SparcTargetMachine.cpp revision 03a83c90da38a3a3cf14f2003c730f0764e7b9cf 
1//===-- SparcV8TargetMachine.cpp - Define TargetMachine for SparcV8 -------===//
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//
11//===----------------------------------------------------------------------===//
12
13#include "SparcV8TargetMachine.h"
14#include "SparcV8.h"
15#include "llvm/Assembly/PrintModulePass.h"
16#include "llvm/Module.h"
17#include "llvm/PassManager.h"
18#include "llvm/CodeGen/MachineFunction.h"
19#include "llvm/CodeGen/Passes.h"
20#include "llvm/Target/TargetOptions.h"
21#include "llvm/Target/TargetMachineRegistry.h"
22#include "llvm/Transforms/Scalar.h"
23#include <iostream>
24using namespace llvm;
25
26namespace {
27  // Register the target.
28  RegisterTarget<SparcV8TargetMachine> X("sparcv8","  SPARC V8 (experimental)");
29}
30
31/// SparcV8TargetMachine ctor - Create an ILP32 architecture model
32///
33SparcV8TargetMachine::SparcV8TargetMachine(const Module &M,
34                                           IntrinsicLowering *IL,
35                                           const std::string &FS)
36  : TargetMachine("SparcV8", IL, false, 4, 4),
37    FrameInfo(TargetFrameInfo::StackGrowsDown, 8, 0) {
38}
39
40unsigned SparcV8TargetMachine::getModuleMatchQuality(const Module &M) {
41  std::string TT = M.getTargetTriple();
42  if (TT.size() >= 6 && std::string(TT.begin(), TT.begin()+6) == "sparc-")
43    return 20;
44
45  if (M.getEndianness()  == Module::BigEndian &&
46      M.getPointerSize() == Module::Pointer32)
47#ifdef __sparc__
48    return 20;   // BE/32 ==> Prefer sparcv8 on sparc
49#else
50    return 5;    // BE/32 ==> Prefer ppc elsewhere
51#endif
52  else if (M.getEndianness() != Module::AnyEndianness ||
53           M.getPointerSize() != Module::AnyPointerSize)
54    return 0;                                    // Match for some other target
55
56  return 0;
57}
58
59/// addPassesToEmitFile - Add passes to the specified pass manager
60/// to implement a static compiler for this target.
61///
62bool SparcV8TargetMachine::addPassesToEmitFile(PassManager &PM,
63                                               std::ostream &Out,
64                                               CodeGenFileType FileType,
65                                               bool Fast) {
66  if (FileType != TargetMachine::AssemblyFile) return true;
67
68  // FIXME: Implement efficient support for garbage collection intrinsics.
69  PM.add(createLowerGCPass());
70
71  // Replace malloc and free instructions with library calls.
72  PM.add(createLowerAllocationsPass());
73
74  // FIXME: implement the switch instruction in the instruction selector.
75  PM.add(createLowerSwitchPass());
76
77  // FIXME: implement the invoke/unwind instructions!
78  PM.add(createLowerInvokePass());
79
80  // Make sure that no unreachable blocks are instruction selected.
81  PM.add(createUnreachableBlockEliminationPass());
82
83  // FIXME: implement the select instruction in the instruction selector.
84  PM.add(createLowerSelectPass());
85
86  // Print LLVM code input to instruction selector:
87  if (PrintMachineCode)
88    PM.add(new PrintFunctionPass());
89
90  PM.add(createSparcV8SimpleInstructionSelector(*this));
91
92  // Print machine instructions as they were initially generated.
93  if (PrintMachineCode)
94    PM.add(createMachineFunctionPrinterPass(&std::cerr));
95
96  PM.add(createRegisterAllocator());
97  PM.add(createPrologEpilogCodeInserter());
98
99  // Print machine instructions after register allocation and prolog/epilog
100  // insertion.
101  if (PrintMachineCode)
102    PM.add(createMachineFunctionPrinterPass(&std::cerr));
103
104  PM.add(createSparcV8FPMoverPass(*this));
105  PM.add(createSparcV8DelaySlotFillerPass(*this));
106
107  // Print machine instructions after filling delay slots.
108  if (PrintMachineCode)
109    PM.add(createMachineFunctionPrinterPass(&std::cerr));
110
111  // Output assembly language.
112  PM.add(createSparcV8CodePrinterPass(Out, *this));
113
114  // Delete the MachineInstrs we generated, since they're no longer needed.
115  PM.add(createMachineCodeDeleter());
116  return false;
117}
118
119