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RegisterPressure: If we do not collect dead defs the list must be empty

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254372 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matthias Braun 2015-12-01 04:20:06 +00:00
parent bce24cfb9e
commit 104db6b94a
1 changed files with 1 additions and 5 deletions
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6
lib/CodeGen/RegisterPressure.cpp
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@ -734,11 +734,7 @@ void RegPressureTracker::bumpUpwardPressure(const MachineInstr *MI) {
// Account for register pressure similar to RegPressureTracker::recede().
RegisterOperands RegOpers;
RegOpers.collect(*MI, *TRI, *MRI, /*IgnoreDead=*/true);
// Boost max pressure for all dead defs together.
// Since CurrSetPressure and MaxSetPressure
increaseRegPressure(RegOpers.DeadDefs);
decreaseRegPressure(RegOpers.DeadDefs);
assert(RegOpers.DeadDefs.size() == 0);
// Kill liveness at live defs.
for (unsigned i = 0, e = RegOpers.Defs.size(); i < e; ++i) {