diff options
Diffstat (limited to 'lib/CodeGen/PreAllocSplitting.cpp')
| -rw-r--r-- | lib/CodeGen/PreAllocSplitting.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/CodeGen/PreAllocSplitting.cpp b/lib/CodeGen/PreAllocSplitting.cpp index 3c8257f1da..ca4f7ec6f2 100644 --- a/lib/CodeGen/PreAllocSplitting.cpp +++ b/lib/CodeGen/PreAllocSplitting.cpp @@ -1219,6 +1219,10 @@ bool PreAllocSplitting::SplitRegLiveInterval(LiveInterval *LI) { MachineInstr *DefMI = (ValNo->def != ~0U) ? LIs->getInstructionFromIndex(ValNo->def) : NULL; + // If this would create a new join point, do not split. + if (DefMI && createsNewJoin(LR, DefMI->getParent(), Barrier->getParent())) + return false; + // Find all references in the barrier mbb. SmallPtrSet<MachineInstr*, 4> RefsInMBB; for (MachineRegisterInfo::reg_iterator I = MRI->reg_begin(CurrLI->reg), |