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| author | Pete Cooper <peter_cooper@apple.com> | 2012-04-03 00:28:46 +0000 |
|---|---|---|
| committer | Pete Cooper <peter_cooper@apple.com> | 2012-04-03 00:28:46 +0000 |
| commit | 4f0dbb27d930773cc9f0aef23d247e74a5f96ba2 (patch) | |
| tree | 28197b2ee01c5115370a469fbca2a7541b81dc99 /llvm/lib | |
| parent | b75f4e5e9b1852274e8b01bb38c6151a18fbaee3 (diff) | |
| download | bcm5719-llvm-4f0dbb27d930773cc9f0aef23d247e74a5f96ba2.tar.gz bcm5719-llvm-4f0dbb27d930773cc9f0aef23d247e74a5f96ba2.zip | |
Fixes to r153903. Added missing explanation of behaviour when the VirtRegMap is NULL. Also changed it in this case to just avoid updating the map, but live ranges or intervals will still get updated and created
llvm-svn: 153914
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/LiveRangeEdit.cpp | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/llvm/lib/CodeGen/LiveRangeEdit.cpp b/llvm/lib/CodeGen/LiveRangeEdit.cpp index 52e366cb7d4..4ecb2d9a60a 100644 --- a/llvm/lib/CodeGen/LiveRangeEdit.cpp +++ b/llvm/lib/CodeGen/LiveRangeEdit.cpp @@ -33,8 +33,10 @@ void LiveRangeEdit::Delegate::anchor() { } LiveInterval &LiveRangeEdit::createFrom(unsigned OldReg) { unsigned VReg = MRI.createVirtualRegister(MRI.getRegClass(OldReg)); - VRM->grow(); - VRM->setIsSplitFromReg(VReg, VRM->getOriginal(OldReg)); + if (VRM) { + VRM->grow(); + VRM->setIsSplitFromReg(VReg, VRM->getOriginal(OldReg)); + } LiveInterval &LI = LIS.getOrCreateInterval(VReg); newRegs_.push_back(&LI); return LI; @@ -270,8 +272,6 @@ void LiveRangeEdit::eliminateDeadDefs(SmallVectorImpl<MachineInstr*> &Dead, delegate_->LRE_WillShrinkVirtReg(LI->reg); if (!LIS.shrinkToUses(LI, &Dead)) continue; - if (!VRM) - continue; // Don't create new intervals for a register being spilled. // The new intervals would have to be spilled anyway so its not worth it. @@ -295,7 +295,7 @@ void LiveRangeEdit::eliminateDeadDefs(SmallVectorImpl<MachineInstr*> &Dead, if (NumComp <= 1) continue; ++NumFracRanges; - bool IsOriginal = VRM->getOriginal(LI->reg) == LI->reg; + bool IsOriginal = VRM && VRM->getOriginal(LI->reg) == LI->reg; DEBUG(dbgs() << NumComp << " components: " << *LI << '\n'); SmallVector<LiveInterval*, 8> Dups(1, LI); for (unsigned i = 1; i != NumComp; ++i) { |
