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/PassManager.h"
18 #include "llvm/Target/TargetRegistry.h"
21 extern "C" void LLVMInitializeMipsTarget() {
22 // Register the target.
23 RegisterTargetMachineDeprecated<MipsTargetMachine> X(TheMipsTarget);
24 RegisterTargetMachineDeprecated<MipselTargetMachine> Y(TheMipselTarget);
27 const TargetAsmInfo *MipsTargetMachine::
28 createTargetAsmInfo() const
30 return new MipsTargetAsmInfo(*this);
33 // DataLayout --> Big-endian, 32-bit pointer/ABI/alignment
34 // The stack is always 8 byte aligned
35 // On function prologue, the stack is created by decrementing
36 // its pointer. Once decremented, all references are done with positive
37 // offset from the stack/frame pointer, using StackGrowsUp enables
38 // an easier handling.
39 // Using CodeModel::Large enables different CALL behavior.
41 MipsTargetMachine(const Target &T, const Module &M, const std::string &FS,
44 Subtarget(*this, M.getTargetTriple(), FS, isLittle),
45 DataLayout(isLittle ? std::string("e-p:32:32:32-i8:8:32-i16:16:32") :
46 std::string("E-p:32:32:32-i8:8:32-i16:16:32")),
48 FrameInfo(TargetFrameInfo::StackGrowsUp, 8, 0),
51 // Abicall enables PIC by default
52 if (Subtarget.hasABICall())
53 setRelocationModel(Reloc::PIC_);
55 // TODO: create an option to enable long calls, like -mlong-calls,
56 // that would be our CodeModel::Large. It must not work with Abicall.
57 if (getCodeModel() == CodeModel::Default)
58 setCodeModel(CodeModel::Small);
62 MipselTargetMachine(const Target &T, const Module &M, const std::string &FS) :
63 MipsTargetMachine(T, M, FS, true) {}
65 // Install an instruction selector pass using
66 // the ISelDag to gen Mips code.
67 bool MipsTargetMachine::
68 addInstSelector(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
70 PM.add(createMipsISelDag(*this));
74 // Implemented by targets that want to run passes immediately before
75 // machine code is emitted. return true if -print-machineinstrs should
76 // print out the code after the passes.
77 bool MipsTargetMachine::
78 addPreEmitPass(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
80 PM.add(createMipsDelaySlotFillerPass(*this));