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