/// registers that are both defined and used by the instruction. If a pressure
/// difference pointer is provided record the changes is pressure caused by this
/// instruction independent of liveness.
-bool RegPressureTracker::recede(SmallVectorImpl<unsigned> *LiveUses,
+void RegPressureTracker::recede(SmallVectorImpl<unsigned> *LiveUses,
PressureDiff *PDiff) {
- // Check for the top of the analyzable region.
- if (CurrPos == MBB->begin()) {
- closeRegion();
- return false;
- }
+ assert(CurrPos != MBB->begin());
if (!isBottomClosed())
closeBottom();
do
--CurrPos;
while (CurrPos != MBB->begin() && CurrPos->isDebugValue());
+ assert(!CurrPos->isDebugValue());
- if (CurrPos->isDebugValue()) {
- closeRegion();
- return false;
- }
SlotIndex SlotIdx;
if (RequireIntervals)
SlotIdx = LIS->getInstructionIndex(CurrPos).getRegSlot();
UntiedDefs.insert(Reg);
}
}
- return true;
}
/// Advance across the current instruction.
-bool RegPressureTracker::advance() {
+void RegPressureTracker::advance() {
assert(!TrackUntiedDefs && "unsupported mode");
- // Check for the bottom of the analyzable region.
- if (CurrPos == MBB->end()) {
- closeRegion();
- return false;
- }
+ assert(CurrPos != MBB->end());
if (!isTopClosed())
closeTop();
do
++CurrPos;
while (CurrPos != MBB->end() && CurrPos->isDebugValue());
- return true;
}
/// Find the max change in excess pressure across all sets.