diff options
| -rw-r--r-- | include/llvm/CodeGen/MachineFunction.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/MachineFunction.h b/include/llvm/CodeGen/MachineFunction.h index e6d9eb1bf8..94e9470b76 100644 --- a/include/llvm/CodeGen/MachineFunction.h +++ b/include/llvm/CodeGen/MachineFunction.h @@ -97,6 +97,13 @@ class MachineFunction : private Annotation { // numbered and this vector keeps track of the mapping from ID's to MBB's. std::vector<MachineBasicBlock*> MBBNumbering; + /// UsedPhysRegs - This is a new[]'d array of bools that is computed and set + /// by the register allocator, and must be kept up to date by passes that run + /// after register allocation (though most don't modify this). This is used + /// so that the code generator knows which callee save registers to save and + /// for other target specific uses. + bool *UsedPhysRegs; + public: MachineFunction(const Function *Fn, const TargetMachine &TM); ~MachineFunction(); @@ -138,6 +145,25 @@ public: return static_cast<Ty*>(MFInfo); } + /// setUsedPhysRegs - The register allocator should call this to initialized + /// the UsedPhysRegs set. This should be passed a new[]'d array with entries + /// for all of the physical registers that the target supports. Each array + /// entry should be set to true iff the physical register is used within the + /// function. + void setUsedPhysRegs(bool *UPR) { UsedPhysRegs = UPR; } + + /// getUsedPhysregs - This returns the UsedPhysRegs array. This returns null + /// before register allocation. + const bool *getUsedPhysregs() { return UsedPhysRegs; } + + /// isPhysRegUsed - Return true if the specified register is used in this + /// function. This only works after register allocation. + bool isPhysRegUsed(unsigned Reg) { return UsedPhysRegs[Reg]; } + + /// changePhyRegUsed - This method allows code that runs after register + /// allocation to keep the PhysRegsUsed array up-to-date. + void changePhyRegUsed(unsigned Reg, bool State) { UsedPhysRegs[Reg] = State; } + /// getBlockNumbered - MachineBasicBlocks are automatically numbered when they /// are inserted into the machine function. The block number for a machine /// basic block can be found by using the MBB::getBlockNumber method, this |