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265bcb1e5b
- In addition to undefined, if V2 is zero vector, skip 2nd PSHUFB and POR as well as PSHUFB will zero elements with negative indices. Patch by Sriram Murali <sriram.murali@intel.com> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163018 91177308-0d34-0410-b5e6-96231b3b80d8
11 lines
435 B
LLVM
11 lines
435 B
LLVM
; RUN: llc -asm-verbose -mtriple=x86_64-unknown-unknown -mcpu=corei7 < %s | FileCheck %s
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define <16 x i8> @shuf(<16 x i8> %inval1) {
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entry:
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%0 = shufflevector <16 x i8> %inval1, <16 x i8> zeroinitializer, <16 x i32> <i32 0, i32 4, i32 3, i32 2, i32 16, i32 16, i32 3, i32 4, i32 0, i32 4, i32 3, i32 2, i32 16, i32 16, i32 3, i32 4>
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ret <16 x i8> %0
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; CHECK: shuf
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; CHECK: # BB#0: # %entry
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; CHECK-NEXT: pshufb
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; CHECK-NEXT: ret
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}
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