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 // Register the target.
23 static RegisterTarget<MipsTargetMachine> X(TheMipsTarget, "mips", "Mips");
25 static RegisterTarget<MipselTargetMachine> Y(TheMipselTarget, "mipsel",
28 // Force static initialization.
29 extern "C" void LLVMInitializeMipsTarget() { }
31 const TargetAsmInfo *MipsTargetMachine::
32 createTargetAsmInfo() const
34 return new MipsTargetAsmInfo(*this);
37 // DataLayout --> Big-endian, 32-bit pointer/ABI/alignment
38 // The stack is always 8 byte aligned
39 // On function prologue, the stack is created by decrementing
40 // its pointer. Once decremented, all references are done with positive
41 // offset from the stack/frame pointer, using StackGrowsUp enables
42 // an easier handling.
43 // Using CodeModel::Large enables different CALL behavior.
45 MipsTargetMachine(const Target &T, const Module &M, const std::string &FS,
48 Subtarget(*this, M, FS, isLittle),
49 DataLayout(isLittle ? std::string("e-p:32:32:32-i8:8:32-i16:16:32") :
50 std::string("E-p:32:32:32-i8:8:32-i16:16:32")),
52 FrameInfo(TargetFrameInfo::StackGrowsUp, 8, 0),
55 // Abicall enables PIC by default
56 if (Subtarget.hasABICall())
57 setRelocationModel(Reloc::PIC_);
59 // TODO: create an option to enable long calls, like -mlong-calls,
60 // that would be our CodeModel::Large. It must not work with Abicall.
61 if (getCodeModel() == CodeModel::Default)
62 setCodeModel(CodeModel::Small);
66 MipselTargetMachine(const Target &T, const Module &M, const std::string &FS) :
67 MipsTargetMachine(T, M, FS, true) {}
69 // Install an instruction selector pass using
70 // the ISelDag to gen Mips code.
71 bool MipsTargetMachine::
72 addInstSelector(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
74 PM.add(createMipsISelDag(*this));
78 // Implemented by targets that want to run passes immediately before
79 // machine code is emitted. return true if -print-machineinstrs should
80 // print out the code after the passes.
81 bool MipsTargetMachine::
82 addPreEmitPass(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
84 PM.add(createMipsDelaySlotFillerPass(*this));