diff options
Diffstat (limited to 'lib/CodeGen/LiveRangeEdit.cpp')
| -rw-r--r-- | lib/CodeGen/LiveRangeEdit.cpp | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/lib/CodeGen/LiveRangeEdit.cpp b/lib/CodeGen/LiveRangeEdit.cpp index 04f92adefd..ca64729ab9 100644 --- a/lib/CodeGen/LiveRangeEdit.cpp +++ b/lib/CodeGen/LiveRangeEdit.cpp @@ -30,15 +30,23 @@ STATISTIC(NumFracRanges, "Number of live ranges fractured by DCE"); void LiveRangeEdit::Delegate::anchor() { } -LiveInterval &LiveRangeEdit::createFrom(unsigned OldReg) { +LiveInterval &LiveRangeEdit::createEmptyIntervalFrom(unsigned OldReg) { unsigned VReg = MRI.createVirtualRegister(MRI.getRegClass(OldReg)); if (VRM) { VRM->setIsSplitFromReg(VReg, VRM->getOriginal(OldReg)); } - LiveInterval &LI = LIS.getOrCreateInterval(VReg); + LiveInterval &LI = LIS.createEmptyInterval(VReg); return LI; } +unsigned LiveRangeEdit::createFrom(unsigned OldReg) { + unsigned VReg = MRI.createVirtualRegister(MRI.getRegClass(OldReg)); + if (VRM) { + VRM->setIsSplitFromReg(VReg, VRM->getOriginal(OldReg)); + } + return VReg; +} + bool LiveRangeEdit::checkRematerializable(VNInfo *VNI, const MachineInstr *DefMI, AliasAnalysis *aa) { @@ -368,7 +376,7 @@ void LiveRangeEdit::eliminateDeadDefs(SmallVectorImpl<MachineInstr*> &Dead, DEBUG(dbgs() << NumComp << " components: " << *LI << '\n'); SmallVector<LiveInterval*, 8> Dups(1, LI); for (unsigned i = 1; i != NumComp; ++i) { - Dups.push_back(&createFrom(LI->reg)); + Dups.push_back(&createEmptyIntervalFrom(LI->reg)); // If LI is an original interval that hasn't been split yet, make the new // intervals their own originals instead of referring to LI. The original // interval must contain all the split products, and LI doesn't. |