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- If INSERT_VECTOR_ELT is supported (above SSE2, either by custom sequence of legal insn), transform BUILD_VECTOR into SHUFFLE + INSERT_VECTOR_ELT if most of elements could be built from SHUFFLE with few (so far 1) elements being inserted. llvm-svn: 166288
16 lines
498 B
LLVM
16 lines
498 B
LLVM
; RUN: llc < %s -mcpu=corei7 -mtriple=x86_64-unknown-linux-gnu | FileCheck %s
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define void @foo(<3 x float> %in, <4 x i8>* nocapture %out) nounwind {
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%t0 = fptoui <3 x float> %in to <3 x i8>
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%t1 = shufflevector <3 x i8> %t0, <3 x i8> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 undef>
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%t2 = insertelement <4 x i8> %t1, i8 -1, i32 3
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store <4 x i8> %t2, <4 x i8>* %out, align 4
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ret void
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; CHECK: foo
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; CHECK: cvttps2dq
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; CHECK-NOT: pextrd
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; CHECK: pinsrd
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; CHECK-NEXT: pshufb
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; CHECK: ret
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}
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