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[MCA] Avoid an InstrDesc copy in mca::LSUnit::reserve.

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Summary:
InstrDesc contains 4 vectors (as well as some other data), so it's
expensive to copy.

Authored By: orodley

Reviewers: andreadb, mattd, dberris

Reviewed By: mattd, dberris

Subscribers: dberris, gbedwell, llvm-commits

Differential Revision: https://reviews.llvm.org/D49775

llvm-svn: 337985
This commit is contained in:
Dean Michael Berris 2018-07-26 00:02:54 +00:00
parent 9b3b498f03
commit 79adceb6c6
1 changed files with 1 additions and 1 deletions
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2
tools/llvm-mca/LSUnit.cpp
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@ -52,7 +52,7 @@ void LSUnit::assignSQSlot(unsigned Index) {
}
bool LSUnit::reserve(const InstRef &IR) {
const InstrDesc Desc = IR.getInstruction()->getDesc();
const InstrDesc &Desc = IR.getInstruction()->getDesc();
unsigned MayLoad = Desc.MayLoad;
unsigned MayStore = Desc.MayStore;
unsigned IsMemBarrier = Desc.HasSideEffects;