SparcTargetMachine.cpp revision 7c90f73a1b06040d971a3dd95a491031ae6238d5 
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 "llvm/Support/CommandLine.h"
24#include <iostream>
25using namespace llvm;
26
27namespace {
28  // Register the target.
29  RegisterTarget<SparcTargetMachine> X("sparc", "  SPARC");
30}
31
32/// SparcTargetMachine ctor - Create an ILP32 architecture model
33///
34SparcTargetMachine::SparcTargetMachine(const Module &M, IntrinsicLowering *IL,
35                                       const std::string &FS)
36  : TargetMachine("Sparc", IL, false, 4, 4),
37    Subtarget(M, FS), InstrInfo(Subtarget),
38    FrameInfo(TargetFrameInfo::StackGrowsDown, 8, 0) {
39}
40
41unsigned SparcTargetMachine::getModuleMatchQuality(const Module &M) {
42  std::string TT = M.getTargetTriple();
43  if (TT.size() >= 6 && std::string(TT.begin(), TT.begin()+6) == "sparc-")
44    return 20;
45
46  if (M.getEndianness()  == Module::BigEndian &&
47      M.getPointerSize() == Module::Pointer32)
48#ifdef __sparc__
49    return 20;   // BE/32 ==> Prefer sparc on sparc
50#else
51    return 5;    // BE/32 ==> Prefer ppc elsewhere
52#endif
53  else if (M.getEndianness() != Module::AnyEndianness ||
54           M.getPointerSize() != Module::AnyPointerSize)
55    return 0;                                    // Match for some other target
56
57  return 0;
58}
59
60/// addPassesToEmitFile - Add passes to the specified pass manager
61/// to implement a static compiler for this target.
62///
63bool SparcTargetMachine::addPassesToEmitFile(PassManager &PM, 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  // FIXME: implement the invoke/unwind instructions!
72  PM.add(createLowerInvokePass());
73
74  // FIXME: implement the switch instruction in the instruction selector.
75  PM.add(createLowerSwitchPass());
76
77  // Print LLVM code input to instruction selector:
78  if (PrintMachineCode)
79    PM.add(new PrintFunctionPass());
80
81  // Make sure that no unreachable blocks are instruction selected.
82  PM.add(createUnreachableBlockEliminationPass());
83
84  PM.add(createSparcISelDag(*this));
85
86  // Print machine instructions as they were initially generated.
87  if (PrintMachineCode)
88    PM.add(createMachineFunctionPrinterPass(&std::cerr));
89
90  PM.add(createRegisterAllocator());
91  PM.add(createPrologEpilogCodeInserter());
92
93  // Print machine instructions after register allocation and prolog/epilog
94  // insertion.
95  if (PrintMachineCode)
96    PM.add(createMachineFunctionPrinterPass(&std::cerr));
97
98  PM.add(createSparcFPMoverPass(*this));
99
100  PM.add(createSparcDelaySlotFillerPass(*this));
101
102  // Print machine instructions after filling delay slots.
103  if (PrintMachineCode)
104    PM.add(createMachineFunctionPrinterPass(&std::cerr));
105
106  // Output assembly language.
107  PM.add(createSparcCodePrinterPass(Out, *this));
108
109  // Delete the MachineInstrs we generated, since they're no longer needed.
110  PM.add(createMachineCodeDeleter());
111  return false;
112}
113
114