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RegisterPressure: Add PressureDiff::dump()

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Also display the pressure diff in the case of a
getMaxUpwardPressureDelta() verify failure.

llvm-svn: 241759
This commit is contained in:
Matthias Braun 2015-07-08 23:40:27 +00:00
parent 24c6a55664
commit 08e0b80601
2 changed files with 14 additions and 0 deletions
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2
include/llvm/CodeGen/RegisterPressure.h
View File

@ -135,6 +135,8 @@ public:
void addPressureChange(unsigned RegUnit, bool IsDec,
const MachineRegisterInfo *MRI);
LLVM_DUMP_METHOD void dump(const TargetRegisterInfo &TRI) const;
};
/// Array of PressureDiffs.

12
lib/CodeGen/RegisterPressure.cpp
View File

@ -77,6 +77,16 @@ void RegPressureTracker::dump() const {
P.dump(TRI);
}
void PressureDiff::dump(const TargetRegisterInfo &TRI) const {
for (const PressureChange &Change : *this) {
if (!Change.isValid() || Change.getUnitInc() == 0)
continue;
dbgs() << " " << TRI.getRegPressureSetName(Change.getPSet())
<< " " << Change.getUnitInc();
}
dbgs() << '\n';
}
/// Increase the current pressure as impacted by these registers and bump
/// the high water mark if needed.
void RegPressureTracker::increaseRegPressure(ArrayRef<unsigned> RegUnits) {
@ -787,6 +797,8 @@ getMaxUpwardPressureDelta(const MachineInstr *MI, PressureDiff *PDiff,
RegPressureDelta Delta2;
getUpwardPressureDelta(MI, *PDiff, Delta2, CriticalPSets, MaxPressureLimit);
if (Delta != Delta2) {
dbgs() << "PDiff: ";
PDiff->dump(*TRI);
dbgs() << "DELTA: " << *MI;
if (Delta.Excess.isValid())
dbgs() << "Excess1 " << TRI->getRegPressureSetName(Delta.Excess.getPSet())