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[X86][AVX] More aggressively simplify BROADCAST source operand

Authored by RKSimon on Feb 3 2019, 6:39 AM.

Description

[X86][AVX] More aggressively simplify BROADCAST source operand

Aim to use scalar source or lowest 128-bit vector directly.

We're still missing some VZMOVL_LOAD combines.

llvm-svn: 352994

Details

Committed
RKSimonFeb 3 2019, 6:39 AM
Parents
rG3d6ecfc078e4: [x86] add CGP uaddo test with weird type; NFC
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