diff options
Diffstat (limited to 'lib/CodeGen')
| -rw-r--r-- | lib/CodeGen/LiveIntervalAnalysis.cpp | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index dca305849e..141f8edc83 100644 --- a/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -1164,18 +1164,17 @@ private: unsigned Reg = MO.getReg(); - // TODO: Currently we're skipping uses that are reserved or have no - // interval, but we're not updating their kills. This should be - // fixed. - if (TargetRegisterInfo::isPhysicalRegister(Reg) && LIS.isReserved(Reg)) - continue; + // Don't track uses of reserved registers - they're not accurate. + // Reserved register live ranges look like a set of dead defs. + bool Resv = + TargetRegisterInfo::isPhysicalRegister(Reg) && LIS.isReserved(Reg); // Collect ranges for register units. These live ranges are computed on // demand, so just skip any that haven't been computed yet. if (TargetRegisterInfo::isPhysicalRegister(Reg)) { for (MCRegUnitIterator Units(Reg, &TRI); Units.isValid(); ++Units) if (LiveInterval *LI = LIS.getCachedRegUnit(*Units)) - collectRanges(MO, LI, Entering, Internal, Exiting, OldIdx); + collectRanges(MO, LI, Entering, Internal, Exiting, OldIdx, Resv); } else { // Collect ranges for individual virtual registers. collectRanges(MO, &LIS.getInterval(Reg), @@ -1186,8 +1185,8 @@ private: void collectRanges(const MachineOperand &MO, LiveInterval *LI, RangeSet &Entering, RangeSet &Internal, RangeSet &Exiting, - SlotIndex OldIdx) { - if (MO.readsReg()) { + SlotIndex OldIdx, bool IgnoreReads = false) { + if (!IgnoreReads && MO.readsReg()) { LiveRange* LR = LI->getLiveRangeContaining(OldIdx); if (LR != 0) Entering.insert(std::make_pair(LI, LR)); |