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Switch some getAliasSet clients to MCRegAliasIterator.

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MCRegAliasIterator can optionally visit the register itself, allowing
for simpler code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157837 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2012-06-01 20:36:54 +00:00
parent 73c2f7f5ed
commit f152fe8d48
8 changed files with 46 additions and 99 deletions
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5
lib/CodeGen/MachineCSE.cpp
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@ -216,11 +216,10 @@ bool MachineCSE::hasLivePhysRegDefUses(const MachineInstr *MI,
if (MO.isDef() &&
(MO.isDead() || isPhysDefTriviallyDead(Reg, I, MBB->end())))
continue;
PhysRefs.insert(Reg);
for (MCRegAliasIterator AI(Reg, TRI, true); AI.isValid(); ++AI)
PhysRefs.insert(*AI);
if (MO.isDef())
PhysDefs.push_back(Reg);
for (const uint16_t *Alias = TRI->getAliasSet(Reg); *Alias; ++Alias)
PhysRefs.insert(*Alias);
}
return !PhysRefs.empty();