[X86][SSSE3] Added target shuffle combine tests for SSE3/SSSE3 specific shuffles.

Allows us to test SSSE3 PSHUFB intrinsic.

llvm-svn: 261753

diff --git a/llvm/test/CodeGen/X86/vector-shuffle-combining-ssse3.ll b/llvm/test/CodeGen/X86/vector-shuffle-combining-ssse3.ll
new file mode 100644 (file)
index 0000000..fc8bdd0
--- /dev/null
+++ b/llvm/test/CodeGen/X86/vector-shuffle-combining-ssse3.ll
@@ -0,0 +1,67 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+ssse3 | FileCheck %s --check-prefix=ALL --check-prefix=SSE --check-prefix=SSSE3
+; 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 SSE3/SSSE3 target shuffles (MOVDDUP, MOVSHDUP, MOVSLDUP, PSHUFB)
+
+declare <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8>, <16 x i8>)
+
+define <4 x float> @combine_pshufb_movddup(<4 x float> %a0) {
+; SSE-LABEL: combine_pshufb_movddup:
+; SSE:       # BB#0:
+; SSE-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[5,5,5,5,7,7,7,7,1,1,1,1,3,3,3,3]
+; SSE-NEXT:    movddup {{.*#+}} xmm0 = xmm0[0,0]
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: combine_pshufb_movddup:
+; AVX:       # BB#0:
+; AVX-NEXT:    vpshufb {{.*#+}} xmm0 = xmm0[5,5,5,5,7,7,7,7,1,1,1,1,3,3,3,3]
+; AVX-NEXT:    vmovddup {{.*#+}} xmm0 = xmm0[0,0]
+; AVX-NEXT:    retq
+  %1 = bitcast <4 x float> %a0 to <16 x i8>
+  %2 = tail call <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8> %1, <16 x i8> <i8 5, i8 5, i8 5, i8 5, i8 7, i8 7, i8 7, i8 7, i8 1, i8 1, i8 1, i8 1, i8 3, i8 3, i8 3, i8 3>)
+  %3 = bitcast <16 x i8> %2 to <4 x float>
+  %4 = shufflevector <4 x float> %3, <4 x float> undef, <4 x i32> <i32 0, i32 1, i32 0, i32 1>
+  ret <4 x float> %4
+}
+
+define <4 x float> @combine_pshufb_movshdup(<4 x float> %a0) {
+; SSE-LABEL: combine_pshufb_movshdup:
+; SSE:       # BB#0:
+; SSE-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[5,5,5,5,7,7,7,7,1,1,1,1,3,3,3,3]
+; SSE-NEXT:    movshdup {{.*#+}} xmm0 = xmm0[1,1,3,3]
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: combine_pshufb_movshdup:
+; AVX:       # BB#0:
+; AVX-NEXT:    vpshufb {{.*#+}} xmm0 = xmm0[5,5,5,5,7,7,7,7,1,1,1,1,3,3,3,3]
+; AVX-NEXT:    vmovshdup {{.*#+}} xmm0 = xmm0[1,1,3,3]
+; AVX-NEXT:    retq
+  %1 = bitcast <4 x float> %a0 to <16 x i8>
+  %2 = tail call <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8> %1, <16 x i8> <i8 5, i8 5, i8 5, i8 5, i8 7, i8 7, i8 7, i8 7, i8 1, i8 1, i8 1, i8 1, i8 3, i8 3, i8 3, i8 3>)
+  %3 = bitcast <16 x i8> %2 to <4 x float>
+  %4 = shufflevector <4 x float> %3, <4 x float> undef, <4 x i32> <i32 1, i32 1, i32 3, i32 3>
+  ret <4 x float> %4
+}
+
+define <4 x float> @combine_pshufb_movsldup(<4 x float> %a0) {
+; SSE-LABEL: combine_pshufb_movsldup:
+; SSE:       # BB#0:
+; SSE-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[5,5,5,5,7,7,7,7,1,1,1,1,3,3,3,3]
+; SSE-NEXT:    movsldup {{.*#+}} xmm0 = xmm0[0,0,2,2]
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: combine_pshufb_movsldup:
+; AVX:       # BB#0:
+; AVX-NEXT:    vpshufb {{.*#+}} xmm0 = xmm0[5,5,5,5,7,7,7,7,1,1,1,1,3,3,3,3]
+; AVX-NEXT:    vmovsldup {{.*#+}} xmm0 = xmm0[0,0,2,2]
+; AVX-NEXT:    retq
+  %1 = bitcast <4 x float> %a0 to <16 x i8>
+  %2 = tail call <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8> %1, <16 x i8> <i8 5, i8 5, i8 5, i8 5, i8 7, i8 7, i8 7, i8 7, i8 1, i8 1, i8 1, i8 1, i8 3, i8 3, i8 3, i8 3>)
+  %3 = bitcast <16 x i8> %2 to <4 x float>
+  %4 = shufflevector <4 x float> %3, <4 x float> undef, <4 x i32> <i32 0, i32 0, i32 2, i32 2>
+  ret <4 x float> %4
+}