SparcTargetMachine.cpp revision c4fa386471cb1ff9d1f2acc24e2d0682e5a17b1b 
1//===-- SparcTargetMachine.cpp - Define TargetMachine for Sparc -----------===//
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 "SparcTargetMachine.h"
14#include "Sparc.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<SparcTargetMachine> X("sparc", "  SPARC");
29}
30
31/// SparcTargetMachine ctor - Create an ILP32 architecture model
32///
33SparcTargetMachine::SparcTargetMachine(const Module &M, const std::string &FS)
34  : DataLayout("E-p:32:32"),
35    Subtarget(M, FS), InstrInfo(Subtarget),
36    FrameInfo(TargetFrameInfo::StackGrowsDown, 8, 0) {
37}
38
39unsigned SparcTargetMachine::getModuleMatchQuality(const Module &M) {
40  std::string TT = M.getTargetTriple();
41  if (TT.size() >= 6 && std::string(TT.begin(), TT.begin()+6) == "sparc-")
42    return 20;
43
44  if (M.getEndianness()  == Module::BigEndian &&
45      M.getPointerSize() == Module::Pointer32)
46#ifdef __sparc__
47    return 20;   // BE/32 ==> Prefer sparc on sparc
48#else
49    return 5;    // BE/32 ==> Prefer ppc elsewhere
50#endif
51  else if (M.getEndianness() != Module::AnyEndianness ||
52           M.getPointerSize() != Module::AnyPointerSize)
53    return 0;                                    // Match for some other target
54
55  return 0;
56}
57
58/// addPassesToEmitFile - Add passes to the specified pass manager
59/// to implement a static compiler for this target.
60///
61bool SparcTargetMachine::addPassesToEmitFile(PassManager &PM, std::ostream &Out,
62                                             CodeGenFileType FileType,
63                                             bool Fast) {
64  if (FileType != TargetMachine::AssemblyFile) return true;
65
66  // Run loop strength reduction before anything else.
67  if (!Fast) PM.add(createLoopStrengthReducePass());
68
69  // FIXME: Implement efficient support for garbage collection intrinsics.
70  PM.add(createLowerGCPass());
71
72  // FIXME: implement the invoke/unwind instructions!
73  PM.add(createLowerInvokePass());
74
75  // Print LLVM code input to instruction selector:
76  if (PrintMachineCode)
77    PM.add(new PrintFunctionPass());
78
79  // Make sure that no unreachable blocks are instruction selected.
80  PM.add(createUnreachableBlockEliminationPass());
81
82  PM.add(createSparcISelDag(*this));
83
84  // Print machine instructions as they were initially generated.
85  if (PrintMachineCode)
86    PM.add(createMachineFunctionPrinterPass(&std::cerr));
87
88  PM.add(createRegisterAllocator());
89  PM.add(createPrologEpilogCodeInserter());
90
91  // Print machine instructions after register allocation and prolog/epilog
92  // insertion.
93  if (PrintMachineCode)
94    PM.add(createMachineFunctionPrinterPass(&std::cerr));
95
96  PM.add(createSparcFPMoverPass(*this));
97
98  PM.add(createSparcDelaySlotFillerPass(*this));
99
100  // Print machine instructions after filling delay slots.
101  if (PrintMachineCode)
102    PM.add(createMachineFunctionPrinterPass(&std::cerr));
103
104  // Output assembly language.
105  PM.add(createSparcCodePrinterPass(Out, *this));
106
107  // Delete the MachineInstrs we generated, since they're no longer needed.
108  PM.add(createMachineCodeDeleter());
109  return false;
110}
111
112