I accidentally removed this check in an earlier commit, which cause breakage in the pre alloc splitter.

llvm-svn: 62678
2009-01-21 08:18:03 +00:00 · 2009-01-21 08:18:03 +00:00 · fe48dfa0f2
parent 3029b35faa
commit fe48dfa0f2
1 changed files with 4 additions and 0 deletions
--- a/llvm/lib/CodeGen/PreAllocSplitting.cpp
+++ b/llvm/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),