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07edaf3801
- Folding (trunc (concat ... X )) to (concat ... (trunc X) ...) is valid when '...' are all 'undef's. - r166125 relies on this transformation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166155 91177308-0d34-0410-b5e6-96231b3b80d8
18 lines
648 B
LLVM
18 lines
648 B
LLVM
; RUN: llc < %s -mcpu=corei7 -mtriple=x86_64-unknown-linux-gnu | FileCheck %s
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define void @foo(<4 x float> %in, <4 x i8>* %out) {
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%t0 = fptosi <4 x float> %in to <4 x i32>
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%t1 = trunc <4 x i32> %t0 to <4 x i16>
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%t2 = shufflevector <4 x i16> %t1, <4 x i16> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
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%t3 = trunc <8 x i16> %t2 to <8 x i8>
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%t4 = shufflevector <8 x i8> %t3, <8 x i8> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
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%t5 = insertelement <4 x i8> %t4, i8 -1, i32 3
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store <4 x i8> %t5, <4 x i8>* %out
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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: pshufb
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; CHECK: ret
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}
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