1 //===-- HexagonTargetMachine.cpp - Define TargetMachine for Hexagon -------===//
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 Hexagon target spec.
12 //===----------------------------------------------------------------------===//
14 #include "HexagonTargetMachine.h"
16 #include "HexagonISelLowering.h"
17 #include "HexagonMachineScheduler.h"
18 #include "HexagonTargetObjectFile.h"
19 #include "llvm/CodeGen/Passes.h"
20 #include "llvm/IR/LegacyPassManager.h"
21 #include "llvm/IR/Module.h"
22 #include "llvm/Support/CommandLine.h"
23 #include "llvm/Support/TargetRegistry.h"
24 #include "llvm/Transforms/IPO/PassManagerBuilder.h"
25 #include "llvm/Transforms/Scalar.h"
29 static cl:: opt<bool> DisableHardwareLoops("disable-hexagon-hwloops",
30 cl::Hidden, cl::desc("Disable Hardware Loops for Hexagon target"));
32 static cl::opt<bool> DisableHexagonCFGOpt("disable-hexagon-cfgopt",
33 cl::Hidden, cl::ZeroOrMore, cl::init(false),
34 cl::desc("Disable Hexagon CFG Optimization"));
36 static cl::opt<bool> EnableExpandCondsets("hexagon-expand-condsets",
37 cl::init(true), cl::Hidden, cl::ZeroOrMore,
38 cl::desc("Early expansion of MUX"));
40 static cl::opt<bool> EnableGenInsert("hexagon-insert", cl::init(true),
41 cl::Hidden, cl::desc("Generate \"insert\" instructions"));
43 static cl::opt<bool> EnableCommGEP("hexagon-commgep", cl::init(true),
44 cl::Hidden, cl::ZeroOrMore, cl::desc("Enable commoning of GEP instructions"));
46 static cl::opt<bool> EnableGenExtract("hexagon-extract", cl::init(true),
47 cl::Hidden, cl::desc("Generate \"extract\" instructions"));
49 static cl::opt<bool> EnableGenPred("hexagon-gen-pred", cl::init(true),
50 cl::Hidden, cl::desc("Enable conversion of arithmetic operations to "
51 "predicate instructions"));
53 /// HexagonTargetMachineModule - Note that this is used on hosts that
54 /// cannot link in a library unless there are references into the
55 /// library. In particular, it seems that it is not possible to get
56 /// things to work on Win32 without this. Though it is unused, do not
58 extern "C" int HexagonTargetMachineModule;
59 int HexagonTargetMachineModule = 0;
61 extern "C" void LLVMInitializeHexagonTarget() {
62 // Register the target.
63 RegisterTargetMachine<HexagonTargetMachine> X(TheHexagonTarget);
66 static ScheduleDAGInstrs *createVLIWMachineSched(MachineSchedContext *C) {
67 return new VLIWMachineScheduler(C, make_unique<ConvergingVLIWScheduler>());
70 static MachineSchedRegistry
71 SchedCustomRegistry("hexagon", "Run Hexagon's custom scheduler",
72 createVLIWMachineSched);
75 FunctionPass *createHexagonCFGOptimizer();
76 FunctionPass *createHexagonCommonGEP();
77 FunctionPass *createHexagonCopyToCombine();
78 FunctionPass *createHexagonExpandCondsets();
79 FunctionPass *createHexagonExpandPredSpillCode();
80 FunctionPass *createHexagonFixupHwLoops();
81 FunctionPass *createHexagonGenExtract();
82 FunctionPass *createHexagonGenInsert();
83 FunctionPass *createHexagonGenPredicate();
84 FunctionPass *createHexagonHardwareLoops();
85 FunctionPass *createHexagonISelDag(HexagonTargetMachine &TM,
86 CodeGenOpt::Level OptLevel);
87 FunctionPass *createHexagonNewValueJump();
88 FunctionPass *createHexagonPacketizer();
89 FunctionPass *createHexagonPeephole();
90 FunctionPass *createHexagonRemoveExtendArgs(const HexagonTargetMachine &TM);
91 FunctionPass *createHexagonSplitConst32AndConst64();
92 } // end namespace llvm;
94 /// HexagonTargetMachine ctor - Create an ILP32 architecture model.
97 /// Hexagon_TODO: Do I need an aggregate alignment?
99 HexagonTargetMachine::HexagonTargetMachine(const Target &T, const Triple &TT,
100 StringRef CPU, StringRef FS,
101 const TargetOptions &Options,
102 Reloc::Model RM, CodeModel::Model CM,
103 CodeGenOpt::Level OL)
104 : LLVMTargetMachine(T, "e-m:e-p:32:32-i1:32-i64:64-a:0-n32", TT, CPU, FS,
105 Options, RM, CM, OL),
106 TLOF(make_unique<HexagonTargetObjectFile>()),
107 Subtarget(TT, CPU, FS, *this) {
111 HexagonTargetMachine::~HexagonTargetMachine() {}
114 /// Hexagon Code Generator Pass Configuration Options.
115 class HexagonPassConfig : public TargetPassConfig {
117 HexagonPassConfig(HexagonTargetMachine *TM, PassManagerBase &PM)
118 : TargetPassConfig(TM, PM) {
119 bool NoOpt = (TM->getOptLevel() == CodeGenOpt::None);
121 if (EnableExpandCondsets) {
122 Pass *Exp = createHexagonExpandCondsets();
123 insertPass(&RegisterCoalescerID, IdentifyingPassPtr(Exp));
128 HexagonTargetMachine &getHexagonTargetMachine() const {
129 return getTM<HexagonTargetMachine>();
133 createMachineScheduler(MachineSchedContext *C) const override {
134 return createVLIWMachineSched(C);
137 void addIRPasses() override;
138 bool addInstSelector() override;
139 void addPreRegAlloc() override;
140 void addPostRegAlloc() override;
141 void addPreSched2() override;
142 void addPreEmitPass() override;
146 TargetPassConfig *HexagonTargetMachine::createPassConfig(PassManagerBase &PM) {
147 return new HexagonPassConfig(this, PM);
150 void HexagonPassConfig::addIRPasses() {
151 TargetPassConfig::addIRPasses();
152 bool NoOpt = (getOptLevel() == CodeGenOpt::None);
154 addPass(createAtomicExpandPass(TM));
157 addPass(createHexagonCommonGEP());
158 // Replace certain combinations of shifts and ands with extracts.
159 if (EnableGenExtract)
160 addPass(createHexagonGenExtract());
164 bool HexagonPassConfig::addInstSelector() {
165 HexagonTargetMachine &TM = getHexagonTargetMachine();
166 bool NoOpt = (getOptLevel() == CodeGenOpt::None);
169 addPass(createHexagonRemoveExtendArgs(TM));
171 addPass(createHexagonISelDag(TM, getOptLevel()));
174 // Create logical operations on predicate registers.
176 addPass(createHexagonGenPredicate(), false);
177 addPass(createHexagonPeephole());
178 printAndVerify("After hexagon peephole pass");
180 addPass(createHexagonGenInsert(), false);
186 void HexagonPassConfig::addPreRegAlloc() {
187 if (getOptLevel() != CodeGenOpt::None)
188 if (!DisableHardwareLoops)
189 addPass(createHexagonHardwareLoops(), false);
192 void HexagonPassConfig::addPostRegAlloc() {
193 if (getOptLevel() != CodeGenOpt::None)
194 if (!DisableHexagonCFGOpt)
195 addPass(createHexagonCFGOptimizer(), false);
198 void HexagonPassConfig::addPreSched2() {
199 addPass(createHexagonCopyToCombine(), false);
200 if (getOptLevel() != CodeGenOpt::None)
201 addPass(&IfConverterID, false);
202 addPass(createHexagonSplitConst32AndConst64());
205 void HexagonPassConfig::addPreEmitPass() {
206 bool NoOpt = (getOptLevel() == CodeGenOpt::None);
209 addPass(createHexagonNewValueJump(), false);
211 // Expand Spill code for predicate registers.
212 addPass(createHexagonExpandPredSpillCode(), false);
216 if (!DisableHardwareLoops)
217 addPass(createHexagonFixupHwLoops(), false);
218 addPass(createHexagonPacketizer(), false);