[llvm] r295721 - [X86][SSE] Added SSE41 shuffle combining test file.

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Tue Feb 21 08:51:15 2017
New Revision: 295721

URL: http://llvm.org/viewvc/llvm-project?rev=295721&view=rev
Log:
[X86][SSE] Added SSE41 shuffle combining test file.

Currently just contains one case where we combine to VZEXT_MOVL instead of VZEXT which would avoid the need for a zero vector to be generated

Added:
    llvm/trunk/test/CodeGen/X86/vector-shuffle-combining-sse41.ll

Added: llvm/trunk/test/CodeGen/X86/vector-shuffle-combining-sse41.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/vector-shuffle-combining-sse41.ll?rev=295721&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/X86/vector-shuffle-combining-sse41.ll (added)
+++ llvm/trunk/test/CodeGen/X86/vector-shuffle-combining-sse41.ll Tue Feb 21 08:51:15 2017
@@ -0,0 +1,38 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+sse4.1 | FileCheck %s --check-prefix=ALL --check-prefix=SSE --check-prefix=SSE41
+; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+avx | FileCheck %s --check-prefix=ALL --check-prefix=AVX --check-prefix=AVX1
+; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+avx2 | FileCheck %s --check-prefix=ALL --check-prefix=AVX --check-prefix=AVX2
+; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+avx512f | FileCheck %s --check-prefix=ALL --check-prefix=AVX --check-prefix=AVX512F
+;
+; Combine tests involving SSE41 target shuffles (BLEND,INSERTPS,MOVZX)
+
+declare <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8>, <16 x i8>)
+
+; FIXME: We can avoid the zero vector generation if we use PMOVZX instead
+define <16 x i8> @combine_vpshufb_as_movzx(<16 x i8> %a0) {
+; SSE-LABEL: combine_vpshufb_as_movzx:
+; SSE:       # BB#0:
+; SSE-NEXT:    pxor %xmm1, %xmm1
+; SSE-NEXT:    pblendw {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3,4,5,6,7]
+; SSE-NEXT:    retq
+;
+; AVX1-LABEL: combine_vpshufb_as_movzx:
+; AVX1:       # BB#0:
+; AVX1-NEXT:    vpxor %xmm1, %xmm1, %xmm1
+; AVX1-NEXT:    vpblendw {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3,4,5,6,7]
+; AVX1-NEXT:    retq
+;
+; AVX2-LABEL: combine_vpshufb_as_movzx:
+; AVX2:       # BB#0:
+; AVX2-NEXT:    vpxor %xmm1, %xmm1, %xmm1
+; AVX2-NEXT:    vpblendw {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3,4,5,6,7]
+; AVX2-NEXT:    retq
+;
+; AVX512F-LABEL: combine_vpshufb_as_movzx:
+; AVX512F:       # BB#0:
+; AVX512F-NEXT:    vxorps %xmm1, %xmm1, %xmm1
+; AVX512F-NEXT:    vmovss {{.*#+}} xmm0 = xmm0[0],xmm1[1,2,3]
+; AVX512F-NEXT:    retq
+  %res0 = call <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8> %a0, <16 x i8> <i8 0, i8 1, i8 2, i8 3, i8 -1, i8 -1, i8 -1, i8 -1, i8 undef, i8 undef, i8 undef, i8 undef, i8 -1, i8 -1, i8 -1, i8 -1>)
+  ret <16 x i8> %res0
+}