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llvm-mirror/lib/AsmParser/LLParser.h
Matt Arsenault ea505ad2f6 IR: Define byref parameter attribute 
This allows tracking the in-memory type of a pointer argument to a
function for ABI purposes. This is essentially a stripped down version
of byval to remove some of the stack-copy implications in its
definition.

This includes the base IR changes, and some tests for places where it
should be treated similarly to byval. Codegen support will be in a
future patch.

My original attempt at solving some of these problems was to repurpose
byval with a different address space from the stack. However, it is
technically permitted for the callee to introduce a write to the
argument, although nothing does this in reality. There is also talk of
removing and replacing the byval attribute, so a new attribute would
need to take its place anyway.

This is intended avoid some optimization issues with the current
handling of aggregate arguments, as well as fixes inflexibilty in how
frontends can specify the kernel ABI. The most honest representation
of the amdgpu_kernel convention is to expose all kernel arguments as
loads from constant memory. Today, these are raw, SSA Argument values
and codegen is responsible for turning these into loads.

Background:

There currently isn't a satisfactory way to represent how arguments
for the amdgpu_kernel calling convention are passed. In reality,
arguments are passed in a single, flat, constant memory buffer
implicitly passed to the function. It is also illegal to call this
function in the IR, and this is only ever invoked by a driver of some
kind.

It does not make sense to have a stack passed parameter in this
context as is implied by byval. It is never valid to write to the
kernel arguments, as this would corrupt the inputs seen by other
dispatches of the kernel. These argumets are also not in the same
address space as the stack, so a copy is needed to an alloca. From a
source C-like language, the kernel parameters are invisible.
Semantically, a copy is always required from the constant argument
memory to a mutable variable.

The current clang calling convention lowering emits raw values,
including aggregates into the function argument list, since using
byval would not make sense. This has some unfortunate consequences for
the optimizer. In the aggregate case, we end up with an aggregate
store to alloca, which both SROA and instcombine turn into a store of
each aggregate field. The optimizer never pieces this back together to
see that this is really just a copy from constant memory, so we end up
stuck with expensive stack usage.

This also means the backend dictates the alignment of arguments, and
arbitrarily picks the LLVM IR ABI type alignment. By allowing an
explicit alignment, frontends can make better decisions. For example,
there's real no advantage to an aligment higher than 4, so a frontend
could choose to compact the argument layout. Similarly, there is a
high penalty to using an alignment lower than 4, so a frontend could
opt into more padding for small arguments.

Another design consideration is when it is appropriate to expose the
fact that these arguments are all really passed in adjacent
memory. Currently we have a late IR optimization pass in codegen to
rewrite the kernel argument values into explicit loads to enable
vectorization. In most programs, unrelated argument loads can be
merged together. However, exposing this property directly from the
frontend has some disadvantages. We still need a way to track the
original argument sizes and alignments to report to the driver. I find
using some side-channel, metadata mechanism to track this
unappealing. If the kernel arguments were exposed as a single buffer
to begin with, alias analysis would be unaware that the padding bits
betewen arguments are meaningless. Another family of problems is there
are still some gaps in replacing all of the available parameter
attributes with metadata equivalents once lowered to loads.

The immediate plan is to start using this new attribute to handle all
aggregate argumets for kernels. Long term, it makes sense to migrate
all kernel arguments, including scalars, to be passed indirectly in
the same manner.

Additional context is in D79744.
2020-07-20 10:23:09 -04:00

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//===-- LLParser.h - Parser Class -------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines the parser class for .ll files.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_ASMPARSER_LLPARSER_H
#define LLVM_LIB_ASMPARSER_LLPARSER_H
#include "LLLexer.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/ModuleSummaryIndex.h"
#include "llvm/IR/Operator.h"
#include "llvm/IR/Type.h"
#include <map>
namespace llvm {
class Module;
class Function;
class Value;
class BasicBlock;
class Instruction;
class Constant;
class GlobalValue;
class Comdat;
class MDString;
class MDNode;
struct SlotMapping;
/// ValID - Represents a reference of a definition of some sort with no type.
/// There are several cases where we have to parse the value but where the
/// type can depend on later context. This may either be a numeric reference
/// or a symbolic (%var) reference. This is just a discriminated union.
struct ValID {
enum {
t_LocalID, t_GlobalID, // ID in UIntVal.
t_LocalName, t_GlobalName, // Name in StrVal.
t_APSInt, t_APFloat, // Value in APSIntVal/APFloatVal.
t_Null, t_Undef, t_Zero, t_None, // No value.
t_EmptyArray, // No value: []
t_Constant, // Value in ConstantVal.
t_InlineAsm, // Value in FTy/StrVal/StrVal2/UIntVal.
t_ConstantStruct, // Value in ConstantStructElts.
t_PackedConstantStruct // Value in ConstantStructElts.
} Kind = t_LocalID;
LLLexer::LocTy Loc;
unsigned UIntVal;
FunctionType *FTy = nullptr;
std::string StrVal, StrVal2;
APSInt APSIntVal;
APFloat APFloatVal{0.0};
Constant *ConstantVal;
std::unique_ptr<Constant *[]> ConstantStructElts;
ValID() = default;
ValID(const ValID &RHS)
: Kind(RHS.Kind), Loc(RHS.Loc), UIntVal(RHS.UIntVal), FTy(RHS.FTy),
StrVal(RHS.StrVal), StrVal2(RHS.StrVal2), APSIntVal(RHS.APSIntVal),
APFloatVal(RHS.APFloatVal), ConstantVal(RHS.ConstantVal) {
assert(!RHS.ConstantStructElts);
}
bool operator<(const ValID &RHS) const {
if (Kind == t_LocalID || Kind == t_GlobalID)
return UIntVal < RHS.UIntVal;
assert((Kind == t_LocalName || Kind == t_GlobalName ||
Kind == t_ConstantStruct || Kind == t_PackedConstantStruct) &&
"Ordering not defined for this ValID kind yet");
return StrVal < RHS.StrVal;
}
};
class LLParser {
public:
typedef LLLexer::LocTy LocTy;
private:
LLVMContext &Context;
LLLexer Lex;
// Module being parsed, null if we are only parsing summary index.
Module *M;
// Summary index being parsed, null if we are only parsing Module.
ModuleSummaryIndex *Index;
SlotMapping *Slots;
// Instruction metadata resolution. Each instruction can have a list of
// MDRef info associated with them.
//
// The simpler approach of just creating temporary MDNodes and then calling
// RAUW on them when the definition is processed doesn't work because some
// instruction metadata kinds, such as dbg, get stored in the IR in an
// "optimized" format which doesn't participate in the normal value use
// lists. This means that RAUW doesn't work, even on temporary MDNodes
// which otherwise support RAUW. Instead, we defer resolving MDNode
// references until the definitions have been processed.
struct MDRef {
SMLoc Loc;
unsigned MDKind, MDSlot;
};
SmallVector<Instruction*, 64> InstsWithTBAATag;
// Type resolution handling data structures. The location is set when we
// have processed a use of the type but not a definition yet.
StringMap<std::pair<Type*, LocTy> > NamedTypes;
std::map<unsigned, std::pair<Type*, LocTy> > NumberedTypes;
std::map<unsigned, TrackingMDNodeRef> NumberedMetadata;
std::map<unsigned, std::pair<TempMDTuple, LocTy>> ForwardRefMDNodes;
// Global Value reference information.
std::map<std::string, std::pair<GlobalValue*, LocTy> > ForwardRefVals;
std::map<unsigned, std::pair<GlobalValue*, LocTy> > ForwardRefValIDs;
std::vector<GlobalValue*> NumberedVals;
// Comdat forward reference information.
std::map<std::string, LocTy> ForwardRefComdats;
// References to blockaddress. The key is the function ValID, the value is
// a list of references to blocks in that function.
std::map<ValID, std::map<ValID, GlobalValue *>> ForwardRefBlockAddresses;
class PerFunctionState;
/// Reference to per-function state to allow basic blocks to be
/// forward-referenced by blockaddress instructions within the same
/// function.
PerFunctionState *BlockAddressPFS;
// Attribute builder reference information.
std::map<Value*, std::vector<unsigned> > ForwardRefAttrGroups;
std::map<unsigned, AttrBuilder> NumberedAttrBuilders;
// Summary global value reference information.
std::map<unsigned, std::vector<std::pair<ValueInfo *, LocTy>>>
ForwardRefValueInfos;
std::map<unsigned, std::vector<std::pair<AliasSummary *, LocTy>>>
ForwardRefAliasees;
std::vector<ValueInfo> NumberedValueInfos;
// Summary type id reference information.
std::map<unsigned, std::vector<std::pair<GlobalValue::GUID *, LocTy>>>
ForwardRefTypeIds;
// Map of module ID to path.
std::map<unsigned, StringRef> ModuleIdMap;
/// Only the llvm-as tool may set this to false to bypass
/// UpgradeDebuginfo so it can generate broken bitcode.
bool UpgradeDebugInfo;
std::string SourceFileName;
public:
LLParser(StringRef F, SourceMgr &SM, SMDiagnostic &Err, Module *M,
ModuleSummaryIndex *Index, LLVMContext &Context,
SlotMapping *Slots = nullptr)
: Context(Context), Lex(F, SM, Err, Context), M(M), Index(Index),
Slots(Slots), BlockAddressPFS(nullptr) {}
bool Run(
bool UpgradeDebugInfo,
DataLayoutCallbackTy DataLayoutCallback = [](Module *) {});
bool parseStandaloneConstantValue(Constant *&C, const SlotMapping *Slots);
bool parseTypeAtBeginning(Type *&Ty, unsigned &Read,
const SlotMapping *Slots);
LLVMContext &getContext() { return Context; }
private:
bool Error(LocTy L, const Twine &Msg) const {
return Lex.Error(L, Msg);
}
bool TokError(const Twine &Msg) const {
return Error(Lex.getLoc(), Msg);
}
/// Restore the internal name and slot mappings using the mappings that
/// were created at an earlier parsing stage.
void restoreParsingState(const SlotMapping *Slots);
/// GetGlobalVal - Get a value with the specified name or ID, creating a
/// forward reference record if needed. This can return null if the value
/// exists but does not have the right type.
GlobalValue *GetGlobalVal(const std::string &N, Type *Ty, LocTy Loc,
bool IsCall);
GlobalValue *GetGlobalVal(unsigned ID, Type *Ty, LocTy Loc, bool IsCall);
/// Get a Comdat with the specified name, creating a forward reference
/// record if needed.
Comdat *getComdat(const std::string &Name, LocTy Loc);
// Helper Routines.
bool ParseToken(lltok::Kind T, const char *ErrMsg);
bool EatIfPresent(lltok::Kind T) {
if (Lex.getKind() != T) return false;
Lex.Lex();
return true;
}
FastMathFlags EatFastMathFlagsIfPresent() {
FastMathFlags FMF;
while (true)
switch (Lex.getKind()) {
case lltok::kw_fast: FMF.setFast(); Lex.Lex(); continue;
case lltok::kw_nnan: FMF.setNoNaNs(); Lex.Lex(); continue;
case lltok::kw_ninf: FMF.setNoInfs(); Lex.Lex(); continue;
case lltok::kw_nsz: FMF.setNoSignedZeros(); Lex.Lex(); continue;
case lltok::kw_arcp: FMF.setAllowReciprocal(); Lex.Lex(); continue;
case lltok::kw_contract:
FMF.setAllowContract(true);
Lex.Lex();
continue;
case lltok::kw_reassoc: FMF.setAllowReassoc(); Lex.Lex(); continue;
case lltok::kw_afn: FMF.setApproxFunc(); Lex.Lex(); continue;
default: return FMF;
}
return FMF;
}
bool ParseOptionalToken(lltok::Kind T, bool &Present,
LocTy *Loc = nullptr) {
if (Lex.getKind() != T) {
Present = false;
} else {
if (Loc)
*Loc = Lex.getLoc();
Lex.Lex();
Present = true;
}
return false;
}
bool ParseStringConstant(std::string &Result);
bool ParseUInt32(unsigned &Val);
bool ParseUInt32(unsigned &Val, LocTy &Loc) {
Loc = Lex.getLoc();
return ParseUInt32(Val);
}
bool ParseUInt64(uint64_t &Val);
bool ParseUInt64(uint64_t &Val, LocTy &Loc) {
Loc = Lex.getLoc();
return ParseUInt64(Val);
}
bool ParseFlag(unsigned &Val);
bool ParseStringAttribute(AttrBuilder &B);
bool ParseTLSModel(GlobalVariable::ThreadLocalMode &TLM);
bool ParseOptionalThreadLocal(GlobalVariable::ThreadLocalMode &TLM);
bool ParseOptionalUnnamedAddr(GlobalVariable::UnnamedAddr &UnnamedAddr);
bool ParseOptionalAddrSpace(unsigned &AddrSpace, unsigned DefaultAS = 0);
bool ParseOptionalProgramAddrSpace(unsigned &AddrSpace) {
return ParseOptionalAddrSpace(
AddrSpace, M->getDataLayout().getProgramAddressSpace());
};
bool ParseOptionalParamAttrs(AttrBuilder &B);
bool ParseOptionalReturnAttrs(AttrBuilder &B);
bool ParseOptionalLinkage(unsigned &Res, bool &HasLinkage,
unsigned &Visibility, unsigned &DLLStorageClass,
bool &DSOLocal);
void ParseOptionalDSOLocal(bool &DSOLocal);
void ParseOptionalVisibility(unsigned &Res);
void ParseOptionalDLLStorageClass(unsigned &Res);
bool ParseOptionalCallingConv(unsigned &CC);
bool ParseOptionalAlignment(MaybeAlign &Alignment,
bool AllowParens = false);
bool ParseOptionalDerefAttrBytes(lltok::Kind AttrKind, uint64_t &Bytes);
bool ParseScopeAndOrdering(bool isAtomic, SyncScope::ID &SSID,
AtomicOrdering &Ordering);
bool ParseScope(SyncScope::ID &SSID);
bool ParseOrdering(AtomicOrdering &Ordering);
bool ParseOptionalStackAlignment(unsigned &Alignment);
bool ParseOptionalCommaAlign(MaybeAlign &Alignment, bool &AteExtraComma);
bool ParseOptionalCommaAddrSpace(unsigned &AddrSpace, LocTy &Loc,
bool &AteExtraComma);
bool ParseOptionalCommaInAlloca(bool &IsInAlloca);
bool parseAllocSizeArguments(unsigned &BaseSizeArg,
Optional<unsigned> &HowManyArg);
bool ParseIndexList(SmallVectorImpl<unsigned> &Indices,
bool &AteExtraComma);
bool ParseIndexList(SmallVectorImpl<unsigned> &Indices) {
bool AteExtraComma;
if (ParseIndexList(Indices, AteExtraComma)) return true;
if (AteExtraComma)
return TokError("expected index");
return false;
}
// Top-Level Entities
bool ParseTopLevelEntities();
bool ValidateEndOfModule(bool UpgradeDebugInfo);
bool ValidateEndOfIndex();
bool ParseTargetDefinitions();
bool ParseTargetDefinition();
bool ParseModuleAsm();
bool ParseSourceFileName();
bool ParseDepLibs(); // FIXME: Remove in 4.0.
bool ParseUnnamedType();
bool ParseNamedType();
bool ParseDeclare();
bool ParseDefine();
bool ParseGlobalType(bool &IsConstant);
bool ParseUnnamedGlobal();
bool ParseNamedGlobal();
bool ParseGlobal(const std::string &Name, LocTy NameLoc, unsigned Linkage,
bool HasLinkage, unsigned Visibility,
unsigned DLLStorageClass, bool DSOLocal,
GlobalVariable::ThreadLocalMode TLM,
GlobalVariable::UnnamedAddr UnnamedAddr);
bool parseIndirectSymbol(const std::string &Name, LocTy NameLoc,
unsigned L, unsigned Visibility,
unsigned DLLStorageClass, bool DSOLocal,
GlobalVariable::ThreadLocalMode TLM,
GlobalVariable::UnnamedAddr UnnamedAddr);
bool parseComdat();
bool ParseStandaloneMetadata();
bool ParseNamedMetadata();
bool ParseMDString(MDString *&Result);
bool ParseMDNodeID(MDNode *&Result);
bool ParseUnnamedAttrGrp();
bool ParseFnAttributeValuePairs(AttrBuilder &B,
std::vector<unsigned> &FwdRefAttrGrps,
bool inAttrGrp, LocTy &BuiltinLoc);
bool ParseByValWithOptionalType(Type *&Result);
bool ParseRequiredTypeAttr(Type *&Result, lltok::Kind AttrName);
bool ParsePreallocated(Type *&Result);
bool ParseByRef(Type *&Result);
// Module Summary Index Parsing.
bool SkipModuleSummaryEntry();
bool ParseSummaryEntry();
bool ParseModuleEntry(unsigned ID);
bool ParseModuleReference(StringRef &ModulePath);
bool ParseGVReference(ValueInfo &VI, unsigned &GVId);
bool ParseSummaryIndexFlags();
bool ParseBlockCount();
bool ParseGVEntry(unsigned ID);
bool ParseFunctionSummary(std::string Name, GlobalValue::GUID, unsigned ID);
bool ParseVariableSummary(std::string Name, GlobalValue::GUID, unsigned ID);
bool ParseAliasSummary(std::string Name, GlobalValue::GUID, unsigned ID);
bool ParseGVFlags(GlobalValueSummary::GVFlags &GVFlags);
bool ParseGVarFlags(GlobalVarSummary::GVarFlags &GVarFlags);
bool ParseOptionalFFlags(FunctionSummary::FFlags &FFlags);
bool ParseOptionalCalls(std::vector<FunctionSummary::EdgeTy> &Calls);
bool ParseHotness(CalleeInfo::HotnessType &Hotness);
bool ParseOptionalTypeIdInfo(FunctionSummary::TypeIdInfo &TypeIdInfo);
bool ParseTypeTests(std::vector<GlobalValue::GUID> &TypeTests);
bool ParseVFuncIdList(lltok::Kind Kind,
std::vector<FunctionSummary::VFuncId> &VFuncIdList);
bool ParseConstVCallList(
lltok::Kind Kind,
std::vector<FunctionSummary::ConstVCall> &ConstVCallList);
using IdToIndexMapType =
std::map<unsigned, std::vector<std::pair<unsigned, LocTy>>>;
bool ParseConstVCall(FunctionSummary::ConstVCall &ConstVCall,
IdToIndexMapType &IdToIndexMap, unsigned Index);
bool ParseVFuncId(FunctionSummary::VFuncId &VFuncId,
IdToIndexMapType &IdToIndexMap, unsigned Index);
bool ParseOptionalVTableFuncs(VTableFuncList &VTableFuncs);
bool ParseOptionalParamAccesses(
std::vector<FunctionSummary::ParamAccess> &Params);
bool ParseParamNo(uint64_t &ParamNo);
bool ParseParamAccess(FunctionSummary::ParamAccess &Param);
bool ParseParamAccessCall(FunctionSummary::ParamAccess::Call &Call);
bool ParseParamAccessOffset(ConstantRange &range);
bool ParseOptionalRefs(std::vector<ValueInfo> &Refs);
bool ParseTypeIdEntry(unsigned ID);
bool ParseTypeIdSummary(TypeIdSummary &TIS);
bool ParseTypeIdCompatibleVtableEntry(unsigned ID);
bool ParseTypeTestResolution(TypeTestResolution &TTRes);
bool ParseOptionalWpdResolutions(
std::map<uint64_t, WholeProgramDevirtResolution> &WPDResMap);
bool ParseWpdRes(WholeProgramDevirtResolution &WPDRes);
bool ParseOptionalResByArg(
std::map<std::vector<uint64_t>, WholeProgramDevirtResolution::ByArg>
&ResByArg);
bool ParseArgs(std::vector<uint64_t> &Args);
void AddGlobalValueToIndex(std::string Name, GlobalValue::GUID,
GlobalValue::LinkageTypes Linkage, unsigned ID,
std::unique_ptr<GlobalValueSummary> Summary);
// Type Parsing.
bool ParseType(Type *&Result, const Twine &Msg, bool AllowVoid = false);
bool ParseType(Type *&Result, bool AllowVoid = false) {
return ParseType(Result, "expected type", AllowVoid);
}
bool ParseType(Type *&Result, const Twine &Msg, LocTy &Loc,
bool AllowVoid = false) {
Loc = Lex.getLoc();
return ParseType(Result, Msg, AllowVoid);
}
bool ParseType(Type *&Result, LocTy &Loc, bool AllowVoid = false) {
Loc = Lex.getLoc();
return ParseType(Result, AllowVoid);
}
bool ParseAnonStructType(Type *&Result, bool Packed);
bool ParseStructBody(SmallVectorImpl<Type*> &Body);
bool ParseStructDefinition(SMLoc TypeLoc, StringRef Name,
std::pair<Type*, LocTy> &Entry,
Type *&ResultTy);
bool ParseArrayVectorType(Type *&Result, bool isVector);
bool ParseFunctionType(Type *&Result);
// Function Semantic Analysis.
class PerFunctionState {
LLParser &P;
Function &F;
std::map<std::string, std::pair<Value*, LocTy> > ForwardRefVals;
std::map<unsigned, std::pair<Value*, LocTy> > ForwardRefValIDs;
std::vector<Value*> NumberedVals;
/// FunctionNumber - If this is an unnamed function, this is the slot
/// number of it, otherwise it is -1.
int FunctionNumber;
public:
PerFunctionState(LLParser &p, Function &f, int functionNumber);
~PerFunctionState();
Function &getFunction() const { return F; }
bool FinishFunction();
/// GetVal - Get a value with the specified name or ID, creating a
/// forward reference record if needed. This can return null if the value
/// exists but does not have the right type.
Value *GetVal(const std::string &Name, Type *Ty, LocTy Loc, bool IsCall);
Value *GetVal(unsigned ID, Type *Ty, LocTy Loc, bool IsCall);
/// SetInstName - After an instruction is parsed and inserted into its
/// basic block, this installs its name.
bool SetInstName(int NameID, const std::string &NameStr, LocTy NameLoc,
Instruction *Inst);
/// GetBB - Get a basic block with the specified name or ID, creating a
/// forward reference record if needed. This can return null if the value
/// is not a BasicBlock.
BasicBlock *GetBB(const std::string &Name, LocTy Loc);
BasicBlock *GetBB(unsigned ID, LocTy Loc);
/// DefineBB - Define the specified basic block, which is either named or
/// unnamed. If there is an error, this returns null otherwise it returns
/// the block being defined.
BasicBlock *DefineBB(const std::string &Name, int NameID, LocTy Loc);
bool resolveForwardRefBlockAddresses();
};
bool ConvertValIDToValue(Type *Ty, ValID &ID, Value *&V,
PerFunctionState *PFS, bool IsCall);
Value *checkValidVariableType(LocTy Loc, const Twine &Name, Type *Ty,
Value *Val, bool IsCall);
bool parseConstantValue(Type *Ty, Constant *&C);
bool ParseValue(Type *Ty, Value *&V, PerFunctionState *PFS);
bool ParseValue(Type *Ty, Value *&V, PerFunctionState &PFS) {
return ParseValue(Ty, V, &PFS);
}
bool ParseValue(Type *Ty, Value *&V, LocTy &Loc,
PerFunctionState &PFS) {
Loc = Lex.getLoc();
return ParseValue(Ty, V, &PFS);
}
bool ParseTypeAndValue(Value *&V, PerFunctionState *PFS);
bool ParseTypeAndValue(Value *&V, PerFunctionState &PFS) {
return ParseTypeAndValue(V, &PFS);
}
bool ParseTypeAndValue(Value *&V, LocTy &Loc, PerFunctionState &PFS) {
Loc = Lex.getLoc();
return ParseTypeAndValue(V, PFS);
}
bool ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc,
PerFunctionState &PFS);
bool ParseTypeAndBasicBlock(BasicBlock *&BB, PerFunctionState &PFS) {
LocTy Loc;
return ParseTypeAndBasicBlock(BB, Loc, PFS);
}
struct ParamInfo {
LocTy Loc;
Value *V;
AttributeSet Attrs;
ParamInfo(LocTy loc, Value *v, AttributeSet attrs)
: Loc(loc), V(v), Attrs(attrs) {}
};
bool ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList,
PerFunctionState &PFS,
bool IsMustTailCall = false,
bool InVarArgsFunc = false);
bool
ParseOptionalOperandBundles(SmallVectorImpl<OperandBundleDef> &BundleList,
PerFunctionState &PFS);
bool ParseExceptionArgs(SmallVectorImpl<Value *> &Args,
PerFunctionState &PFS);
// Constant Parsing.
bool ParseValID(ValID &ID, PerFunctionState *PFS = nullptr);
bool ParseGlobalValue(Type *Ty, Constant *&C);
bool ParseGlobalTypeAndValue(Constant *&V);
bool ParseGlobalValueVector(SmallVectorImpl<Constant *> &Elts,
Optional<unsigned> *InRangeOp = nullptr);
bool parseOptionalComdat(StringRef GlobalName, Comdat *&C);
bool ParseMetadataAsValue(Value *&V, PerFunctionState &PFS);
bool ParseValueAsMetadata(Metadata *&MD, const Twine &TypeMsg,
PerFunctionState *PFS);
bool ParseMetadata(Metadata *&MD, PerFunctionState *PFS);
bool ParseMDTuple(MDNode *&MD, bool IsDistinct = false);
bool ParseMDNode(MDNode *&N);
bool ParseMDNodeTail(MDNode *&N);
bool ParseMDNodeVector(SmallVectorImpl<Metadata *> &Elts);
bool ParseMetadataAttachment(unsigned &Kind, MDNode *&MD);
bool ParseInstructionMetadata(Instruction &Inst);
bool ParseGlobalObjectMetadataAttachment(GlobalObject &GO);
bool ParseOptionalFunctionMetadata(Function &F);
template <class FieldTy>
bool ParseMDField(LocTy Loc, StringRef Name, FieldTy &Result);
template <class FieldTy> bool ParseMDField(StringRef Name, FieldTy &Result);
template <class ParserTy>
bool ParseMDFieldsImplBody(ParserTy parseField);
template <class ParserTy>
bool ParseMDFieldsImpl(ParserTy parseField, LocTy &ClosingLoc);
bool ParseSpecializedMDNode(MDNode *&N, bool IsDistinct = false);
#define HANDLE_SPECIALIZED_MDNODE_LEAF(CLASS) \
bool Parse##CLASS(MDNode *&Result, bool IsDistinct);
#include "llvm/IR/Metadata.def"
// Function Parsing.
struct ArgInfo {
LocTy Loc;
Type *Ty;
AttributeSet Attrs;
std::string Name;
ArgInfo(LocTy L, Type *ty, AttributeSet Attr, const std::string &N)
: Loc(L), Ty(ty), Attrs(Attr), Name(N) {}
};
bool ParseArgumentList(SmallVectorImpl<ArgInfo> &ArgList, bool &isVarArg);
bool ParseFunctionHeader(Function *&Fn, bool isDefine);
bool ParseFunctionBody(Function &Fn);
bool ParseBasicBlock(PerFunctionState &PFS);
enum TailCallType { TCT_None, TCT_Tail, TCT_MustTail };
// Instruction Parsing. Each instruction parsing routine can return with a
// normal result, an error result, or return having eaten an extra comma.
enum InstResult { InstNormal = 0, InstError = 1, InstExtraComma = 2 };
int ParseInstruction(Instruction *&Inst, BasicBlock *BB,
PerFunctionState &PFS);
bool ParseCmpPredicate(unsigned &P, unsigned Opc);
bool ParseRet(Instruction *&Inst, BasicBlock *BB, PerFunctionState &PFS);
bool ParseBr(Instruction *&Inst, PerFunctionState &PFS);
bool ParseSwitch(Instruction *&Inst, PerFunctionState &PFS);
bool ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS);
bool ParseInvoke(Instruction *&Inst, PerFunctionState &PFS);
bool ParseResume(Instruction *&Inst, PerFunctionState &PFS);
bool ParseCleanupRet(Instruction *&Inst, PerFunctionState &PFS);
bool ParseCatchRet(Instruction *&Inst, PerFunctionState &PFS);
bool ParseCatchSwitch(Instruction *&Inst, PerFunctionState &PFS);
bool ParseCatchPad(Instruction *&Inst, PerFunctionState &PFS);
bool ParseCleanupPad(Instruction *&Inst, PerFunctionState &PFS);
bool ParseCallBr(Instruction *&Inst, PerFunctionState &PFS);
bool ParseUnaryOp(Instruction *&Inst, PerFunctionState &PFS, unsigned Opc,
bool IsFP);
bool ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, unsigned Opc,
bool IsFP);
bool ParseLogical(Instruction *&Inst, PerFunctionState &PFS, unsigned Opc);
bool ParseCompare(Instruction *&Inst, PerFunctionState &PFS, unsigned Opc);
bool ParseCast(Instruction *&Inst, PerFunctionState &PFS, unsigned Opc);
bool ParseSelect(Instruction *&Inst, PerFunctionState &PFS);
bool ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS);
bool ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS);
bool ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS);
bool ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS);
int ParsePHI(Instruction *&Inst, PerFunctionState &PFS);
bool ParseLandingPad(Instruction *&Inst, PerFunctionState &PFS);
bool ParseCall(Instruction *&Inst, PerFunctionState &PFS,
CallInst::TailCallKind TCK);
int ParseAlloc(Instruction *&Inst, PerFunctionState &PFS);
int ParseLoad(Instruction *&Inst, PerFunctionState &PFS);
int ParseStore(Instruction *&Inst, PerFunctionState &PFS);
int ParseCmpXchg(Instruction *&Inst, PerFunctionState &PFS);
int ParseAtomicRMW(Instruction *&Inst, PerFunctionState &PFS);
int ParseFence(Instruction *&Inst, PerFunctionState &PFS);
int ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS);
int ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS);
int ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS);
bool ParseFreeze(Instruction *&I, PerFunctionState &PFS);
// Use-list order directives.
bool ParseUseListOrder(PerFunctionState *PFS = nullptr);
bool ParseUseListOrderBB();
bool ParseUseListOrderIndexes(SmallVectorImpl<unsigned> &Indexes);
bool sortUseListOrder(Value *V, ArrayRef<unsigned> Indexes, SMLoc Loc);
};
} // End llvm namespace
#endif
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