1 //===-- PTXRegAlloc.cpp - PTX Register Allocator --------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file contains a register allocator for PTX code. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #define DEBUG_TYPE "ptx-reg-alloc" 15 16 #include "PTX.h" 17 #include "llvm/CodeGen/MachineFunctionPass.h" 18 #include "llvm/CodeGen/RegAllocRegistry.h" 19 20 using namespace llvm; 21 22 namespace { 23 // Special register allocator for PTX. 24 class PTXRegAlloc : public MachineFunctionPass { 25 public: 26 static char ID; 27 PTXRegAlloc() : MachineFunctionPass(ID) { 28 initializePHIEliminationPass(*PassRegistry::getPassRegistry()); 29 initializeTwoAddressInstructionPassPass(*PassRegistry::getPassRegistry()); 30 } 31 32 virtual const char* getPassName() const { 33 return "PTX Register Allocator"; 34 } 35 36 virtual void getAnalysisUsage(AnalysisUsage &AU) const { 37 AU.setPreservesCFG(); 38 AU.addRequiredID(PHIEliminationID); 39 AU.addRequiredID(TwoAddressInstructionPassID); 40 MachineFunctionPass::getAnalysisUsage(AU); 41 } 42 43 virtual bool runOnMachineFunction(MachineFunction &MF) { 44 // We do not actually do anything (at least not yet). 45 return false; 46 } 47 }; 48 49 char PTXRegAlloc::ID = 0; 50 51 static RegisterRegAlloc 52 ptxRegAlloc("ptx", "PTX register allocator", createPTXRegisterAllocator); 53 } 54 55 FunctionPass *llvm::createPTXRegisterAllocator() { 56 return new PTXRegAlloc(); 57 } 58 59
