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Wesley Pecka70f28c2010-02-23 19:15:24 +00001//===-- MBlazeTargetMachine.cpp - Define TargetMachine for MBlaze ---------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// Implements the info about MBlaze target spec.
11//
12//===----------------------------------------------------------------------===//
13
14#include "MBlaze.h"
15#include "MBlazeMCAsmInfo.h"
16#include "MBlazeTargetMachine.h"
17#include "llvm/PassManager.h"
Wesley Peck4e9141f2010-10-21 03:57:26 +000018#include "llvm/CodeGen/Passes.h"
19#include "llvm/Support/FormattedStream.h"
20#include "llvm/Target/TargetOptions.h"
Wesley Pecka70f28c2010-02-23 19:15:24 +000021#include "llvm/Target/TargetRegistry.h"
22using namespace llvm;
23
Wesley Pecka0603832010-10-27 00:23:01 +000024static MCAsmInfo *createMCAsmInfo(const Target &T, StringRef TT) {
25 Triple TheTriple(TT);
26 switch (TheTriple.getOS()) {
27 default:
28 return new MBlazeMCAsmInfo();
29 }
30}
31
Wesley Peck4e9141f2010-10-21 03:57:26 +000032static MCStreamer *createMCStreamer(const Target &T, const std::string &TT,
33 MCContext &Ctx, TargetAsmBackend &TAB,
34 raw_ostream &_OS,
35 MCCodeEmitter *_Emitter,
Rafael Espindola96aa78c2011-01-23 17:55:27 +000036 bool RelaxAll,
37 bool NoExecStack) {
Wesley Peck4e9141f2010-10-21 03:57:26 +000038 Triple TheTriple(TT);
39 switch (TheTriple.getOS()) {
40 case Triple::Darwin:
41 llvm_unreachable("MBlaze does not support Darwin MACH-O format");
42 return NULL;
43 case Triple::MinGW32:
Wesley Peck4e9141f2010-10-21 03:57:26 +000044 case Triple::Cygwin:
45 case Triple::Win32:
Wesley Peck82dc0402010-11-24 15:39:32 +000046 llvm_unreachable("MBlaze does not support Windows COFF format");
Wesley Peck4e9141f2010-10-21 03:57:26 +000047 return NULL;
48 default:
Rafael Espindola96aa78c2011-01-23 17:55:27 +000049 return createELFStreamer(Ctx, TAB, _OS, _Emitter, RelaxAll,
50 NoExecStack);
Wesley Peck4e9141f2010-10-21 03:57:26 +000051 }
52}
53
54
Wesley Pecka70f28c2010-02-23 19:15:24 +000055extern "C" void LLVMInitializeMBlazeTarget() {
56 // Register the target.
57 RegisterTargetMachine<MBlazeTargetMachine> X(TheMBlazeTarget);
Wesley Pecka0603832010-10-27 00:23:01 +000058
59 // Register the target asm info.
60 RegisterAsmInfoFn A(TheMBlazeTarget, createMCAsmInfo);
Wesley Peck4e9141f2010-10-21 03:57:26 +000061
62 // Register the MC code emitter
63 TargetRegistry::RegisterCodeEmitter(TheMBlazeTarget,
64 llvm::createMBlazeMCCodeEmitter);
Wesley Peck0a67d922010-11-08 19:40:01 +000065
Wesley Peck4e9141f2010-10-21 03:57:26 +000066 // Register the asm backend
67 TargetRegistry::RegisterAsmBackend(TheMBlazeTarget,
68 createMBlazeAsmBackend);
69
70 // Register the object streamer
71 TargetRegistry::RegisterObjectStreamer(TheMBlazeTarget,
72 createMCStreamer);
73
Wesley Pecka70f28c2010-02-23 19:15:24 +000074}
75
76// DataLayout --> Big-endian, 32-bit pointer/ABI/alignment
77// The stack is always 8 byte aligned
78// On function prologue, the stack is created by decrementing
79// its pointer. Once decremented, all references are done with positive
80// offset from the stack/frame pointer, using StackGrowsUp enables
81// an easier handling.
82MBlazeTargetMachine::
83MBlazeTargetMachine(const Target &T, const std::string &TT,
84 const std::string &FS):
85 LLVMTargetMachine(T, TT),
86 Subtarget(TT, FS),
Wesley Peck4da992a2010-10-21 19:48:38 +000087 DataLayout("E-p:32:32:32-i8:8:8-i16:16:16"),
Wesley Pecka70f28c2010-02-23 19:15:24 +000088 InstrInfo(*this),
Anton Korobeynikov16c29b52011-01-10 12:39:04 +000089 FrameLowering(Subtarget),
Wesley Peck3d820ba2011-04-11 22:31:52 +000090 TLInfo(*this), TSInfo(*this), ELFWriterInfo(*this),
91 InstrItins(Subtarget.getInstrItineraryData()) {
Wesley Pecka70f28c2010-02-23 19:15:24 +000092 if (getRelocationModel() == Reloc::Default) {
93 setRelocationModel(Reloc::Static);
94 }
95
96 if (getCodeModel() == CodeModel::Default)
97 setCodeModel(CodeModel::Small);
98}
99
100// Install an instruction selector pass using
101// the ISelDag to gen MBlaze code.
Wesley Peck8397be02010-12-09 03:42:04 +0000102bool MBlazeTargetMachine::addInstSelector(PassManagerBase &PM,
103 CodeGenOpt::Level OptLevel) {
Wesley Pecka70f28c2010-02-23 19:15:24 +0000104 PM.add(createMBlazeISelDag(*this));
105 return false;
106}
107
108// Implemented by targets that want to run passes immediately before
109// machine code is emitted. return true if -print-machineinstrs should
110// print out the code after the passes.
Wesley Peck8397be02010-12-09 03:42:04 +0000111bool MBlazeTargetMachine::addPreEmitPass(PassManagerBase &PM,
112 CodeGenOpt::Level OptLevel) {
Wesley Pecka70f28c2010-02-23 19:15:24 +0000113 PM.add(createMBlazeDelaySlotFillerPass(*this));
114 return true;
115}