PPCTargetMachine.cpp revision af89fa609bce1004c9ea9737d9fdb32f4224ef1c 
1//===-- PPCTargetMachine.cpp - Define TargetMachine for PowerPC -----------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file was developed by the LLVM research group and is distributed under
6// the University of Illinois Open Source License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// Top-level implementation for the PowerPC target.
11//
12//===----------------------------------------------------------------------===//
13
14#include "PPC.h"
15#include "PPCFrameInfo.h"
16#include "PPCTargetMachine.h"
17#include "PPCJITInfo.h"
18#include "llvm/Module.h"
19#include "llvm/PassManager.h"
20#include "llvm/Analysis/Verifier.h"
21#include "llvm/CodeGen/MachineFunction.h"
22#include "llvm/CodeGen/Passes.h"
23#include "llvm/Target/TargetOptions.h"
24#include "llvm/Target/TargetMachineRegistry.h"
25#include "llvm/Transforms/Scalar.h"
26#include "llvm/Support/CommandLine.h"
27#include <iostream>
28using namespace llvm;
29
30namespace {
31  // Register the targets
32  RegisterTarget<PPC32TargetMachine>
33  X("ppc32", "  PowerPC 32");
34  RegisterTarget<PPC64TargetMachine>
35  Y("ppc64", "  PowerPC 64");
36}
37
38unsigned PPC32TargetMachine::getJITMatchQuality() {
39#if defined(__POWERPC__) || defined (__ppc__) || defined(_POWER)
40  if (sizeof(void*) == 4)
41    return 10;
42#else
43  return 0;
44#endif
45}
46unsigned PPC64TargetMachine::getJITMatchQuality() {
47#if defined(__POWERPC__) || defined (__ppc__) || defined(_POWER)
48  if (sizeof(void*) == 8)
49    return 10 * 0/*FIXME: not PPC64-JIT support yet! */;
50#endif
51  return 0;
52}
53
54unsigned PPC32TargetMachine::getModuleMatchQuality(const Module &M) {
55  // We strongly match "powerpc-*".
56  std::string TT = M.getTargetTriple();
57  if (TT.size() >= 8 && std::string(TT.begin(), TT.begin()+8) == "powerpc-")
58    return 20;
59
60  if (M.getEndianness()  == Module::BigEndian &&
61      M.getPointerSize() == Module::Pointer32)
62    return 10;                                   // Weak match
63  else if (M.getEndianness() != Module::AnyEndianness ||
64           M.getPointerSize() != Module::AnyPointerSize)
65    return 0;                                    // Match for some other target
66
67  return getJITMatchQuality()/2;
68}
69
70unsigned PPC64TargetMachine::getModuleMatchQuality(const Module &M) {
71  // We strongly match "powerpc64-*".
72  std::string TT = M.getTargetTriple();
73  if (TT.size() >= 10 && std::string(TT.begin(), TT.begin()+10) == "powerpc64-")
74    return 20;
75
76  if (M.getEndianness()  == Module::BigEndian &&
77      M.getPointerSize() == Module::Pointer64)
78    return 10;                                   // Weak match
79  else if (M.getEndianness() != Module::AnyEndianness ||
80           M.getPointerSize() != Module::AnyPointerSize)
81    return 0;                                    // Match for some other target
82
83  return getJITMatchQuality()/2;
84}
85
86
87PPCTargetMachine::PPCTargetMachine(const Module &M, const std::string &FS,
88                                   bool is64Bit)
89  : TargetMachine("PowerPC"), Subtarget(M, FS, is64Bit),
90    DataLayout(Subtarget.getTargetDataString()),
91    FrameInfo(*this, false), JITInfo(*this), TLInfo(*this),
92    InstrItins(Subtarget.getInstrItineraryData()) {
93
94  if (getRelocationModel() == Reloc::Default)
95    if (Subtarget.isDarwin())
96      setRelocationModel(Reloc::DynamicNoPIC);
97    else
98      setRelocationModel(Reloc::PIC);
99}
100
101PPC32TargetMachine::PPC32TargetMachine(const Module &M, const std::string &FS)
102  : PPCTargetMachine(M, FS, false) {
103}
104
105
106PPC64TargetMachine::PPC64TargetMachine(const Module &M, const std::string &FS)
107  : PPCTargetMachine(M, FS, true) {
108}
109
110/// addPassesToEmitFile - Add passes to the specified pass manager to implement
111/// a static compiler for this target.
112///
113bool PPCTargetMachine::addPassesToEmitFile(PassManager &PM,
114                                           std::ostream &Out,
115                                           CodeGenFileType FileType,
116                                           bool Fast) {
117  if (FileType != TargetMachine::AssemblyFile) return true;
118
119  // Run loop strength reduction before anything else.
120  if (!Fast) PM.add(createLoopStrengthReducePass(&TLInfo));
121
122  // FIXME: Implement efficient support for garbage collection intrinsics.
123  PM.add(createLowerGCPass());
124
125  // FIXME: Implement the invoke/unwind instructions!
126  PM.add(createLowerInvokePass());
127
128  // Clean up after other passes, e.g. merging critical edges.
129  if (!Fast) PM.add(createCFGSimplificationPass());
130
131  // Make sure that no unreachable blocks are instruction selected.
132  PM.add(createUnreachableBlockEliminationPass());
133
134  // Install an instruction selector.
135  PM.add(createPPCISelDag(*this));
136
137  if (PrintMachineCode)
138    PM.add(createMachineFunctionPrinterPass(&std::cerr));
139
140  PM.add(createRegisterAllocator());
141
142  if (PrintMachineCode)
143    PM.add(createMachineFunctionPrinterPass(&std::cerr));
144
145  PM.add(createPrologEpilogCodeInserter());
146
147  // Must run branch selection immediately preceding the asm printer
148  PM.add(createPPCBranchSelectionPass());
149
150  // Decide which asm printer to use.  If the user has not specified one on
151  // the command line, choose whichever one matches the default (current host).
152  if (Subtarget.isAIX())
153    PM.add(createAIXAsmPrinter(Out, *this));
154  else
155    PM.add(createDarwinAsmPrinter(Out, *this));
156
157  PM.add(createMachineCodeDeleter());
158  return false;
159}
160
161void PPCJITInfo::addPassesToJITCompile(FunctionPassManager &PM) {
162  // The JIT should use the static relocation model.
163  TM.setRelocationModel(Reloc::Static);
164
165  // Run loop strength reduction before anything else.
166  PM.add(createLoopStrengthReducePass(TM.getTargetLowering()));
167
168  // FIXME: Implement efficient support for garbage collection intrinsics.
169  PM.add(createLowerGCPass());
170
171  // FIXME: Implement the invoke/unwind instructions!
172  PM.add(createLowerInvokePass());
173
174  // Clean up after other passes, e.g. merging critical edges.
175  PM.add(createCFGSimplificationPass());
176
177  // Make sure that no unreachable blocks are instruction selected.
178  PM.add(createUnreachableBlockEliminationPass());
179
180  // Install an instruction selector.
181  PM.add(createPPCISelDag(TM));
182
183  PM.add(createRegisterAllocator());
184  PM.add(createPrologEpilogCodeInserter());
185
186  // Must run branch selection immediately preceding the asm printer
187  PM.add(createPPCBranchSelectionPass());
188
189  if (PrintMachineCode)
190    PM.add(createMachineFunctionPrinterPass(&std::cerr));
191}
192
193