SparcTargetMachine.cpp revision 0d170a7969e7e36ad00afe596f2937f0c74d2b49 
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 "llvm/Support/CommandLine.h"
24#include <iostream>
25using namespace llvm;
26
27namespace {
28  // Register the target.
29  RegisterTarget<SparcV8TargetMachine> X("sparcv8","  SPARC V8 (experimental)");
30}
31
32/// SparcV8TargetMachine ctor - Create an ILP32 architecture model
33///
34SparcV8TargetMachine::SparcV8TargetMachine(const Module &M,
35                                           IntrinsicLowering *IL,
36                                           const std::string &FS)
37  : TargetMachine("SparcV8", IL, false, 4, 4),
38    Subtarget(M, FS),
39    FrameInfo(TargetFrameInfo::StackGrowsDown, 8, 0) {
40}
41
42unsigned SparcV8TargetMachine::getModuleMatchQuality(const Module &M) {
43  std::string TT = M.getTargetTriple();
44  if (TT.size() >= 6 && std::string(TT.begin(), TT.begin()+6) == "sparc-")
45    return 20;
46
47  if (M.getEndianness()  == Module::BigEndian &&
48      M.getPointerSize() == Module::Pointer32)
49#ifdef __sparc__
50    return 20;   // BE/32 ==> Prefer sparcv8 on sparc
51#else
52    return 5;    // BE/32 ==> Prefer ppc elsewhere
53#endif
54  else if (M.getEndianness() != Module::AnyEndianness ||
55           M.getPointerSize() != Module::AnyPointerSize)
56    return 0;                                    // Match for some other target
57
58  return 0;
59}
60
61/// addPassesToEmitFile - Add passes to the specified pass manager
62/// to implement a static compiler for this target.
63///
64bool SparcV8TargetMachine::addPassesToEmitFile(PassManager &PM,
65                                               std::ostream &Out,
66                                               CodeGenFileType FileType,
67                                               bool Fast) {
68  if (FileType != TargetMachine::AssemblyFile) return true;
69
70  // FIXME: Implement efficient support for garbage collection intrinsics.
71  PM.add(createLowerGCPass());
72
73  // FIXME: implement the invoke/unwind instructions!
74  PM.add(createLowerInvokePass());
75
76  // FIXME: implement the switch instruction in the instruction selector.
77  PM.add(createLowerSwitchPass());
78
79  // Print LLVM code input to instruction selector:
80  if (PrintMachineCode)
81    PM.add(new PrintFunctionPass());
82
83  // Make sure that no unreachable blocks are instruction selected.
84  PM.add(createUnreachableBlockEliminationPass());
85
86  PM.add(createSparcV8ISelDag(*this));
87
88  // Print machine instructions as they were initially generated.
89  if (PrintMachineCode)
90    PM.add(createMachineFunctionPrinterPass(&std::cerr));
91
92  PM.add(createRegisterAllocator());
93  PM.add(createPrologEpilogCodeInserter());
94
95  // Print machine instructions after register allocation and prolog/epilog
96  // insertion.
97  if (PrintMachineCode)
98    PM.add(createMachineFunctionPrinterPass(&std::cerr));
99
100  PM.add(createSparcV8FPMoverPass(*this));
101
102  PM.add(createSparcV8DelaySlotFillerPass(*this));
103
104  // Print machine instructions after filling delay slots.
105  if (PrintMachineCode)
106    PM.add(createMachineFunctionPrinterPass(&std::cerr));
107
108  // Output assembly language.
109  PM.add(createSparcV8CodePrinterPass(Out, *this));
110
111  // Delete the MachineInstrs we generated, since they're no longer needed.
112  PM.add(createMachineCodeDeleter());
113  return false;
114}
115
116