1; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+sse4.1 | FileCheck %s
2
3define void @foo(<3 x float> %in, <4 x i8>* nocapture %out) nounwind {
4; CHECK-LABEL: foo:
5; CHECK:       # BB#0:
6; CHECK-NEXT:    cvttps2dq %xmm0, %xmm0
7; CHECK-NEXT:    movl $255, %eax
8; CHECK-NEXT:    pinsrd $3, %eax, %xmm0
9; CHECK-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[0,4,8,12,u,u,u,u,u,u,u,u,u,u,u,u]
10; CHECK-NEXT:    movd %xmm0, (%rdi)
11; CHECK-NEXT:    retq
12  %t0 = fptoui <3 x float> %in to <3 x i8>
13  %t1 = shufflevector <3 x i8> %t0, <3 x i8> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 undef>
14  %t2 = insertelement <4 x i8> %t1, i8 -1, i32 3
15  store <4 x i8> %t2, <4 x i8>* %out, align 4
16  ret void
17}
18
19; Verify that the DAGCombiner doesn't wrongly fold a build_vector into a
20; blend with a zero vector if the build_vector contains negative zero.
21;
22; TODO: the codegen for function 'test_negative_zero_1' is sub-optimal.
23; Ideally, we should generate a single shuffle blend operation.
24
25define <4 x float> @test_negative_zero_1(<4 x float> %A) {
26; CHECK-LABEL: test_negative_zero_1:
27; CHECK:       # BB#0: # %entry
28; CHECK-NEXT:    movapd %xmm0, %xmm1
29; CHECK-NEXT:    shufpd {{.*#+}} xmm1 = xmm1[1,0]
30; CHECK-NEXT:    xorps %xmm2, %xmm2
31; CHECK-NEXT:    blendps {{.*#+}} xmm2 = xmm1[0],xmm2[1,2,3]
32; CHECK-NEXT:    movss {{.*#+}} xmm1 = mem[0],zero,zero,zero
33; CHECK-NEXT:    unpcklps {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
34; CHECK-NEXT:    unpcklpd {{.*#+}} xmm0 = xmm0[0],xmm2[0]
35; CHECK-NEXT:    retq
36entry:
37  %0 = extractelement <4 x float> %A, i32 0
38  %1 = insertelement <4 x float> undef, float %0, i32 0
39  %2 = insertelement <4 x float> %1, float -0.0, i32 1
40  %3 = extractelement <4 x float> %A, i32 2
41  %4 = insertelement <4 x float> %2, float %3, i32 2
42  %5 = insertelement <4 x float> %4, float 0.0, i32 3
43  ret <4 x float> %5
44}
45
46define <2 x double> @test_negative_zero_2(<2 x double> %A) {
47; CHECK-LABEL: test_negative_zero_2:
48; CHECK:       # BB#0: # %entry
49; CHECK-NEXT:    movhpd {{.*}}(%rip), %xmm0
50; CHECK-NEXT:    retq
51entry:
52  %0 = extractelement <2 x double> %A, i32 0
53  %1 = insertelement <2 x double> undef, double %0, i32 0
54  %2 = insertelement <2 x double> %1, double -0.0, i32 1
55  ret <2 x double> %2
56}
57