LLVM 20.0.0git
RISCVPreLegalizerCombiner.cpp
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1//=== RISCVPreLegalizerCombiner.cpp ---------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This pass does combining of machine instructions at the generic MI level,
10// before the legalizer.
11//
12//===----------------------------------------------------------------------===//
13
14#include "RISCVSubtarget.h"
27
28#define GET_GICOMBINER_DEPS
29#include "RISCVGenPreLegalizeGICombiner.inc"
30#undef GET_GICOMBINER_DEPS
31
32#define DEBUG_TYPE "riscv-prelegalizer-combiner"
33
34using namespace llvm;
35
36namespace {
37
38#define GET_GICOMBINER_TYPES
39#include "RISCVGenPreLegalizeGICombiner.inc"
40#undef GET_GICOMBINER_TYPES
41
42class RISCVPreLegalizerCombinerImpl : public Combiner {
43protected:
44 // TODO: Make CombinerHelper methods const.
45 mutable CombinerHelper Helper;
46 const RISCVPreLegalizerCombinerImplRuleConfig &RuleConfig;
47 const RISCVSubtarget &STI;
48
49public:
50 RISCVPreLegalizerCombinerImpl(
51 MachineFunction &MF, CombinerInfo &CInfo, const TargetPassConfig *TPC,
52 GISelKnownBits &KB, GISelCSEInfo *CSEInfo,
53 const RISCVPreLegalizerCombinerImplRuleConfig &RuleConfig,
54 const RISCVSubtarget &STI, MachineDominatorTree *MDT,
55 const LegalizerInfo *LI);
56
57 static const char *getName() { return "RISCV00PreLegalizerCombiner"; }
58
59 bool tryCombineAll(MachineInstr &I) const override;
60
61private:
62#define GET_GICOMBINER_CLASS_MEMBERS
63#include "RISCVGenPreLegalizeGICombiner.inc"
64#undef GET_GICOMBINER_CLASS_MEMBERS
65};
66
67#define GET_GICOMBINER_IMPL
68#include "RISCVGenPreLegalizeGICombiner.inc"
69#undef GET_GICOMBINER_IMPL
70
71RISCVPreLegalizerCombinerImpl::RISCVPreLegalizerCombinerImpl(
72 MachineFunction &MF, CombinerInfo &CInfo, const TargetPassConfig *TPC,
73 GISelKnownBits &KB, GISelCSEInfo *CSEInfo,
74 const RISCVPreLegalizerCombinerImplRuleConfig &RuleConfig,
75 const RISCVSubtarget &STI, MachineDominatorTree *MDT,
76 const LegalizerInfo *LI)
77 : Combiner(MF, CInfo, TPC, &KB, CSEInfo),
78 Helper(Observer, B, /*IsPreLegalize*/ true, &KB, MDT, LI),
79 RuleConfig(RuleConfig), STI(STI),
81#include "RISCVGenPreLegalizeGICombiner.inc"
83{
84}
85
86// Pass boilerplate
87// ================
88
89class RISCVPreLegalizerCombiner : public MachineFunctionPass {
90public:
91 static char ID;
92
93 RISCVPreLegalizerCombiner();
94
95 StringRef getPassName() const override { return "RISCVPreLegalizerCombiner"; }
96
97 bool runOnMachineFunction(MachineFunction &MF) override;
98
99 void getAnalysisUsage(AnalysisUsage &AU) const override;
100
101private:
102 RISCVPreLegalizerCombinerImplRuleConfig RuleConfig;
103};
104} // end anonymous namespace
105
106void RISCVPreLegalizerCombiner::getAnalysisUsage(AnalysisUsage &AU) const {
108 AU.setPreservesCFG();
117}
118
119RISCVPreLegalizerCombiner::RISCVPreLegalizerCombiner()
122
123 if (!RuleConfig.parseCommandLineOption())
124 report_fatal_error("Invalid rule identifier");
125}
126
127bool RISCVPreLegalizerCombiner::runOnMachineFunction(MachineFunction &MF) {
128 if (MF.getProperties().hasProperty(
129 MachineFunctionProperties::Property::FailedISel))
130 return false;
131 auto &TPC = getAnalysis<TargetPassConfig>();
132
133 // Enable CSE.
135 getAnalysis<GISelCSEAnalysisWrapperPass>().getCSEWrapper();
136 auto *CSEInfo = &Wrapper.get(TPC.getCSEConfig());
137
139 const auto *LI = ST.getLegalizerInfo();
140
141 const Function &F = MF.getFunction();
142 bool EnableOpt =
143 MF.getTarget().getOptLevel() != CodeGenOptLevel::None && !skipFunction(F);
144 GISelKnownBits *KB = &getAnalysis<GISelKnownBitsAnalysis>().get(MF);
146 &getAnalysis<MachineDominatorTreeWrapperPass>().getDomTree();
147 CombinerInfo CInfo(/*AllowIllegalOps*/ true, /*ShouldLegalizeIllegal*/ false,
148 /*LegalizerInfo*/ nullptr, EnableOpt, F.hasOptSize(),
149 F.hasMinSize());
150 RISCVPreLegalizerCombinerImpl Impl(MF, CInfo, &TPC, *KB, CSEInfo, RuleConfig,
151 ST, MDT, LI);
152 return Impl.combineMachineInstrs();
153}
154
155char RISCVPreLegalizerCombiner::ID = 0;
156INITIALIZE_PASS_BEGIN(RISCVPreLegalizerCombiner, DEBUG_TYPE,
157 "Combine RISC-V machine instrs before legalization", false,
158 false)
162INITIALIZE_PASS_END(RISCVPreLegalizerCombiner, DEBUG_TYPE,
163 "Combine RISC-V machine instrs before legalization", false,
164 false)
165
166namespace llvm {
168 return new RISCVPreLegalizerCombiner();
169}
170} // end namespace llvm
amdgpu aa AMDGPU Address space based Alias Analysis Wrapper
basic Basic Alias true
static GCRegistry::Add< OcamlGC > B("ocaml", "ocaml 3.10-compatible GC")
Provides analysis for continuously CSEing during GISel passes.
This contains common combine transformations that may be used in a combine pass,or by the target else...
Option class for Targets to specify which operations are combined how and when.
This contains the base class for all Combiners generated by TableGen.
Provides analysis for querying information about KnownBits during GISel passes.
Hexagon Vector Combine
#define F(x, y, z)
Definition: MD5.cpp:55
#define I(x, y, z)
Definition: MD5.cpp:58
This file declares the MachineIRBuilder class.
#define INITIALIZE_PASS_DEPENDENCY(depName)
Definition: PassSupport.h:55
#define INITIALIZE_PASS_END(passName, arg, name, cfg, analysis)
Definition: PassSupport.h:57
#define INITIALIZE_PASS_BEGIN(passName, arg, name, cfg, analysis)
Definition: PassSupport.h:52
static StringRef getName(Value *V)
#define GET_GICOMBINER_CONSTRUCTOR_INITS
Combine RISC V machine instrs before legalization
#define DEBUG_TYPE
Target-Independent Code Generator Pass Configuration Options pass.
Represent the analysis usage information of a pass.
AnalysisUsage & addRequired()
AnalysisUsage & addPreserved()
Add the specified Pass class to the set of analyses preserved by this pass.
void setPreservesCFG()
This function should be called by the pass, iff they do not:
Definition: Pass.cpp:256
Combiner implementation.
Definition: Combiner.h:34
virtual bool tryCombineAll(MachineInstr &I) const =0
FunctionPass class - This class is used to implement most global optimizations.
Definition: Pass.h:310
The actual analysis pass wrapper.
Definition: CSEInfo.h:222
Simple wrapper that does the following.
Definition: CSEInfo.h:204
The CSE Analysis object.
Definition: CSEInfo.h:69
To use KnownBitsInfo analysis in a pass, KnownBitsInfo &Info = getAnalysis<GISelKnownBitsInfoAnalysis...
Analysis pass which computes a MachineDominatorTree.
DominatorTree Class - Concrete subclass of DominatorTreeBase that is used to compute a normal dominat...
MachineFunctionPass - This class adapts the FunctionPass interface to allow convenient creation of pa...
void getAnalysisUsage(AnalysisUsage &AU) const override
getAnalysisUsage - Subclasses that override getAnalysisUsage must call this.
virtual bool runOnMachineFunction(MachineFunction &MF)=0
runOnMachineFunction - This method must be overloaded to perform the desired machine code transformat...
bool hasProperty(Property P) const
const TargetSubtargetInfo & getSubtarget() const
getSubtarget - Return the subtarget for which this machine code is being compiled.
Function & getFunction()
Return the LLVM function that this machine code represents.
const LLVMTargetMachine & getTarget() const
getTarget - Return the target machine this machine code is compiled with
const MachineFunctionProperties & getProperties() const
Get the function properties.
Representation of each machine instruction.
Definition: MachineInstr.h:69
static PassRegistry * getPassRegistry()
getPassRegistry - Access the global registry object, which is automatically initialized at applicatio...
virtual StringRef getPassName() const
getPassName - Return a nice clean name for a pass.
Definition: Pass.cpp:81
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
CodeGenOptLevel getOptLevel() const
Returns the optimization level: None, Less, Default, or Aggressive.
Target-Independent Code Generator Pass Configuration Options.
unsigned ID
LLVM IR allows to use arbitrary numbers as calling convention identifiers.
Definition: CallingConv.h:24
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
void initializeRISCVPreLegalizerCombinerPass(PassRegistry &)
FunctionPass * createRISCVPreLegalizerCombiner()
void report_fatal_error(Error Err, bool gen_crash_diag=true)
Report a serious error, calling any installed error handler.
Definition: Error.cpp:167
void getSelectionDAGFallbackAnalysisUsage(AnalysisUsage &AU)
Modify analysis usage so it preserves passes required for the SelectionDAG fallback.
Definition: Utils.cpp:1168
auto instrs(const MachineBasicBlock &BB)