src/gallium/drivers/radeon/AMDGPUConvertToISA.cpp

   1 //===-- AMDGPUConvertToISA.cpp - Lower AMDIL to HW ISA --------------------===//
   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 pass lowers AMDIL machine instructions to the appropriate hardware
  11 // instructions.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "AMDGPU.h"
  16 #include "AMDGPUInstrInfo.h"
  17 #include "llvm/CodeGen/MachineFunctionPass.h"
  18
  19 using namespace llvm;
  20
  21 namespace {
  22   class AMDGPUConvertToISAPass : public MachineFunctionPass {
  23
  24   private:
  25     static char ID;
  26     TargetMachine &TM;
  27
  28     void lowerFLT(MachineInstr &MI);
  29
  30   public:
  31     AMDGPUConvertToISAPass(TargetMachine &tm) :
  32       MachineFunctionPass(ID), TM(tm) { }
  33
  34     virtual bool runOnMachineFunction(MachineFunction &MF);
  35
  36   };
  37 } /* End anonymous namespace */
  38
  39 char AMDGPUConvertToISAPass::ID = 0;
  40
  41 FunctionPass *llvm::createAMDGPUConvertToISAPass(TargetMachine &tm) {
  42   return new AMDGPUConvertToISAPass(tm);
  43 }
  44
  45 bool AMDGPUConvertToISAPass::runOnMachineFunction(MachineFunction &MF)
  46 {
  47   const AMDGPUInstrInfo * TII =
  48                       static_cast<const AMDGPUInstrInfo*>(TM.getInstrInfo());
  49
  50   for (MachineFunction::iterator BB = MF.begin(), BB_E = MF.end();
  51                                                   BB != BB_E; ++BB) {
  52     MachineBasicBlock &MBB = *BB;
  53     for (MachineBasicBlock::iterator I = MBB.begin(), Next = llvm::next(I);
  54          I != MBB.end(); I = Next, Next = llvm::next(I) ) {
  55       MachineInstr &MI = *I;
  56       MachineInstr * newInstr = TII->convertToISA(MI, MF, MBB.findDebugLoc(I));
  57       if (!newInstr) {
  58         continue;
  59       }
  60       MBB.insert(I, newInstr);
  61       MI.eraseFromParent();
  62     }
  63   }
  64   return false;
  65 }