1 //===-- MBlazeTargetMachine.cpp - Define TargetMachine for MBlaze ---------===//
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 MBlaze target spec.
12 //===----------------------------------------------------------------------===//
14 #include "MBlazeTargetMachine.h"
16 #include "llvm/CodeGen/Passes.h"
17 #include "llvm/PassManager.h"
18 #include "llvm/Support/FormattedStream.h"
19 #include "llvm/Support/TargetRegistry.h"
20 #include "llvm/Target/TargetOptions.h"
23 extern "C" void LLVMInitializeMBlazeTarget() {
24 // Register the target.
25 RegisterTargetMachine<MBlazeTargetMachine> X(TheMBlazeTarget);
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.
35 MBlazeTargetMachine(const Target &T, StringRef TT,
36 StringRef CPU, StringRef FS, const TargetOptions &Options,
37 Reloc::Model RM, CodeModel::Model CM,
39 : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
40 Subtarget(TT, CPU, FS),
41 DL("E-p:32:32:32-i8:8:8-i16:16:16"),
43 FrameLowering(Subtarget),
44 TLInfo(*this), TSInfo(*this),
45 InstrItins(Subtarget.getInstrItineraryData()),
46 STTI(&TLInfo), VTTI(&TLInfo) {
50 /// MBlaze Code Generator Pass Configuration Options.
51 class MBlazePassConfig : public TargetPassConfig {
53 MBlazePassConfig(MBlazeTargetMachine *TM, PassManagerBase &PM)
54 : TargetPassConfig(TM, PM) {}
56 MBlazeTargetMachine &getMBlazeTargetMachine() const {
57 return getTM<MBlazeTargetMachine>();
60 virtual bool addInstSelector();
61 virtual bool addPreEmitPass();
65 TargetPassConfig *MBlazeTargetMachine::createPassConfig(PassManagerBase &PM) {
66 return new MBlazePassConfig(this, PM);
69 // Install an instruction selector pass using
70 // the ISelDag to gen MBlaze code.
71 bool MBlazePassConfig::addInstSelector() {
72 addPass(createMBlazeISelDag(getMBlazeTargetMachine()));
76 // Implemented by targets that want to run passes immediately before
77 // machine code is emitted. return true if -print-machineinstrs should
78 // print out the code after the passes.
79 bool MBlazePassConfig::addPreEmitPass() {
80 addPass(createMBlazeDelaySlotFillerPass(getMBlazeTargetMachine()));