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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 | 2e267ae7b8caf7192a3793eb3b78937ff83f794d (patch) | |
| tree | e283338b36954c69f967b75ebbcf732b65e17c86 /lib/CodeGen/LiveRangeEdit.cpp | |
| parent | 1adc215ddcadcfaaa07a8e93f48a8f62c4561afe (diff) | |
| download | external_llvm-2e267ae7b8caf7192a3793eb3b78937ff83f794d.zip external_llvm-2e267ae7b8caf7192a3793eb3b78937ff83f794d.tar.gz external_llvm-2e267ae7b8caf7192a3793eb3b78937ff83f794d.tar.bz2 | |
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
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153914 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/LiveRangeEdit.cpp')
| -rw-r--r-- | lib/CodeGen/LiveRangeEdit.cpp | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/lib/CodeGen/LiveRangeEdit.cpp b/lib/CodeGen/LiveRangeEdit.cpp index 52e366c..4ecb2d9 100644 --- a/lib/CodeGen/LiveRangeEdit.cpp +++ b/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) { |