///
SmallPtrSet<MachineInstr*, 32> ReMatCopies;
+ /// ReMatDefs - Keep track of definition instructions which have
+ /// been remat'ed.
+ SmallPtrSet<MachineInstr*, 8> ReMatDefs;
+
public:
static char ID; // Pass identifcation, replacement for typeid
SimpleRegisterCoalescing() : MachineFunctionPass(&ID) {}
bool isProfitableToCoalesceToSubRC(unsigned SrcReg, unsigned DstReg,
MachineBasicBlock *MBB);
+ /// HasIncompatibleSubRegDefUse - If we are trying to coalesce a virtual
+ /// register with a physical register, check if any of the virtual register
+ /// operand is a sub-register use or def. If so, make sure it won't result
+ /// in an illegal extract_subreg or insert_subreg instruction.
+ bool HasIncompatibleSubRegDefUse(MachineInstr *CopyMI,
+ unsigned VirtReg, unsigned PhysReg);
+
/// RangeIsDefinedByCopyFromReg - Return true if the specified live range of
/// the specified live interval is defined by a copy from the specified
/// register.