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82d9e3d26c
There are some VectorShuffle Nodes in SDAG which can be selected to XXSLDWI instruction, this patch recognizes them and does the selection to improve the PPC performance. llvm-svn: 303822
20 lines
641 B
LLVM
20 lines
641 B
LLVM
; RUN: llc -verify-machineinstrs -mtriple=powerpc64-linux-gnu -mcpu=pwr8 -mattr=+vsx < %s | FileCheck %s
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define <4 x float> @bar(float* %p, float* %q) {
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%1 = bitcast float* %p to <12 x float>*
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%2 = bitcast float* %q to <12 x float>*
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%3 = load <12 x float>, <12 x float>* %1, align 16
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%4 = load <12 x float>, <12 x float>* %2, align 16
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%5 = fsub <12 x float> %4, %3
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%6 = shufflevector <12 x float> %5, <12 x float> undef, <4 x i32> <i32 0, i32 3, i32 6, i32 9>
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ret <4 x float> %6
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; CHECK: xxsldwi
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; CHECK-NEXT: vmrghw
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; CHECK-NEXT: vmrglw
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; CHECK-NEXT: xxsldwi
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; CHECK-NEXT: xxsldwi
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; CHECK-NEXT: xxsldwi
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; CHECK-NEXT: blr
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}
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