Revert r150565 again. Appears to be a stage2 failure with dragonegg.

[oota-llvm.git] / lib / CodeGen / InterferenceCache.cpp

diff --git a/lib/CodeGen/InterferenceCache.cpp b/lib/CodeGen/InterferenceCache.cpp
index a8a32f3f1a7ce12c9d790098790b6c918a61f645..9eb8a7584368f8e3ec639b10afdb1ce6111971b3 100644 (file)
--- a/lib/CodeGen/InterferenceCache.cpp
+++ b/lib/CodeGen/InterferenceCache.cpp
@@ -185,7 +185,8 @@ void InterferenceCache::Entry::update(unsigned MBBNum) {
 
   // Also check for register mask interference.
   SlotIndex Limit = BI->Last.isValid() ? BI->Last : Start;
-  for (unsigned i = RegMaskSlots.size(); i && RegMaskSlots[i-1] > Limit; --i)
+  for (unsigned i = RegMaskSlots.size();
+       i && RegMaskSlots[i-1].getDeadSlot() > Limit; --i)
     if (MachineOperand::clobbersPhysReg(RegMaskBits[i-1], PhysReg)) {
       // Register mask i-1 clobbers PhysReg after the LIU interference.
       // Model the regmask clobber as a dead def.