, i8 5, i8 6, i8 6, i8 7, i8 7>)
+  ret <16 x i8> %1
+}
+
+define <16 x i8> @combine_pshufb_as_unary_unpckhwd(<16 x i8> %a0) {
+; SSE-LABEL: combine_pshufb_as_unary_unpckhwd:
+; SSE:       # BB#0:
+; SSE-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[8,9,8,9,10,11,10,11,12,13,12,13,14,15,u,u]
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: combine_pshufb_as_unary_unpckhwd:
+; AVX:       # BB#0:
+; AVX-NEXT:    vpshufb {{.*#+}} xmm0 = xmm0[8,9,8,9,10,11,10,11,12,13,12,13,14,15,u,u]
+; AVX-NEXT:    retq
+  %1 = tail call <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8> %a0, <16 x i8> <i8 8, i8 9, i8 8, i8 9, i8 10, i8 11, i8 10, i8 11, i8 12, i8 13, i8 12, i8 13, i8 14, i8 15, i8 undef, i8 undef>)
+  ret <16 x i8> %1
+}
+
 define <16 x i8> @combine_unpckl_arg0_pshufb(<16 x i8> %a0, <16 x i8> %a1) {
 ; SSE-LABEL: combine_unpckl_arg0_pshufb:
 ; SSE:       # BB#0: