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//===-- LLVMTargetMachine.cpp - Implement the LLVMTargetMachine class -----===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Chris Lattner and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the LLVMTargetMachine class.
//
//===----------------------------------------------------------------------===//
#include "llvm/Target/TargetMachine.h"
#include "llvm/PassManager.h"
#include "llvm/Pass.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Transforms/Scalar.h"
#include <iostream>
using namespace llvm;
bool LLVMTargetMachine::addPassesToEmitFile(FunctionPassManager &PM,
std::ostream &Out,
CodeGenFileType FileType,
bool Fast) {
// Standard LLVM-Level Passes.
// Run loop strength reduction before anything else.
if (!Fast) PM.add(createLoopStrengthReducePass(getTargetLowering()));
// FIXME: Implement efficient support for garbage collection intrinsics.
PM.add(createLowerGCPass());
// FIXME: Implement the invoke/unwind instructions!
PM.add(createLowerInvokePass(getTargetLowering()));
// Make sure that no unreachable blocks are instruction selected.
PM.add(createUnreachableBlockEliminationPass());
// Ask the target for an isel.
if (addInstSelector(PM, Fast))
return true;
// Print the instruction selected machine code...
if (PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(&std::cerr));
// Perform register allocation to convert to a concrete x86 representation
PM.add(createRegisterAllocator());
if (PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(&std::cerr));
// Run post-ra passes.
if (addPostRegAlloc(PM, Fast) && PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(&std::cerr));
// Insert prolog/epilog code. Eliminate abstract frame index references...
PM.add(createPrologEpilogCodeInserter());
// Branch folding must be run after regalloc and prolog/epilog insertion.
if (!Fast)
PM.add(createBranchFoldingPass());
// Fold redundant debug labels.
PM.add(createDebugLabelFoldingPass());
if (PrintMachineCode) // Print the register-allocated code
PM.add(createMachineFunctionPrinterPass(&std::cerr));
if (addPreEmitPass(PM, Fast) && PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(&std::cerr));
switch (FileType) {
default: return true;
case TargetMachine::AssemblyFile:
if (addAssemblyEmitter(PM, Fast, Out))
return true;
break;
case TargetMachine::ObjectFile:
if (addObjectWriter(PM, Fast, Out))
return true;
break;
}
// Delete machine code for this function
PM.add(createMachineCodeDeleter());
return false; // success!
}
/// addPassesToEmitMachineCode - Add passes to the specified pass manager to
/// get machine code emitted. This uses a MachineCodeEmitter object to handle
/// actually outputting the machine code and resolving things like the address
/// of functions. This method should returns true if machine code emission is
/// not supported.
///
bool LLVMTargetMachine::addPassesToEmitMachineCode(FunctionPassManager &PM,
MachineCodeEmitter &MCE,
bool Fast) {
// Standard LLVM-Level Passes.
// Run loop strength reduction before anything else.
if (!Fast) PM.add(createLoopStrengthReducePass(getTargetLowering()));
// FIXME: Implement efficient support for garbage collection intrinsics.
PM.add(createLowerGCPass());
// FIXME: Implement the invoke/unwind instructions!
PM.add(createLowerInvokePass(getTargetLowering()));
// Make sure that no unreachable blocks are instruction selected.
PM.add(createUnreachableBlockEliminationPass());
// Ask the target for an isel.
if (addInstSelector(PM, Fast))
return true;
// Print the instruction selected machine code...
if (PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(&std::cerr));
// Perform register allocation to convert to a concrete x86 representation
PM.add(createRegisterAllocator());
if (PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(&std::cerr));
// Run post-ra passes.
if (addPostRegAlloc(PM, Fast) && PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(&std::cerr));
// Insert prolog/epilog code. Eliminate abstract frame index references...
PM.add(createPrologEpilogCodeInserter());
if (PrintMachineCode) // Print the register-allocated code
PM.add(createMachineFunctionPrinterPass(&std::cerr));
// Branch folding must be run after regalloc and prolog/epilog insertion.
if (!Fast)
PM.add(createBranchFoldingPass());
if (addPreEmitPass(PM, Fast) && PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(&std::cerr));
addCodeEmitter(PM, Fast, MCE);
// Delete machine code for this function
PM.add(createMachineCodeDeleter());
return false; // success!
}
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