ARMTargetMachine.cpp revision ec46ea34dcc615558294e9e0dbd0dd0f2894f574 
1//===-- ARMTargetMachine.cpp - Define TargetMachine for ARM ---------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file was developed by the "Instituto Nokia de Tecnologia" and
6// is distributed under the University of Illinois Open Source
7// License. See LICENSE.TXT for details.
8//
9//===----------------------------------------------------------------------===//
10//
11//
12//===----------------------------------------------------------------------===//
13
14#include "ARMTargetMachine.h"
15#include "ARMFrameInfo.h"
16#include "ARM.h"
17#include "llvm/Assembly/PrintModulePass.h"
18#include "llvm/Module.h"
19#include "llvm/PassManager.h"
20#include "llvm/CodeGen/MachineFunction.h"
21#include "llvm/CodeGen/Passes.h"
22#include "llvm/Target/TargetOptions.h"
23#include "llvm/Target/TargetMachineRegistry.h"
24#include "llvm/Transforms/Scalar.h"
25#include <iostream>
26using namespace llvm;
27
28namespace {
29  // Register the target.
30  RegisterTarget<ARMTargetMachine> X("arm", "  ARM");
31}
32
33/// TargetMachine ctor - Create an ILP32 architecture model
34///
35ARMTargetMachine::ARMTargetMachine(const Module &M, const std::string &FS)
36  : TargetMachine("ARM"), DataLayout("E-p:32:32"),
37    FrameInfo() {
38}
39
40unsigned ARMTargetMachine::getModuleMatchQuality(const Module &M) {
41  std::string TT = M.getTargetTriple();
42  if (TT.size() >= 4 && std::string(TT.begin(), TT.begin()+4) == "arm-")
43    return 20;
44
45  if (M.getPointerSize() == Module::Pointer32)
46    return 1;
47  else
48    return 0;
49}
50
51/// addPassesToEmitFile - Add passes to the specified pass manager
52/// to implement a static compiler for this target.
53///
54bool ARMTargetMachine::addPassesToEmitFile(PassManager &PM, std::ostream &Out,
55                                             CodeGenFileType FileType,
56                                             bool Fast) {
57  if (FileType != TargetMachine::AssemblyFile)
58    return true;
59
60  // Run loop strength reduction before anything else.
61  if (!Fast)
62    PM.add(createLoopStrengthReducePass());
63
64  // FIXME: Implement efficient support for garbage collection intrinsics.
65  PM.add(createLowerGCPass());
66
67  // FIXME: implement the invoke/unwind instructions!
68  PM.add(createLowerInvokePass());
69
70  // Print LLVM code input to instruction selector:
71  if (PrintMachineCode)
72    PM.add(new PrintFunctionPass());
73
74  // Make sure that no unreachable blocks are instruction selected.
75  PM.add(createUnreachableBlockEliminationPass());
76
77  PM.add(createARMISelDag(*this));
78
79  // Print machine instructions as they were initially generated.
80  if (PrintMachineCode)
81    PM.add(createMachineFunctionPrinterPass(&std::cerr));
82
83  PM.add(createRegisterAllocator());
84  PM.add(createPrologEpilogCodeInserter());
85
86  // Print machine instructions after register allocation and prolog/epilog
87  // insertion.
88  if (PrintMachineCode)
89    PM.add(createMachineFunctionPrinterPass(&std::cerr));
90
91  // Output assembly language.
92  PM.add(createARMCodePrinterPass(Out, *this));
93
94  // Delete the MachineInstrs we generated, since they're no longer needed.
95  PM.add(createMachineCodeDeleter());
96  return false;
97}
98
99