ARMTargetMachine.cpp revision 876eaf1135b40869f59fb27c87a7d626459e9181 
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 "ARMTargetAsmInfo.h"
16#include "ARMFrameInfo.h"
17#include "ARM.h"
18#include "llvm/Module.h"
19#include "llvm/PassManager.h"
20#include "llvm/Support/CommandLine.h"
21#include "llvm/Target/TargetMachineRegistry.h"
22#include "llvm/Target/TargetOptions.h"
23using namespace llvm;
24
25static cl::opt<bool> DisableLdStOpti("disable-arm-loadstore-opti", cl::Hidden,
26                              cl::desc("Disable load store optimization pass"));
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  : Subtarget(M, FS),
37    DataLayout(Subtarget.isTargetDarwin() ?
38          (Subtarget.isThumb() ?
39           std::string("e-p:32:32-d:32:32-l:32:32-s:16:32-b:8:32-B:8:32-A:32") :
40           std::string("e-p:32:32-d:32:32-l:32:32")) :
41          (Subtarget.isThumb() ?
42           std::string("e-p:32:32-d:32:64-l:64:64-s:16:32-b:8:32-B:8:32-A:32") :
43           std::string("e-p:32:32-d:32:64-l:64:64"))),
44    InstrInfo(Subtarget),
45    FrameInfo(Subtarget) {}
46
47unsigned ARMTargetMachine::getModuleMatchQuality(const Module &M) {
48  std::string TT = M.getTargetTriple();
49  if (TT.size() >= 4 && std::string(TT.begin(), TT.begin()+4) == "arm-")
50    return 20;
51
52  if (M.getPointerSize() == Module::Pointer32)
53    return 1;
54  else
55    return 0;
56}
57
58
59const TargetAsmInfo *ARMTargetMachine::createTargetAsmInfo() const {
60  return new ARMTargetAsmInfo(*this);
61}
62
63
64// Pass Pipeline Configuration
65bool ARMTargetMachine::addInstSelector(FunctionPassManager &PM, bool Fast) {
66  PM.add(createARMISelDag(*this));
67  return false;
68}
69
70bool ARMTargetMachine::addPreEmitPass(FunctionPassManager &PM, bool Fast) {
71  // FIXME: temporarily disabling load / store optimization pass for Thumb mode.
72  if (!Fast && !DisableLdStOpti && !Subtarget.isThumb())
73    PM.add(createARMLoadStoreOptimizationPass());
74
75  PM.add(createARMConstantIslandPass());
76  return true;
77}
78
79bool ARMTargetMachine::addAssemblyEmitter(FunctionPassManager &PM, bool Fast,
80                                          std::ostream &Out) {
81  // Output assembly language.
82  PM.add(createARMCodePrinterPass(Out, *this));
83  return false;
84}
85