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authorCraig Topper <craig.topper@intel.com>2017-12-09 07:02:19 +0000
committerCraig Topper <craig.topper@intel.com>2017-12-09 07:02:19 +0000
commitb3e14ce90ccc04da0bb2a4b5c62a3f1befcd45c3 (patch)
treecefec7aa245070a282bae5d7ce908d4f68c9bd1d /clang/lib/Frontend/CompilerInvocation.cpp
parent80463fe64dec84e92764f9a796870f3be404455d (diff)
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[X86] Improve lowering of concats of mask vectors to better optimize zero vector inputs.
We were previously using kunpck with zero inputs unnecessarily. And we had cases where we would insert into a zero vector and then insert into larger zero vector incurring two sets of shifts. llvm-svn: 320244
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