llvm-6502/test/CodeGen/X86/vec_shuffle-30.ll
Mon P Wang 7bcaefaf59 Fixes a case where we generate an incorrect mask for pshfhw in the presence
of undefs and incorrectly determining if we have punpckldq.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63702 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-04 01:16:59 +00:00

23 lines
862 B
LLVM

; RUN: llvm-as < %s | llc -march=x86 -mattr=sse41 -disable-mmx -o %t -f
; RUN: grep pshufhw %t | grep 161 | count 1
; RUN: grep pslldq %t | count 1
; Test case when creating pshufhw, we incorrectly set the higher order bit
; for an undef,
define void @test(<8 x i16>* %dest, <8 x i16> %in) {
entry:
%0 = load <8 x i16>* %dest
%1 = shufflevector <8 x i16> %0, <8 x i16> %in, <8 x i32> < i32 0, i32 1, i32 2, i32 3, i32 13, i32 undef, i32 14, i32 14>
store <8 x i16> %1, <8 x i16>* %dest
ret void
}
; A test case where we shouldn't generate a punpckldq but a pshufd and a pslldq
define void @test2(<4 x i32>* %dest, <4 x i32> %in) {
entry:
%0 = shufflevector <4 x i32> %in, <4 x i32> <i32 0, i32 0, i32 0, i32 0>, <4 x i32> < i32 undef, i32 5, i32 undef, i32 2>
store <4 x i32> %0, <4 x i32>* %dest
ret void
}