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LiveIntervalAnalysis: Factor out code to update liveness on physreg def removal

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This cleans up code and is more in line with the general philosophy of
modifying LiveIntervals through LiveIntervalAnalysis instead of changing
them directly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226687 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matthias Braun
2015-01-21 18:50:21 +00:00
parent 5a9462587d
commit 1458e05967
5 changed files with 19 additions and 25 deletions
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9
lib/CodeGen/InlineSpiller.cpp
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@ -1142,13 +1142,8 @@ foldMemoryOperand(ArrayRef<std::pair<MachineInstr*, unsigned> > Ops,
continue;
// FoldMI does not define this physreg. Remove the LI segment.
assert(MO->isDead() && "Cannot fold physreg def");
for (MCRegUnitIterator Units(Reg, &TRI); Units.isValid(); ++Units) {
if (LiveRange *LR = LIS.getCachedRegUnit(*Units)) {
SlotIndex Idx = LIS.getInstructionIndex(MI).getRegSlot();
if (VNInfo *VNI = LR->getVNInfoAt(Idx))
LR->removeValNo(VNI);
}
}
SlotIndex Idx = LIS.getInstructionIndex(MI).getRegSlot();
LIS.removePhysRegDefAt(Reg, Idx);
}
LIS.ReplaceMachineInstrInMaps(MI, FoldMI);