+ // If this is the first basic block in the function, and if it has live ins
+ // that need to be copied into vregs, emit the copies into the top of the
+ // block before emitting the code for the block.
+ MachineFunction &MF = DAG.getMachineFunction();
+ if (&MF.front() == BB && MF.livein_begin() != MF.livein_end()) {
+ for (MachineFunction::livein_iterator LI = MF.livein_begin(),
+ E = MF.livein_end(); LI != E; ++LI)
+ if (LI->second)
+ MRI->copyRegToReg(*MF.begin(), MF.begin()->end(), LI->second,
+ LI->first, RegMap->getRegClass(LI->second));
+ }
+
+ DenseMap<SDNode*, unsigned> VRBaseMap;