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Remove use of reverse iterators in repairIntervalsInRange(). While they were

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arguably better than forward iterators for this use case, they are confusing and
there are some implementation problems with reverse iterators and MI bundles.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175393 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Cameron Zwarich
2013-02-17 11:09:00 +00:00
parent 7324d4e593
commit 680c98f632
3 changed files with 18 additions and 21 deletions
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10
lib/CodeGen/MachineBasicBlock.cpp
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@@ -851,15 +851,7 @@ MachineBasicBlock::SplitCriticalEdge(MachineBasicBlock *Succ, Pass *P) {
// Update all intervals for registers whose uses may have been modified by
// updateTerminator().
iterator FirstTerminator = getFirstTerminator();
reverse_iterator PreTerminators;
if (FirstTerminator == begin())
PreTerminators = rend();
else if (FirstTerminator == end())
PreTerminators = rbegin();
else
PreTerminators = reverse_iterator(FirstTerminator);
LIS->repairIntervalsInRange(this, rbegin(), PreTerminators, UsedRegs);
LIS->repairIntervalsInRange(this, getFirstTerminator(), end(), UsedRegs);
}
if (MachineDominatorTree *MDT =