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e5f972f1c1
This patch builds on http://reviews.llvm.org/D5598 to perform byte rotation shuffles (lowerVectorShuffleAsByteRotate) on pre-SSSE3 (palignr) targets - pre-SSSE3 is only enabled on i8 and i16 vector targets where it is a more definite performance gain. I've also added a separate byte shift shuffle (lowerVectorShuffleAsByteShift) that makes use of the ability of the SLLDQ/SRLDQ instructions to implicitly shift in zero bytes to avoid the need to create a zero register if we had used palignr. Differential Revision: http://reviews.llvm.org/D5699 llvm-svn: 222340
89 lines
3.5 KiB
LLVM
89 lines
3.5 KiB
LLVM
; RUN: llc < %s -march=x86 -mattr=+sse2,+ssse3 | FileCheck %s
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; There are no MMX operations in @t1
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define void @t1(i32 %a, x86_mmx* %P) nounwind {
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; CHECK-LABEL: t1:
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; CHECK: # BB#0:
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; CHECK-NEXT: shll $12, %ecx
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; CHECK-NEXT: movd %ecx, %xmm0
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; CHECK-NEXT: pshufd {{.*#+}} xmm0 = xmm0[1,0,0,1]
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; CHECK-NEXT: movlpd %xmm0, (%eax)
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; CHECK-NEXT: retl
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%tmp12 = shl i32 %a, 12
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%tmp21 = insertelement <2 x i32> undef, i32 %tmp12, i32 1
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%tmp22 = insertelement <2 x i32> %tmp21, i32 0, i32 0
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%tmp23 = bitcast <2 x i32> %tmp22 to x86_mmx
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store x86_mmx %tmp23, x86_mmx* %P
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ret void
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}
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define <4 x float> @t2(<4 x float>* %P) nounwind {
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; CHECK-LABEL: t2:
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; CHECK: # BB#0:
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: movaps (%eax), %xmm1
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; CHECK-NEXT: xorps %xmm0, %xmm0
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; CHECK-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,0],xmm0[0,0]
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; CHECK-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,0],xmm1[2,0]
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; CHECK-NEXT: retl
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%tmp1 = load <4 x float>* %P
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%tmp2 = shufflevector <4 x float> %tmp1, <4 x float> zeroinitializer, <4 x i32> < i32 4, i32 4, i32 4, i32 0 >
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ret <4 x float> %tmp2
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}
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define <4 x float> @t3(<4 x float>* %P) nounwind {
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; CHECK-LABEL: t3:
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; CHECK: # BB#0:
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: movaps (%eax), %xmm0
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; CHECK-NEXT: xorps %xmm1, %xmm1
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; CHECK-NEXT: shufps {{.*#+}} xmm0 = xmm0[2,3],xmm1[0,0]
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; CHECK-NEXT: retl
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%tmp1 = load <4 x float>* %P
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%tmp2 = shufflevector <4 x float> %tmp1, <4 x float> zeroinitializer, <4 x i32> < i32 2, i32 3, i32 4, i32 4 >
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ret <4 x float> %tmp2
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}
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define <4 x float> @t4(<4 x float>* %P) nounwind {
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; CHECK-LABEL: t4:
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; CHECK: # BB#0:
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: movaps (%eax), %xmm0
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; CHECK-NEXT: xorps %xmm1, %xmm1
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; CHECK-NEXT: shufps {{.*#+}} xmm0 = xmm0[3,0],xmm1[0,0]
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; CHECK-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,2],xmm1[0,0]
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; CHECK-NEXT: retl
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%tmp1 = load <4 x float>* %P
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%tmp2 = shufflevector <4 x float> zeroinitializer, <4 x float> %tmp1, <4 x i32> < i32 7, i32 0, i32 0, i32 0 >
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ret <4 x float> %tmp2
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}
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define <16 x i8> @t5(<16 x i8> %x) nounwind {
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; CHECK-LABEL: t5:
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; CHECK: # BB#0:
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; CHECK-NEXT: psrldq {{.*#+}} xmm0 = xmm0[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15],zero
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; CHECK-NEXT: retl
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%s = shufflevector <16 x i8> %x, <16 x i8> zeroinitializer, <16 x i32> <i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 17>
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ret <16 x i8> %s
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}
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define <16 x i8> @t6(<16 x i8> %x) nounwind {
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; CHECK-LABEL: t6:
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; CHECK: # BB#0:
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; CHECK-NEXT: psrldq {{.*#+}} xmm0 = xmm0[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15],zero
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; CHECK-NEXT: retl
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%s = shufflevector <16 x i8> %x, <16 x i8> undef, <16 x i32> <i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
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ret <16 x i8> %s
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}
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define <16 x i8> @t7(<16 x i8> %x) nounwind {
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; CHECK-LABEL: t7:
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; CHECK: # BB#0:
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; CHECK-NEXT: pslldq {{.*#+}} xmm0 = zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,xmm0[0,1,2]
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; CHECK-NEXT: retl
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%s = shufflevector <16 x i8> %x, <16 x i8> undef, <16 x i32> <i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 1, i32 2>
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ret <16 x i8> %s
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}
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