1 //===-- MipsTargetMachine.cpp - Define TargetMachine for Mips -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Implements the info about Mips target spec.
12 //===----------------------------------------------------------------------===//
15 #include "MipsTargetAsmInfo.h"
16 #include "MipsTargetMachine.h"
17 #include "llvm/Module.h"
18 #include "llvm/PassManager.h"
19 #include "llvm/Target/TargetMachineRegistry.h"
22 /// MipsTargetMachineModule - Note that this is used on hosts that
23 /// cannot link in a library unless there are references into the
24 /// library. In particular, it seems that it is not possible to get
25 /// things to work on Win32 without this. Though it is unused, do not
27 extern "C" int MipsTargetMachineModule;
28 int MipsTargetMachineModule = 0;
30 // Register the target.
31 extern Target TheMipsTarget;
32 static RegisterTarget<MipsTargetMachine> X(TheMipsTarget, "mips", "Mips");
34 extern Target TheMipselTarget;
35 static RegisterTarget<MipselTargetMachine> Y(TheMipselTarget, "mipsel",
38 // Force static initialization.
39 extern "C" void LLVMInitializeMipsTarget() { }
41 const TargetAsmInfo *MipsTargetMachine::
42 createTargetAsmInfo() const
44 return new MipsTargetAsmInfo(*this);
47 // DataLayout --> Big-endian, 32-bit pointer/ABI/alignment
48 // The stack is always 8 byte aligned
49 // On function prologue, the stack is created by decrementing
50 // its pointer. Once decremented, all references are done with positive
51 // offset from the stack/frame pointer, using StackGrowsUp enables
52 // an easier handling.
53 // Using CodeModel::Large enables different CALL behavior.
55 MipsTargetMachine(const Target &T, const Module &M, const std::string &FS,
58 Subtarget(*this, M, FS, isLittle),
59 DataLayout(isLittle ? std::string("e-p:32:32:32-i8:8:32-i16:16:32") :
60 std::string("E-p:32:32:32-i8:8:32-i16:16:32")),
62 FrameInfo(TargetFrameInfo::StackGrowsUp, 8, 0),
65 // Abicall enables PIC by default
66 if (Subtarget.hasABICall())
67 setRelocationModel(Reloc::PIC_);
69 // TODO: create an option to enable long calls, like -mlong-calls,
70 // that would be our CodeModel::Large. It must not work with Abicall.
71 if (getCodeModel() == CodeModel::Default)
72 setCodeModel(CodeModel::Small);
76 MipselTargetMachine(const Target &T, const Module &M, const std::string &FS) :
77 MipsTargetMachine(T, M, FS, true) {}
79 // Install an instruction selector pass using
80 // the ISelDag to gen Mips code.
81 bool MipsTargetMachine::
82 addInstSelector(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
84 PM.add(createMipsISelDag(*this));
88 // Implemented by targets that want to run passes immediately before
89 // machine code is emitted. return true if -print-machineinstrs should
90 // print out the code after the passes.
91 bool MipsTargetMachine::
92 addPreEmitPass(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
94 PM.add(createMipsDelaySlotFillerPass(*this));