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