diff options
Diffstat (limited to 'lib/CodeGen/LiveIntervalAnalysis.cpp')
| -rw-r--r-- | lib/CodeGen/LiveIntervalAnalysis.cpp | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index 29be67bf60..b5c21952fa 100644 --- a/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -477,8 +477,8 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb, assert(interval.containsOneValue()); unsigned DefIndex = getDefIndex(interval.getValNumInfo(0)->def); unsigned RedefIndex = getDefIndex(MIIdx); - // It cannot be an early clobber MO. - assert(!MO.isEarlyClobber() && "Unexpected early clobber!"); + if (MO.isEarlyClobber()) + RedefIndex = getUseIndex(MIIdx); const LiveRange *OldLR = interval.getLiveRangeContaining(RedefIndex-1); VNInfo *OldValNo = OldLR->valno; @@ -499,6 +499,8 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb, // Value#0 is now defined by the 2-addr instruction. OldValNo->def = RedefIndex; OldValNo->copy = 0; + if (MO.isEarlyClobber()) + OldValNo->redefByEC = true; // Add the new live interval which replaces the range for the input copy. LiveRange LR(DefIndex, RedefIndex, ValNo); @@ -546,8 +548,8 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb, // live until the end of the block. We've already taken care of the // rest of the live range. unsigned defIndex = getDefIndex(MIIdx); - // It cannot be an early clobber MO. - assert(!MO.isEarlyClobber() && "Unexpected early clobber!"); + if (MO.isEarlyClobber()) + defIndex = getUseIndex(MIIdx); VNInfo *ValNo; MachineInstr *CopyMI = NULL; |