1 //===-- NVPTXTargetMachine.cpp - Define TargetMachine for NVPTX -----------===//
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 // Top-level implementation for the NVPTX target.
12 //===----------------------------------------------------------------------===//
14 #include "NVPTXTargetMachine.h"
15 #include "MCTargetDesc/NVPTXMCAsmInfo.h"
17 #include "NVPTXAllocaHoisting.h"
18 #include "NVPTXLowerAggrCopies.h"
19 #include "llvm/ADT/OwningPtr.h"
20 #include "llvm/Analysis/Passes.h"
21 #include "llvm/CodeGen/AsmPrinter.h"
22 #include "llvm/CodeGen/MachineFunctionAnalysis.h"
23 #include "llvm/CodeGen/MachineModuleInfo.h"
24 #include "llvm/CodeGen/Passes.h"
25 #include "llvm/IR/DataLayout.h"
26 #include "llvm/IR/IRPrintingPasses.h"
27 #include "llvm/IR/Verifier.h"
28 #include "llvm/MC/MCAsmInfo.h"
29 #include "llvm/MC/MCInstrInfo.h"
30 #include "llvm/MC/MCStreamer.h"
31 #include "llvm/MC/MCSubtargetInfo.h"
32 #include "llvm/PassManager.h"
33 #include "llvm/Support/CommandLine.h"
34 #include "llvm/Support/Debug.h"
35 #include "llvm/Support/FormattedStream.h"
36 #include "llvm/Support/TargetRegistry.h"
37 #include "llvm/Support/raw_ostream.h"
38 #include "llvm/Target/TargetInstrInfo.h"
39 #include "llvm/Target/TargetLowering.h"
40 #include "llvm/Target/TargetLoweringObjectFile.h"
41 #include "llvm/Target/TargetMachine.h"
42 #include "llvm/Target/TargetOptions.h"
43 #include "llvm/Target/TargetRegisterInfo.h"
44 #include "llvm/Target/TargetSubtargetInfo.h"
45 #include "llvm/Transforms/Scalar.h"
50 void initializeNVVMReflectPass(PassRegistry&);
51 void initializeGenericToNVVMPass(PassRegistry&);
54 extern "C" void LLVMInitializeNVPTXTarget() {
55 // Register the target.
56 RegisterTargetMachine<NVPTXTargetMachine32> X(TheNVPTXTarget32);
57 RegisterTargetMachine<NVPTXTargetMachine64> Y(TheNVPTXTarget64);
59 // FIXME: This pass is really intended to be invoked during IR optimization,
60 // but it's very NVPTX-specific.
61 initializeNVVMReflectPass(*PassRegistry::getPassRegistry());
62 initializeGenericToNVVMPass(*PassRegistry::getPassRegistry());
65 static std::string computeDataLayout(const NVPTXSubtarget &ST) {
66 std::string Ret = "e";
71 Ret += "-i64:64-v16:16-v32:32-n16:32:64";
76 NVPTXTargetMachine::NVPTXTargetMachine(
77 const Target &T, StringRef TT, StringRef CPU, StringRef FS,
78 const TargetOptions &Options, Reloc::Model RM, CodeModel::Model CM,
79 CodeGenOpt::Level OL, bool is64bit)
80 : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
81 Subtarget(TT, CPU, FS, is64bit), DL(computeDataLayout(Subtarget)),
82 InstrInfo(*this), TLInfo(*this), TSInfo(*this),
84 *this, is64bit) /*FrameInfo(TargetFrameInfo::StackGrowsUp, 8, 0)*/ {
88 void NVPTXTargetMachine32::anchor() {}
90 NVPTXTargetMachine32::NVPTXTargetMachine32(
91 const Target &T, StringRef TT, StringRef CPU, StringRef FS,
92 const TargetOptions &Options, Reloc::Model RM, CodeModel::Model CM,
94 : NVPTXTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, false) {}
96 void NVPTXTargetMachine64::anchor() {}
98 NVPTXTargetMachine64::NVPTXTargetMachine64(
99 const Target &T, StringRef TT, StringRef CPU, StringRef FS,
100 const TargetOptions &Options, Reloc::Model RM, CodeModel::Model CM,
101 CodeGenOpt::Level OL)
102 : NVPTXTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, true) {}
105 class NVPTXPassConfig : public TargetPassConfig {
107 NVPTXPassConfig(NVPTXTargetMachine *TM, PassManagerBase &PM)
108 : TargetPassConfig(TM, PM) {}
110 NVPTXTargetMachine &getNVPTXTargetMachine() const {
111 return getTM<NVPTXTargetMachine>();
114 virtual void addIRPasses();
115 virtual bool addInstSelector();
116 virtual bool addPreRegAlloc();
117 virtual bool addPostRegAlloc();
119 virtual FunctionPass *createTargetRegisterAllocator(bool) override;
120 virtual void addFastRegAlloc(FunctionPass *RegAllocPass);
121 virtual void addOptimizedRegAlloc(FunctionPass *RegAllocPass);
123 } // end anonymous namespace
125 TargetPassConfig *NVPTXTargetMachine::createPassConfig(PassManagerBase &PM) {
126 NVPTXPassConfig *PassConfig = new NVPTXPassConfig(this, PM);
130 void NVPTXPassConfig::addIRPasses() {
131 // The following passes are known to not play well with virtual regs hanging
132 // around after register allocation (which in our case, is *all* registers).
133 // We explicitly disable them here. We do, however, need some functionality
134 // of the PrologEpilogCodeInserter pass, so we emulate that behavior in the
135 // NVPTXPrologEpilog pass (see NVPTXPrologEpilogPass.cpp).
136 disablePass(&PrologEpilogCodeInserterID);
137 disablePass(&MachineCopyPropagationID);
138 disablePass(&BranchFolderPassID);
139 disablePass(&TailDuplicateID);
141 TargetPassConfig::addIRPasses();
142 addPass(createGenericToNVVMPass());
145 bool NVPTXPassConfig::addInstSelector() {
146 addPass(createLowerAggrCopies());
147 addPass(createAllocaHoisting());
148 addPass(createNVPTXISelDag(getNVPTXTargetMachine(), getOptLevel()));
152 bool NVPTXPassConfig::addPreRegAlloc() { return false; }
153 bool NVPTXPassConfig::addPostRegAlloc() {
154 addPass(createNVPTXPrologEpilogPass());
158 FunctionPass *NVPTXPassConfig::createTargetRegisterAllocator(bool) {
159 return 0; // No reg alloc
162 void NVPTXPassConfig::addFastRegAlloc(FunctionPass *RegAllocPass) {
163 assert(!RegAllocPass && "NVPTX uses no regalloc!");
164 addPass(&PHIEliminationID);
165 addPass(&TwoAddressInstructionPassID);
168 void NVPTXPassConfig::addOptimizedRegAlloc(FunctionPass *RegAllocPass) {
169 assert(!RegAllocPass && "NVPTX uses no regalloc!");
171 addPass(&ProcessImplicitDefsID);
172 addPass(&LiveVariablesID);
173 addPass(&MachineLoopInfoID);
174 addPass(&PHIEliminationID);
176 addPass(&TwoAddressInstructionPassID);
177 addPass(&RegisterCoalescerID);
179 // PreRA instruction scheduling.
180 if (addPass(&MachineSchedulerID))
181 printAndVerify("After Machine Scheduling");
184 addPass(&StackSlotColoringID);
186 // FIXME: Needs physical registers
187 //addPass(&PostRAMachineLICMID);
189 printAndVerify("After StackSlotColoring");