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[X86][AVX] Split VZEXT_MOVL ymm/zmm if the upper elements are not demanded.
authorSimon Pilgrim <llvm-dev@redking.me.uk>
Sun, 12 May 2019 15:16:29 +0000 (15:16 +0000)
committerSimon Pilgrim <llvm-dev@redking.me.uk>
Sun, 12 May 2019 15:16:29 +0000 (15:16 +0000)
commitec283e5c485daadc9cd3ea1821d793e99b4131ce
treec849611c0a1c8be238f562791dc39dfbeef9e650
parent092d25dd57cb60d92bc8676157537ddcdc569521
[X86][AVX] Split VZEXT_MOVL ymm/zmm if the upper elements are not demanded.

Removes unnecessary vzeroupper noted in D61806

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@360543 91177308-0d34-0410-b5e6-96231b3b80d8
lib/Target/X86/X86ISelLowering.cpp
test/CodeGen/X86/insertelement-zero.ll
test/CodeGen/X86/sad.ll