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 "MipsMCAsmInfo.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 RegisterTargetMachine<MipsTargetMachine> X(TheMipsTarget);
24 RegisterTargetMachine<MipselTargetMachine> Y(TheMipselTarget);
25 RegisterAsmInfo<MipsMCAsmInfo> A(TheMipsTarget);
26 RegisterAsmInfo<MipsMCAsmInfo> B(TheMipselTarget);
29 // DataLayout --> Big-endian, 32-bit pointer/ABI/alignment
30 // The stack is always 8 byte aligned
31 // On function prologue, the stack is created by decrementing
32 // its pointer. Once decremented, all references are done with positive
33 // offset from the stack/frame pointer, using StackGrowsUp enables
34 // an easier handling.
35 // Using CodeModel::Large enables different CALL behavior.
37 MipsTargetMachine(const Target &T, const std::string &TT, const std::string &FS,
39 LLVMTargetMachine(T, TT),
40 Subtarget(TT, FS, isLittle),
42 std::string("e-p:32:32:32-i8:8:32-i16:16:32-i64:64:64-n32") :
43 std::string("E-p:32:32:32-i8:8:32-i16:16:32-i64:64:64-n32")),
45 FrameLowering(Subtarget),
46 TLInfo(*this), TSInfo(*this) {
47 // Abicall enables PIC by default
48 if (getRelocationModel() == Reloc::Default) {
49 if (Subtarget.isABI_O32())
50 setRelocationModel(Reloc::PIC_);
52 setRelocationModel(Reloc::Static);
57 MipselTargetMachine(const Target &T, const std::string &TT,
58 const std::string &FS) :
59 MipsTargetMachine(T, TT, FS, true) {}
61 // Install an instruction selector pass using
62 // the ISelDag to gen Mips code.
63 bool MipsTargetMachine::
64 addInstSelector(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
66 PM.add(createMipsISelDag(*this));
70 // Implemented by targets that want to run passes immediately before
71 // machine code is emitted. return true if -print-machineinstrs should
72 // print out the code after the passes.
73 bool MipsTargetMachine::
74 addPreEmitPass(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
76 PM.add(createMipsDelaySlotFillerPass(*this));
80 bool MipsTargetMachine::
81 addPreRegAlloc(PassManagerBase &PM, CodeGenOpt::Level OptLevel) {
82 PM.add(createMipsEmitGPRestorePass(*this));
86 bool MipsTargetMachine::
87 addPostRegAlloc(PassManagerBase &PM, CodeGenOpt::Level OptLevel) {
88 PM.add(createMipsExpandPseudoPass(*this));