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LSR: Move set instead of copying. NFC.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229871 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2015-02-19 17:19:43 +00:00
parent 4dad5f2731
commit c69bd70cd1
1 changed files with 2 additions and 4 deletions
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6
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -1327,11 +1327,9 @@ void LSRUse::DeleteFormula(Formula &F) {
/// RecomputeRegs - Recompute the Regs field, and update RegUses.
void LSRUse::RecomputeRegs(size_t LUIdx, RegUseTracker &RegUses) {
// Now that we've filtered out some formulae, recompute the Regs set.
SmallPtrSet<const SCEV *, 4> OldRegs = Regs;
SmallPtrSet<const SCEV *, 4> OldRegs = std::move(Regs);
Regs.clear();
for (SmallVectorImpl<Formula>::const_iterator I = Formulae.begin(),
E = Formulae.end(); I != E; ++I) {
const Formula &F = *I;
for (const Formula &F : Formulae) {
if (F.ScaledReg) Regs.insert(F.ScaledReg);
Regs.insert(F.BaseRegs.begin(), F.BaseRegs.end());
}