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7ca099f727
- Check index being extracted to be constant 0 before simplfiying. Otherwise, retain the original sequence. llvm-svn: 166504
39 lines
1.2 KiB
LLVM
39 lines
1.2 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-linux-pc -mcpu=corei7 | FileCheck %s
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declare <4 x i32> @llvm.x86.sse41.pminud(<4 x i32>, <4 x i32>)
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define <2 x i16> @good(<4 x i32>*, <4 x i8>*) {
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entry:
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%2 = load <4 x i32>* %0, align 16
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%3 = call <4 x i32> @llvm.x86.sse41.pminud(<4 x i32> %2, <4 x i32> <i32 127, i32 127, i32 127, i32 127>)
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%4 = extractelement <4 x i32> %3, i32 0
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%5 = extractelement <4 x i32> %3, i32 1
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%6 = extractelement <4 x i32> %3, i32 2
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%7 = extractelement <4 x i32> %3, i32 3
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%8 = bitcast i32 %4 to <2 x i16>
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%9 = bitcast i32 %5 to <2 x i16>
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ret <2 x i16> %8
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; CHECK: good
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; CHECK: pminud
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; CHECK-NEXT: pmovzxwq
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; CHECK: ret
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}
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define <2 x i16> @bad(<4 x i32>*, <4 x i8>*) {
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entry:
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%2 = load <4 x i32>* %0, align 16
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%3 = call <4 x i32> @llvm.x86.sse41.pminud(<4 x i32> %2, <4 x i32> <i32 127, i32 127, i32 127, i32 127>)
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%4 = extractelement <4 x i32> %3, i32 0
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%5 = extractelement <4 x i32> %3, i32 1
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%6 = extractelement <4 x i32> %3, i32 2
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%7 = extractelement <4 x i32> %3, i32 3
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%8 = bitcast i32 %4 to <2 x i16>
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%9 = bitcast i32 %5 to <2 x i16>
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ret <2 x i16> %9
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; CHECK: bad
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; CHECK: pminud
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; CHECK: pextrd
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; CHECK: pmovzxwq
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; CHECK: ret
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}
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