1 //===-- 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 "MBlazeTargetMachine.h"
16 #include "llvm/PassManager.h"
17 #include "llvm/CodeGen/Passes.h"
18 #include "llvm/Support/FormattedStream.h"
19 #include "llvm/Support/TargetRegistry.h"
20 #include "llvm/Target/TargetOptions.h"
21 using namespace llvm;
22
LLVMInitializeMBlazeTarget()23 extern "C" void LLVMInitializeMBlazeTarget() {
24 // Register the target.
25 RegisterTargetMachine<MBlazeTargetMachine> X(TheMBlazeTarget);
26 }
27
28 // DataLayout --> Big-endian, 32-bit pointer/ABI/alignment
29 // The stack is always 8 byte aligned
30 // On function prologue, the stack is created by decrementing
31 // its pointer. Once decremented, all references are done with positive
32 // offset from the stack/frame pointer, using StackGrowsUp enables
33 // an easier handling.
34 MBlazeTargetMachine::
MBlazeTargetMachine(const Target & T,StringRef TT,StringRef CPU,StringRef FS,Reloc::Model RM,CodeModel::Model CM)35 MBlazeTargetMachine(const Target &T, StringRef TT,
36 StringRef CPU, StringRef FS,
37 Reloc::Model RM, CodeModel::Model CM):
38 LLVMTargetMachine(T, TT, CPU, FS, RM, CM),
39 Subtarget(TT, CPU, FS),
40 DataLayout("E-p:32:32:32-i8:8:8-i16:16:16"),
41 InstrInfo(*this),
42 FrameLowering(Subtarget),
43 TLInfo(*this), TSInfo(*this), ELFWriterInfo(*this),
44 InstrItins(Subtarget.getInstrItineraryData()) {
45 }
46
47 // Install an instruction selector pass using
48 // the ISelDag to gen MBlaze code.
addInstSelector(PassManagerBase & PM,CodeGenOpt::Level OptLevel)49 bool MBlazeTargetMachine::addInstSelector(PassManagerBase &PM,
50 CodeGenOpt::Level OptLevel) {
51 PM.add(createMBlazeISelDag(*this));
52 return false;
53 }
54
55 // Implemented by targets that want to run passes immediately before
56 // machine code is emitted. return true if -print-machineinstrs should
57 // print out the code after the passes.
addPreEmitPass(PassManagerBase & PM,CodeGenOpt::Level OptLevel)58 bool MBlazeTargetMachine::addPreEmitPass(PassManagerBase &PM,
59 CodeGenOpt::Level OptLevel) {
60 PM.add(createMBlazeDelaySlotFillerPass(*this));
61 return true;
62 }
63