[X86][SSE] Add extra v16i16 shl x,c -> pmullw test

We want to compare shifts with repeated vs non-repeated v8i16 shuffle masks (for PBLENDW ymm) 

llvm-svn: 336333

1 files changed, 27 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/X86/lower-vec-shift.ll b/llvm/test/CodeGen/X86/lower-vec-shift.ll
index 13953b914d0..0b573d7a8b8 100644
--- a/llvm/test/CodeGen/X86/lower-vec-shift.ll
+++ b/llvm/test/CodeGen/X86/lower-vec-shift.ll
@@ -255,6 +255,8 @@ define <8 x i32> @test10(<8 x i32>* %a) {
   ret <8 x i32> %ashr
 }
 
+; test11 vs test12 - show difference between v16i16 that is repeated/non-repeated at v8i16 level (for PBLENDW masks).
+
 define <16 x i16> @test11(<16 x i16> %a) {
 ; SSE-LABEL: test11:
 ; SSE:       # %bb.0:
@@ -277,3 +279,28 @@ define <16 x i16> @test11(<16 x i16> %a) {
   %lshr = shl <16 x i16> %a, <i16 1, i16 3, i16 1, i16 1, i16 1, i16 3, i16 3, i16 3, i16 3, i16 3, i16 3, i16 1, i16 1, i16 1, i16 3, i16 1>
   ret <16 x i16> %lshr
 }
+
+define <16 x i16> @test12(<16 x i16> %a) {
+; SSE-LABEL: test12:
+; SSE:       # %bb.0:
+; SSE-NEXT:    movdqa {{.*#+}} xmm2 = [2,8,2,2,2,8,8,8]
+; SSE-NEXT:    pmullw %xmm2, %xmm0
+; SSE-NEXT:    pmullw %xmm2, %xmm1
+; SSE-NEXT:    retq
+;
+; AVX1-LABEL: test12:
+; AVX1:       # %bb.0:
+; AVX1-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX1-NEXT:    vmovdqa {{.*#+}} xmm2 = [2,8,2,2,2,8,8,8]
+; AVX1-NEXT:    vpmullw %xmm2, %xmm1, %xmm1
+; AVX1-NEXT:    vpmullw %xmm2, %xmm0, %xmm0
+; AVX1-NEXT:    vinsertf128 $1, %xmm1, %ymm0, %ymm0
+; AVX1-NEXT:    retq
+;
+; AVX2-LABEL: test12:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vpmullw {{.*}}(%rip), %ymm0, %ymm0
+; AVX2-NEXT:    retq
+  %lshr = shl <16 x i16> %a, <i16 1, i16 3, i16 1, i16 1, i16 1, i16 3, i16 3, i16 3, i16 1, i16 3, i16 1, i16 1, i16 1, i16 3, i16 3, i16 3>
+  ret <16 x i16> %lshr
+}