[llvm-commits] [llvm] r62678 - /llvm/trunk/lib/CodeGen/PreAllocSplitting.cpp

[Owen Anderson]

Author: resistor
Date: Wed Jan 21 02:18:03 2009
New Revision: 62678

URL: http://llvm.org/viewvc/llvm-project?rev=62678&view=rev
Log:
I accidentally removed this check in an earlier commit, which cause breakage in the pre alloc splitter.

Modified:
    llvm/trunk/lib/CodeGen/PreAllocSplitting.cpp

Modified: llvm/trunk/lib/CodeGen/PreAllocSplitting.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/PreAllocSplitting.cpp?rev=62678&r1=62677&r2=62678&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/PreAllocSplitting.cpp (original)
+++ llvm/trunk/lib/CodeGen/PreAllocSplitting.cpp Wed Jan 21 02:18:03 2009
@@ -1219,6 +1219,10 @@
   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),