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https://github.com/c64scene-ar/llvm-6502.git
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91ea3e41ae
perform a load to use blendps rather than movss when it is available. For non-loads, blendps is *much* faster. It can execute on two ports in Sandy Bridge and Ivy Bridge, and *three* ports on Haswell. This fixes one of the "regressions" from aggressively taking the "insertion" path in the new vector shuffle lowering. This does highlight one problem with blendps -- it isn't commuted as heavily as it should be. That's future work though. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219022 91177308-0d34-0410-b5e6-96231b3b80d8
55 lines
1.8 KiB
LLVM
55 lines
1.8 KiB
LLVM
; RUN: llc < %s -march=x86 -mattr=+sse2 -mcpu=penryn | FileCheck %s
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; RUN: llc < %s -march=x86 -mattr=+sse2 -mcpu=penryn -x86-experimental-vector-shuffle-lowering | FileCheck %s --check-prefix=CHECK-EXP
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define <4 x float> @test(float %a) {
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; CHECK-LABEL: test:
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; CHECK: movss {{.*}}, %xmm0
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; CHECK-NEXT: pshufd {{.*#+}} xmm0 = xmm0[1,0,1,1]
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; CHECK-NEXT: retl
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;
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; CHECK-EXP-LABEL: test:
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; CHECK-EXP: insertps $29, {{.*}}, %xmm0
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; CHECK-EXP-NEXT: retl
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entry:
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%tmp = insertelement <4 x float> zeroinitializer, float %a, i32 1
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%tmp5 = insertelement <4 x float> %tmp, float 0.000000e+00, i32 2
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%tmp6 = insertelement <4 x float> %tmp5, float 0.000000e+00, i32 3
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ret <4 x float> %tmp6
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}
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define <2 x i64> @test2(i32 %a) {
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; CHECK-LABEL: test2:
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; CHECK: movd {{.*}}, %xmm0
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; CHECK-NEXT: pshufd {{.*#+}} xmm0 = xmm0[1,1,0,1]
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; CHECK-NEXT: retl
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;
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; CHECK-EXP-LABEL: test2:
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; CHECK-EXP: movd {{.*}}, %xmm0
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; CHECK-EXP-NEXT: pshufd {{.*#+}} xmm0 = xmm0[1,1,0,1]
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; CHECK-EXP-NEXT: retl
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entry:
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%tmp7 = insertelement <4 x i32> zeroinitializer, i32 %a, i32 2
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%tmp9 = insertelement <4 x i32> %tmp7, i32 0, i32 3
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%tmp10 = bitcast <4 x i32> %tmp9 to <2 x i64>
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ret <2 x i64> %tmp10
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}
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define <4 x float> @test3(<4 x float> %A) {
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; CHECK-LABEL: test3:
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; CHECK: xorps %[[X1:xmm[0-9]+]], %[[X1]]
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; CHECK-NEXT: blendps $1, %xmm0, %[[X1]]
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; CHECK-NEXT: pshufd {{.*#+}} xmm0 = [[X1]][1,0,1,1]
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; CHECK-NEXT: retl
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;
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; CHECK-EXP-LABEL: test3:
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; CHECK-EXP: insertps {{.*#+}} xmm0 = zero,xmm0[0],zero,zero
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; CHECK-EXP-NEXT: retl
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%tmp0 = extractelement <4 x float> %A, i32 0
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%tmp1 = insertelement <4 x float> <float 0.000000e+00, float undef, float undef, float undef >, float %tmp0, i32 1
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%tmp2 = insertelement <4 x float> %tmp1, float 0.000000e+00, i32 2
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ret <4 x float> %tmp2
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}
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