diff options
| -rw-r--r-- | llvm/test/CodeGen/X86/vector-shuffle-combining.ll | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/vector-shuffle-combining.ll b/llvm/test/CodeGen/X86/vector-shuffle-combining.ll index d11bae614e9..b8f572f0c8d 100644 --- a/llvm/test/CodeGen/X86/vector-shuffle-combining.ll +++ b/llvm/test/CodeGen/X86/vector-shuffle-combining.ll @@ -2823,3 +2823,25 @@ define <4 x float> @PR30264(<4 x float> %x) { %shuf2 = shufflevector <4 x float> %shuf1, <4 x float> <float undef, float undef, float 4.0, float 1.0>, <4 x i32> <i32 0, i32 1, i32 6, i32 7> ret <4 x float> %shuf2 } + +define <8 x i16> @PR39549(<16 x i8> %x) { +; SSE-LABEL: PR39549: +; SSE: # %bb.0: +; SSE-NEXT: pxor %xmm1, %xmm1 +; SSE-NEXT: punpckhbw {{.*#+}} xmm1 = xmm1[8],xmm0[8],xmm1[9],xmm0[9],xmm1[10],xmm0[10],xmm1[11],xmm0[11],xmm1[12],xmm0[12],xmm1[13],xmm0[13],xmm1[14],xmm0[14],xmm1[15],xmm0[15] +; SSE-NEXT: psraw $8, %xmm1 +; SSE-NEXT: movdqa %xmm1, %xmm0 +; SSE-NEXT: retq +; +; AVX-LABEL: PR39549: +; AVX: # %bb.0: +; AVX-NEXT: vpxor %xmm1, %xmm1, %xmm1 +; AVX-NEXT: vpunpckhbw {{.*#+}} xmm0 = xmm1[8],xmm0[8],xmm1[9],xmm0[9],xmm1[10],xmm0[10],xmm1[11],xmm0[11],xmm1[12],xmm0[12],xmm1[13],xmm0[13],xmm1[14],xmm0[14],xmm1[15],xmm0[15] +; AVX-NEXT: vpsraw $8, %xmm0, %xmm0 +; AVX-NEXT: retq + %a = shufflevector <16 x i8> %x, <16 x i8> undef, <16 x i32> <i32 8, i32 undef, i32 9, i32 undef, i32 10, i32 undef, i32 11, i32 undef, i32 12, i32 undef, i32 13, i32 undef, i32 14, i32 undef, i32 15, i32 undef> + %b = bitcast <16 x i8> %a to <8 x i16> + %c = shl <8 x i16> %b, <i16 8, i16 8, i16 8, i16 8, i16 8, i16 8, i16 8, i16 8> + %d = ashr <8 x i16> %c, <i16 8, i16 8, i16 8, i16 8, i16 8, i16 8, i16 8, i16 8> + ret <8 x i16> %d +} |
