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 "MipsTargetMachine.h"
16 #include "llvm/PassManager.h"
17 #include "llvm/Target/TargetRegistry.h"
20 extern "C" void LLVMInitializeMipsTarget() {
21 // Register the target.
22 RegisterTargetMachine<MipsTargetMachine> X(TheMipsTarget);
23 RegisterTargetMachine<MipselTargetMachine> Y(TheMipselTarget);
26 // DataLayout --> Big-endian, 32-bit pointer/ABI/alignment
27 // The stack is always 8 byte aligned
28 // On function prologue, the stack is created by decrementing
29 // its pointer. Once decremented, all references are done with positive
30 // offset from the stack/frame pointer, using StackGrowsUp enables
31 // an easier handling.
32 // Using CodeModel::Large enables different CALL behavior.
34 MipsTargetMachine(const Target &T, const std::string &TT,
35 const std::string &CPU, const std::string &FS,
37 LLVMTargetMachine(T, TT, CPU, FS),
38 Subtarget(TT, CPU, FS, isLittle),
40 std::string("e-p:32:32:32-i8:8:32-i16:16:32-i64:64:64-n32") :
41 std::string("E-p:32:32:32-i8:8:32-i16:16:32-i64:64:64-n32")),
43 FrameLowering(Subtarget),
44 TLInfo(*this), TSInfo(*this) {
45 // Abicall enables PIC by default
46 if (getRelocationModel() == Reloc::Default) {
47 if (Subtarget.isABI_O32())
48 setRelocationModel(Reloc::PIC_);
50 setRelocationModel(Reloc::Static);
55 MipselTargetMachine(const Target &T, const std::string &TT,
56 const std::string &CPU, const std::string &FS) :
57 MipsTargetMachine(T, TT, CPU, FS, true) {}
59 // Install an instruction selector pass using
60 // the ISelDag to gen Mips code.
61 bool MipsTargetMachine::
62 addInstSelector(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
64 PM.add(createMipsISelDag(*this));
68 // Implemented by targets that want to run passes immediately before
69 // machine code is emitted. return true if -print-machineinstrs should
70 // print out the code after the passes.
71 bool MipsTargetMachine::
72 addPreEmitPass(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
74 PM.add(createMipsDelaySlotFillerPass(*this));
78 bool MipsTargetMachine::
79 addPreRegAlloc(PassManagerBase &PM, CodeGenOpt::Level OptLevel) {
80 PM.add(createMipsEmitGPRestorePass(*this));
84 bool MipsTargetMachine::
85 addPostRegAlloc(PassManagerBase &PM, CodeGenOpt::Level OptLevel) {
86 PM.add(createMipsExpandPseudoPass(*this));