/// two registers can be coalesced, CoalescerPair can determine if a copy
/// instruction would become an identity copy after coalescing.
class CoalescerPair {
- const TargetInstrInfo &TII;
const TargetRegisterInfo &TRI;
/// DstReg - The register that will be left after coalescing. It can be a
const TargetRegisterClass *NewRC;
public:
- CoalescerPair(const TargetInstrInfo &tii, const TargetRegisterInfo &tri)
- : TII(tii), TRI(tri), DstReg(0), SrcReg(0), DstIdx(0), SrcIdx(0),
+ CoalescerPair(const TargetRegisterInfo &tri)
+ : TRI(tri), DstReg(0), SrcReg(0), DstIdx(0), SrcIdx(0),
+ Partial(false), CrossClass(false), Flipped(false), NewRC(0) {}
+
+ /// Create a CoalescerPair representing a virtreg-to-physreg copy.
+ /// No need to call setRegisters().
+ CoalescerPair(unsigned VirtReg, unsigned PhysReg,
+ const TargetRegisterInfo &tri)
+ : TRI(tri), DstReg(PhysReg), SrcReg(VirtReg), DstIdx(0), SrcIdx(0),
Partial(false), CrossClass(false), Flipped(false), NewRC(0) {}
/// setRegisters - set registers to match the copy instruction MI. Return