| ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+sse4.1 | FileCheck %s |
| |
| define void @foo(<3 x float> %in, <4 x i8>* nocapture %out) nounwind { |
| ; CHECK-LABEL: foo: |
| ; CHECK: # BB#0: |
| ; CHECK-NEXT: cvttps2dq %xmm0, %xmm0 |
| ; CHECK-NEXT: movl $255, %eax |
| ; CHECK-NEXT: pinsrd $3, %eax, %xmm0 |
| ; CHECK-NEXT: pshufb {{.*#+}} xmm0 = xmm0[0,4,8,12,u,u,u,u,u,u,u,u,u,u,u,u] |
| ; CHECK-NEXT: movd %xmm0, (%rdi) |
| ; CHECK-NEXT: retq |
| %t0 = fptoui <3 x float> %in to <3 x i8> |
| %t1 = shufflevector <3 x i8> %t0, <3 x i8> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 undef> |
| %t2 = insertelement <4 x i8> %t1, i8 -1, i32 3 |
| store <4 x i8> %t2, <4 x i8>* %out, align 4 |
| ret void |
| } |
| |
| ; Verify that the DAGCombiner doesn't wrongly fold a build_vector into a |
| ; blend with a zero vector if the build_vector contains negative zero. |
| ; |
| ; TODO: the codegen for function 'test_negative_zero_1' is sub-optimal. |
| ; Ideally, we should generate a single shuffle blend operation. |
| |
| define <4 x float> @test_negative_zero_1(<4 x float> %A) { |
| ; CHECK-LABEL: test_negative_zero_1: |
| ; CHECK: # BB#0: # %entry |
| ; CHECK-NEXT: movapd %xmm0, %xmm1 |
| ; CHECK-NEXT: shufpd {{.*#+}} xmm1 = xmm1[1,0] |
| ; CHECK-NEXT: xorps %xmm2, %xmm2 |
| ; CHECK-NEXT: blendps {{.*#+}} xmm2 = xmm1[0],xmm2[1,2,3] |
| ; CHECK-NEXT: movss {{.*#+}} xmm1 = mem[0],zero,zero,zero |
| ; CHECK-NEXT: unpcklps {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1] |
| ; CHECK-NEXT: unpcklpd {{.*#+}} xmm0 = xmm0[0],xmm2[0] |
| ; CHECK-NEXT: retq |
| entry: |
| %0 = extractelement <4 x float> %A, i32 0 |
| %1 = insertelement <4 x float> undef, float %0, i32 0 |
| %2 = insertelement <4 x float> %1, float -0.0, i32 1 |
| %3 = extractelement <4 x float> %A, i32 2 |
| %4 = insertelement <4 x float> %2, float %3, i32 2 |
| %5 = insertelement <4 x float> %4, float 0.0, i32 3 |
| ret <4 x float> %5 |
| } |
| |
| define <2 x double> @test_negative_zero_2(<2 x double> %A) { |
| ; CHECK-LABEL: test_negative_zero_2: |
| ; CHECK: # BB#0: # %entry |
| ; CHECK-NEXT: movhpd {{.*}}(%rip), %xmm0 |
| ; CHECK-NEXT: retq |
| entry: |
| %0 = extractelement <2 x double> %A, i32 0 |
| %1 = insertelement <2 x double> undef, double %0, i32 0 |
| %2 = insertelement <2 x double> %1, double -0.0, i32 1 |
| ret <2 x double> %2 |
| } |