WebSVN – QNX 8.QNX8 LLVM/Clang compiler suite – Blame – /llvm-build/x86_64/include/llvm/TableGen/Record.h

Rev	Author	Line No.	Line
14	pmbaty	1	//===- llvm/TableGen/Record.h - Classes for Table Records -------- C++ --===//
		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 file defines the main TableGen data structures, including the TableGen
		10	// types, values, and high-level data structures.
		11	//
		12	//===----------------------------------------------------------------------===//
		13
		14	#ifndef LLVM_TABLEGEN_RECORD_H
		15	#define LLVM_TABLEGEN_RECORD_H
		16
		17	#include "llvm/ADT/ArrayRef.h"
		18	#include "llvm/ADT/DenseMap.h"
		19	#include "llvm/ADT/DenseSet.h"
		20	#include "llvm/ADT/FoldingSet.h"
		21	#include "llvm/ADT/PointerIntPair.h"
		22	#include "llvm/ADT/SmallVector.h"
		23	#include "llvm/ADT/StringExtras.h"
		24	#include "llvm/ADT/StringRef.h"
		25	#include "llvm/Support/Casting.h"
		26	#include "llvm/Support/ErrorHandling.h"
		27	#include "llvm/Support/SMLoc.h"
		28	#include "llvm/Support/Timer.h"
		29	#include "llvm/Support/TrailingObjects.h"
		30	#include "llvm/Support/raw_ostream.h"
		31	#include <cassert>
		32	#include <cstddef>
		33	#include <cstdint>
		34	#include <map>
		35	#include <memory>
		36	#include <optional>
		37	#include <string>
		38	#include <utility>
		39	#include <vector>
		40
		41	namespace llvm {
		42	namespace detail {
		43	struct RecordKeeperImpl;
		44	} // namespace detail
		45
		46	class ListRecTy;
		47	class Record;
		48	class RecordKeeper;
		49	class RecordVal;
		50	class Resolver;
		51	class StringInit;
		52	class TypedInit;
		53
		54	//===----------------------------------------------------------------------===//
		55	// Type Classes
		56	//===----------------------------------------------------------------------===//
		57
		58	class RecTy {
		59	public:
		60	/// Subclass discriminator (for dyn_cast<> et al.)
		61	enum RecTyKind {
		62	BitRecTyKind,
		63	BitsRecTyKind,
		64	IntRecTyKind,
		65	StringRecTyKind,
		66	ListRecTyKind,
		67	DagRecTyKind,
		68	RecordRecTyKind
		69	};
		70
		71	private:
		72	RecTyKind Kind;
		73	/// The RecordKeeper that uniqued this Type.
		74	RecordKeeper &RK;
		75	/// ListRecTy of the list that has elements of this type.
		76	ListRecTy *ListTy = nullptr;
		77
		78	public:
		79	RecTy(RecTyKind K, RecordKeeper &RK) : Kind(K), RK(RK) {}
		80	virtual ~RecTy() = default;
		81
		82	RecTyKind getRecTyKind() const { return Kind; }
		83
		84	/// Return the RecordKeeper that uniqued this Type.
		85	RecordKeeper &getRecordKeeper() const { return RK; }
		86
		87	virtual std::string getAsString() const = 0;
		88	void print(raw_ostream &OS) const { OS << getAsString(); }
		89	void dump() const;
		90
		91	/// Return true if all values of 'this' type can be converted to the specified
		92	/// type.
		93	virtual bool typeIsConvertibleTo(const RecTy *RHS) const;
		94
		95	/// Return true if 'this' type is equal to or a subtype of RHS. For example,
		96	/// a bit set is not an int, but they are convertible.
		97	virtual bool typeIsA(const RecTy *RHS) const;
		98
		99	/// Returns the type representing list<thistype>.
		100	ListRecTy *getListTy();
		101	};
		102
		103	inline raw_ostream &operator<<(raw_ostream &OS, const RecTy &Ty) {
		104	Ty.print(OS);
		105	return OS;
		106	}
		107
		108	/// 'bit' - Represent a single bit
		109	class BitRecTy : public RecTy {
		110	friend detail::RecordKeeperImpl;
		111
		112	BitRecTy(RecordKeeper &RK) : RecTy(BitRecTyKind, RK) {}
		113
		114	public:
		115	static bool classof(const RecTy *RT) {
		116	return RT->getRecTyKind() == BitRecTyKind;
		117	}
		118
		119	static BitRecTy *get(RecordKeeper &RK);
		120
		121	std::string getAsString() const override { return "bit"; }
		122
		123	bool typeIsConvertibleTo(const RecTy *RHS) const override;
		124	};
		125
		126	/// 'bits<n>' - Represent a fixed number of bits
		127	class BitsRecTy : public RecTy {
		128	unsigned Size;
		129
		130	explicit BitsRecTy(RecordKeeper &RK, unsigned Sz)
		131	: RecTy(BitsRecTyKind, RK), Size(Sz) {}
		132
		133	public:
		134	static bool classof(const RecTy *RT) {
		135	return RT->getRecTyKind() == BitsRecTyKind;
		136	}
		137
		138	static BitsRecTy *get(RecordKeeper &RK, unsigned Sz);
		139
		140	unsigned getNumBits() const { return Size; }
		141
		142	std::string getAsString() const override;
		143
		144	bool typeIsConvertibleTo(const RecTy *RHS) const override;
		145
		146	bool typeIsA(const RecTy *RHS) const override;
		147	};
		148
		149	/// 'int' - Represent an integer value of no particular size
		150	class IntRecTy : public RecTy {
		151	friend detail::RecordKeeperImpl;
		152
		153	IntRecTy(RecordKeeper &RK) : RecTy(IntRecTyKind, RK) {}
		154
		155	public:
		156	static bool classof(const RecTy *RT) {
		157	return RT->getRecTyKind() == IntRecTyKind;
		158	}
		159
		160	static IntRecTy *get(RecordKeeper &RK);
		161
		162	std::string getAsString() const override { return "int"; }
		163
		164	bool typeIsConvertibleTo(const RecTy *RHS) const override;
		165	};
		166
		167	/// 'string' - Represent an string value
		168	class StringRecTy : public RecTy {
		169	friend detail::RecordKeeperImpl;
		170
		171	StringRecTy(RecordKeeper &RK) : RecTy(StringRecTyKind, RK) {}
		172
		173	public:
		174	static bool classof(const RecTy *RT) {
		175	return RT->getRecTyKind() == StringRecTyKind;
		176	}
		177
		178	static StringRecTy *get(RecordKeeper &RK);
		179
		180	std::string getAsString() const override;
		181
		182	bool typeIsConvertibleTo(const RecTy *RHS) const override;
		183	};
		184
		185	/// 'list<Ty>' - Represent a list of element values, all of which must be of
		186	/// the specified type. The type is stored in ElementTy.
		187	class ListRecTy : public RecTy {
		188	friend ListRecTy *RecTy::getListTy();
		189
		190	RecTy *ElementTy;
		191
		192	explicit ListRecTy(RecTy *T)
		193	: RecTy(ListRecTyKind, T->getRecordKeeper()), ElementTy(T) {}
		194
		195	public:
		196	static bool classof(const RecTy *RT) {
		197	return RT->getRecTyKind() == ListRecTyKind;
		198	}
		199
		200	static ListRecTy get(RecTy T) { return T->getListTy(); }
		201	RecTy *getElementType() const { return ElementTy; }
		202
		203	std::string getAsString() const override;
		204
		205	bool typeIsConvertibleTo(const RecTy *RHS) const override;
		206
		207	bool typeIsA(const RecTy *RHS) const override;
		208	};
		209
		210	/// 'dag' - Represent a dag fragment
		211	class DagRecTy : public RecTy {
		212	friend detail::RecordKeeperImpl;
		213
		214	DagRecTy(RecordKeeper &RK) : RecTy(DagRecTyKind, RK) {}
		215
		216	public:
		217	static bool classof(const RecTy *RT) {
		218	return RT->getRecTyKind() == DagRecTyKind;
		219	}
		220
		221	static DagRecTy *get(RecordKeeper &RK);
		222
		223	std::string getAsString() const override;
		224	};
		225
		226	/// '[classname]' - Type of record values that have zero or more superclasses.
		227	///
		228	/// The list of superclasses is non-redundant, i.e. only contains classes that
		229	/// are not the superclass of some other listed class.
		230	class RecordRecTy final : public RecTy, public FoldingSetNode,
		231	public TrailingObjects<RecordRecTy, Record *> {
		232	friend class Record;
		233	friend detail::RecordKeeperImpl;
		234
		235	unsigned NumClasses;
		236
		237	explicit RecordRecTy(RecordKeeper &RK, unsigned Num)
		238	: RecTy(RecordRecTyKind, RK), NumClasses(Num) {}
		239
		240	public:
		241	RecordRecTy(const RecordRecTy &) = delete;
		242	RecordRecTy &operator=(const RecordRecTy &) = delete;
		243
		244	// Do not use sized deallocation due to trailing objects.
		245	void operator delete(void *p) { ::operator delete(p); }
		246
		247	static bool classof(const RecTy *RT) {
		248	return RT->getRecTyKind() == RecordRecTyKind;
		249	}
		250
		251	/// Get the record type with the given non-redundant list of superclasses.
		252	static RecordRecTy get(RecordKeeper &RK, ArrayRef<Record > Classes);
		253	static RecordRecTy get(Record Class);
		254
		255	void Profile(FoldingSetNodeID &ID) const;
		256
		257	ArrayRef<Record *> getClasses() const {
		258	return ArrayRef(getTrailingObjects<Record *>(), NumClasses);
		259	}
		260
		261	using const_record_iterator = Record * const *;
		262
		263	const_record_iterator classes_begin() const { return getClasses().begin(); }
		264	const_record_iterator classes_end() const { return getClasses().end(); }
		265
		266	std::string getAsString() const override;
		267
		268	bool isSubClassOf(Record *Class) const;
		269	bool typeIsConvertibleTo(const RecTy *RHS) const override;
		270
		271	bool typeIsA(const RecTy *RHS) const override;
		272	};
		273
		274	/// Find a common type that T1 and T2 convert to.
		275	/// Return 0 if no such type exists.
		276	RecTy resolveTypes(RecTy T1, RecTy *T2);
		277
		278	//===----------------------------------------------------------------------===//
		279	// Initializer Classes
		280	//===----------------------------------------------------------------------===//
		281
		282	class Init {
		283	protected:
		284	/// Discriminator enum (for isa<>, dyn_cast<>, et al.)
		285	///
		286	/// This enum is laid out by a preorder traversal of the inheritance
		287	/// hierarchy, and does not contain an entry for abstract classes, as per
		288	/// the recommendation in docs/HowToSetUpLLVMStyleRTTI.rst.
		289	///
		290	/// We also explicitly include "first" and "last" values for each
		291	/// interior node of the inheritance tree, to make it easier to read the
		292	/// corresponding classof().
		293	///
		294	/// We could pack these a bit tighter by not having the IK_FirstXXXInit
		295	/// and IK_LastXXXInit be their own values, but that would degrade
		296	/// readability for really no benefit.
		297	enum InitKind : uint8_t {
		298	IK_First, // unused; silence a spurious warning
		299	IK_FirstTypedInit,
		300	IK_BitInit,
		301	IK_BitsInit,
		302	IK_DagInit,
		303	IK_DefInit,
		304	IK_FieldInit,
		305	IK_IntInit,
		306	IK_ListInit,
		307	IK_FirstOpInit,
		308	IK_BinOpInit,
		309	IK_TernOpInit,
		310	IK_UnOpInit,
		311	IK_LastOpInit,
		312	IK_CondOpInit,
		313	IK_FoldOpInit,
		314	IK_IsAOpInit,
		315	IK_ExistsOpInit,
		316	IK_AnonymousNameInit,
		317	IK_StringInit,
		318	IK_VarInit,
		319	IK_VarListElementInit,
		320	IK_VarBitInit,
		321	IK_VarDefInit,
		322	IK_LastTypedInit,
		323	IK_UnsetInit
		324	};
		325
		326	private:
		327	const InitKind Kind;
		328
		329	protected:
		330	uint8_t Opc; // Used by UnOpInit, BinOpInit, and TernOpInit
		331
		332	private:
		333	virtual void anchor();
		334
		335	public:
		336	/// Get the kind (type) of the value.
		337	InitKind getKind() const { return Kind; }
		338
		339	/// Get the record keeper that initialized this Init.
		340	RecordKeeper &getRecordKeeper() const;
		341
		342	protected:
		343	explicit Init(InitKind K, uint8_t Opc = 0) : Kind(K), Opc(Opc) {}
		344
		345	public:
		346	Init(const Init &) = delete;
		347	Init &operator=(const Init &) = delete;
		348	virtual ~Init() = default;
		349
		350	/// Is this a complete value with no unset (uninitialized) subvalues?
		351	virtual bool isComplete() const { return true; }
		352
		353	/// Is this a concrete and fully resolved value without any references or
		354	/// stuck operations? Unset values are concrete.
		355	virtual bool isConcrete() const { return false; }
		356
		357	/// Print this value.
		358	void print(raw_ostream &OS) const { OS << getAsString(); }
		359
		360	/// Convert this value to a literal form.
		361	virtual std::string getAsString() const = 0;
		362
		363	/// Convert this value to a literal form,
		364	/// without adding quotes around a string.
		365	virtual std::string getAsUnquotedString() const { return getAsString(); }
		366
		367	/// Debugging method that may be called through a debugger; just
		368	/// invokes print on stderr.
		369	void dump() const;
		370
		371	/// If this value is convertible to type \p Ty, return a value whose
		372	/// type is \p Ty, generating a !cast operation if required.
		373	/// Otherwise, return null.
		374	virtual Init getCastTo(RecTy Ty) const = 0;
		375
		376	/// Convert to a value whose type is \p Ty, or return null if this
		377	/// is not possible. This can happen if the value's type is convertible
		378	/// to \p Ty, but there are unresolved references.
		379	virtual Init convertInitializerTo(RecTy Ty) const = 0;
		380
		381	/// This function is used to implement the bit range
		382	/// selection operator. Given a value, it selects the specified bits,
		383	/// returning them as a new \p Init of type \p bits. If it is not legal
		384	/// to use the bit selection operator on this value, null is returned.
		385	virtual Init *convertInitializerBitRange(ArrayRef<unsigned> Bits) const {
		386	return nullptr;
		387	}
		388
		389	/// This function is used to implement the list slice
		390	/// selection operator. Given a value, it selects the specified list
		391	/// elements, returning them as a new \p Init of type \p list. If it
		392	/// is not legal to use the slice operator, null is returned.
		393	virtual Init *convertInitListSlice(ArrayRef<unsigned> Elements) const {
		394	return nullptr;
		395	}
		396
		397	/// This function is used to implement the FieldInit class.
		398	/// Implementors of this method should return the type of the named
		399	/// field if they are of type record.
		400	virtual RecTy getFieldType(StringInit FieldName) const {
		401	return nullptr;
		402	}
		403
		404	/// This function is used by classes that refer to other
		405	/// variables which may not be defined at the time the expression is formed.
		406	/// If a value is set for the variable later, this method will be called on
		407	/// users of the value to allow the value to propagate out.
		408	virtual Init *resolveReferences(Resolver &R) const {
		409	return const_cast<Init *>(this);
		410	}
		411
		412	/// Get the \p Init value of the specified bit.
		413	virtual Init *getBit(unsigned Bit) const = 0;
		414	};
		415
		416	inline raw_ostream &operator<<(raw_ostream &OS, const Init &I) {
		417	I.print(OS); return OS;
		418	}
		419
		420	/// This is the common superclass of types that have a specific,
		421	/// explicit type, stored in ValueTy.
		422	class TypedInit : public Init {
		423	RecTy *ValueTy;
		424
		425	protected:
		426	explicit TypedInit(InitKind K, RecTy *T, uint8_t Opc = 0)
		427	: Init(K, Opc), ValueTy(T) {}
		428
		429	public:
		430	TypedInit(const TypedInit &) = delete;
		431	TypedInit &operator=(const TypedInit &) = delete;
		432
		433	static bool classof(const Init *I) {
		434	return I->getKind() >= IK_FirstTypedInit &&
		435	I->getKind() <= IK_LastTypedInit;
		436	}
		437
		438	/// Get the type of the Init as a RecTy.
		439	RecTy *getType() const { return ValueTy; }
		440
		441	/// Get the record keeper that initialized this Init.
		442	RecordKeeper &getRecordKeeper() const { return ValueTy->getRecordKeeper(); }
		443
		444	Init getCastTo(RecTy Ty) const override;
		445	Init convertInitializerTo(RecTy Ty) const override;
		446
		447	Init *convertInitializerBitRange(ArrayRef<unsigned> Bits) const override;
		448	Init *convertInitListSlice(ArrayRef<unsigned> Elements) const override;
		449
		450	/// This method is used to implement the FieldInit class.
		451	/// Implementors of this method should return the type of the named field if
		452	/// they are of type record.
		453	RecTy getFieldType(StringInit FieldName) const override;
		454	};
		455
		456	/// '?' - Represents an uninitialized value.
		457	class UnsetInit : public Init {
		458	friend detail::RecordKeeperImpl;
		459
		460	/// The record keeper that initialized this Init.
		461	RecordKeeper &RK;
		462
		463	UnsetInit(RecordKeeper &RK) : Init(IK_UnsetInit), RK(RK) {}
		464
		465	public:
		466	UnsetInit(const UnsetInit &) = delete;
		467	UnsetInit &operator=(const UnsetInit &) = delete;
		468
		469	static bool classof(const Init *I) {
		470	return I->getKind() == IK_UnsetInit;
		471	}
		472
		473	/// Get the singleton unset Init.
		474	static UnsetInit *get(RecordKeeper &RK);
		475
		476	/// Get the record keeper that initialized this Init.
		477	RecordKeeper &getRecordKeeper() const { return RK; }
		478
		479	Init getCastTo(RecTy Ty) const override;
		480	Init convertInitializerTo(RecTy Ty) const override;
		481
		482	Init *getBit(unsigned Bit) const override {
		483	return const_cast<UnsetInit*>(this);
		484	}
		485
		486	/// Is this a complete value with no unset (uninitialized) subvalues?
		487	bool isComplete() const override { return false; }
		488
		489	bool isConcrete() const override { return true; }
		490
		491	/// Get the string representation of the Init.
		492	std::string getAsString() const override { return "?"; }
		493	};
		494
		495	/// 'true'/'false' - Represent a concrete initializer for a bit.
		496	class BitInit final : public TypedInit {
		497	friend detail::RecordKeeperImpl;
		498
		499	bool Value;
		500
		501	explicit BitInit(bool V, RecTy *T) : TypedInit(IK_BitInit, T), Value(V) {}
		502
		503	public:
		504	BitInit(const BitInit &) = delete;
		505	BitInit &operator=(BitInit &) = delete;
		506
		507	static bool classof(const Init *I) {
		508	return I->getKind() == IK_BitInit;
		509	}
		510
		511	static BitInit *get(RecordKeeper &RK, bool V);
		512
		513	bool getValue() const { return Value; }
		514
		515	Init convertInitializerTo(RecTy Ty) const override;
		516
		517	Init *getBit(unsigned Bit) const override {
		518	assert(Bit < 1 && "Bit index out of range!");
		519	return const_cast<BitInit*>(this);
		520	}
		521
		522	bool isConcrete() const override { return true; }
		523	std::string getAsString() const override { return Value ? "1" : "0"; }
		524	};
		525
		526	/// '{ a, b, c }' - Represents an initializer for a BitsRecTy value.
		527	/// It contains a vector of bits, whose size is determined by the type.
		528	class BitsInit final : public TypedInit, public FoldingSetNode,
		529	public TrailingObjects<BitsInit, Init *> {
		530	unsigned NumBits;
		531
		532	BitsInit(RecordKeeper &RK, unsigned N)
		533	: TypedInit(IK_BitsInit, BitsRecTy::get(RK, N)), NumBits(N) {}
		534
		535	public:
		536	BitsInit(const BitsInit &) = delete;
		537	BitsInit &operator=(const BitsInit &) = delete;
		538
		539	// Do not use sized deallocation due to trailing objects.
		540	void operator delete(void *p) { ::operator delete(p); }
		541
		542	static bool classof(const Init *I) {
		543	return I->getKind() == IK_BitsInit;
		544	}
		545
		546	static BitsInit get(RecordKeeper &RK, ArrayRef<Init > Range);
		547
		548	void Profile(FoldingSetNodeID &ID) const;
		549
		550	unsigned getNumBits() const { return NumBits; }
		551
		552	Init convertInitializerTo(RecTy Ty) const override;
		553	Init *convertInitializerBitRange(ArrayRef<unsigned> Bits) const override;
		554
		555	bool isComplete() const override {
		556	for (unsigned i = 0; i != getNumBits(); ++i)
		557	if (!getBit(i)->isComplete()) return false;
		558	return true;
		559	}
		560
		561	bool allInComplete() const {
		562	for (unsigned i = 0; i != getNumBits(); ++i)
		563	if (getBit(i)->isComplete()) return false;
		564	return true;
		565	}
		566
		567	bool isConcrete() const override;
		568	std::string getAsString() const override;
		569
		570	Init *resolveReferences(Resolver &R) const override;
		571
		572	Init *getBit(unsigned Bit) const override {
		573	assert(Bit < NumBits && "Bit index out of range!");
		574	return getTrailingObjects<Init *>()[Bit];
		575	}
		576	};
		577
		578	/// '7' - Represent an initialization by a literal integer value.
		579	class IntInit : public TypedInit {
		580	int64_t Value;
		581
		582	explicit IntInit(RecordKeeper &RK, int64_t V)
		583	: TypedInit(IK_IntInit, IntRecTy::get(RK)), Value(V) {}
		584
		585	public:
		586	IntInit(const IntInit &) = delete;
		587	IntInit &operator=(const IntInit &) = delete;
		588
		589	static bool classof(const Init *I) {
		590	return I->getKind() == IK_IntInit;
		591	}
		592
		593	static IntInit *get(RecordKeeper &RK, int64_t V);
		594
		595	int64_t getValue() const { return Value; }
		596
		597	Init convertInitializerTo(RecTy Ty) const override;
		598	Init *convertInitializerBitRange(ArrayRef<unsigned> Bits) const override;
		599
		600	bool isConcrete() const override { return true; }
		601	std::string getAsString() const override;
		602
		603	Init *getBit(unsigned Bit) const override {
		604	return BitInit::get(getRecordKeeper(), (Value & (1ULL << Bit)) != 0);
		605	}
		606	};
		607
		608	/// "anonymous_n" - Represent an anonymous record name
		609	class AnonymousNameInit : public TypedInit {
		610	unsigned Value;
		611
		612	explicit AnonymousNameInit(RecordKeeper &RK, unsigned V)
		613	: TypedInit(IK_AnonymousNameInit, StringRecTy::get(RK)), Value(V) {}
		614
		615	public:
		616	AnonymousNameInit(const AnonymousNameInit &) = delete;
		617	AnonymousNameInit &operator=(const AnonymousNameInit &) = delete;
		618
		619	static bool classof(const Init *I) {
		620	return I->getKind() == IK_AnonymousNameInit;
		621	}
		622
		623	static AnonymousNameInit *get(RecordKeeper &RK, unsigned);
		624
		625	unsigned getValue() const { return Value; }
		626
		627	StringInit *getNameInit() const;
		628
		629	std::string getAsString() const override;
		630
		631	Init *resolveReferences(Resolver &R) const override;
		632
		633	Init *getBit(unsigned Bit) const override {
		634	llvm_unreachable("Illegal bit reference off string");
		635	}
		636	};
		637
		638	/// "foo" - Represent an initialization by a string value.
		639	class StringInit : public TypedInit {
		640	public:
		641	enum StringFormat {
		642	SF_String, // Format as "text"
		643	SF_Code, // Format as [{text}]
		644	};
		645
		646	private:
		647	StringRef Value;
		648	StringFormat Format;
		649
		650	explicit StringInit(RecordKeeper &RK, StringRef V, StringFormat Fmt)
		651	: TypedInit(IK_StringInit, StringRecTy::get(RK)), Value(V), Format(Fmt) {}
		652
		653	public:
		654	StringInit(const StringInit &) = delete;
		655	StringInit &operator=(const StringInit &) = delete;
		656
		657	static bool classof(const Init *I) {
		658	return I->getKind() == IK_StringInit;
		659	}
		660
		661	static StringInit *get(RecordKeeper &RK, StringRef,
		662	StringFormat Fmt = SF_String);
		663
		664	static StringFormat determineFormat(StringFormat Fmt1, StringFormat Fmt2) {
		665	return (Fmt1 == SF_Code \|\| Fmt2 == SF_Code) ? SF_Code : SF_String;
		666	}
		667
		668	StringRef getValue() const { return Value; }
		669	StringFormat getFormat() const { return Format; }
		670	bool hasCodeFormat() const { return Format == SF_Code; }
		671
		672	Init convertInitializerTo(RecTy Ty) const override;
		673
		674	bool isConcrete() const override { return true; }
		675
		676	std::string getAsString() const override {
		677	if (Format == SF_String)
		678	return "\"" + Value.str() + "\"";
		679	else
		680	return "[{" + Value.str() + "}]";
		681	}
		682
		683	std::string getAsUnquotedString() const override {
		684	return std::string(Value);
		685	}
		686
		687	Init *getBit(unsigned Bit) const override {
		688	llvm_unreachable("Illegal bit reference off string");
		689	}
		690	};
		691
		692	/// [AL, AH, CL] - Represent a list of defs
		693	///
		694	class ListInit final : public TypedInit, public FoldingSetNode,
		695	public TrailingObjects<ListInit, Init *> {
		696	unsigned NumValues;
		697
		698	public:
		699	using const_iterator = Init const ;
		700
		701	private:
		702	explicit ListInit(unsigned N, RecTy *EltTy)
		703	: TypedInit(IK_ListInit, ListRecTy::get(EltTy)), NumValues(N) {}
		704
		705	public:
		706	ListInit(const ListInit &) = delete;
		707	ListInit &operator=(const ListInit &) = delete;
		708
		709	// Do not use sized deallocation due to trailing objects.
		710	void operator delete(void *p) { ::operator delete(p); }
		711
		712	static bool classof(const Init *I) {
		713	return I->getKind() == IK_ListInit;
		714	}
		715	static ListInit get(ArrayRef<Init > Range, RecTy *EltTy);
		716
		717	void Profile(FoldingSetNodeID &ID) const;
		718
		719	Init *getElement(unsigned i) const {
		720	assert(i < NumValues && "List element index out of range!");
		721	return getTrailingObjects<Init *>()[i];
		722	}
		723	RecTy *getElementType() const {
		724	return cast<ListRecTy>(getType())->getElementType();
		725	}
		726
		727	Record *getElementAsRecord(unsigned i) const;
		728
		729	Init *convertInitListSlice(ArrayRef<unsigned> Elements) const override;
		730
		731	Init convertInitializerTo(RecTy Ty) const override;
		732
		733	/// This method is used by classes that refer to other
		734	/// variables which may not be defined at the time they expression is formed.
		735	/// If a value is set for the variable later, this method will be called on
		736	/// users of the value to allow the value to propagate out.
		737	///
		738	Init *resolveReferences(Resolver &R) const override;
		739
		740	bool isComplete() const override;
		741	bool isConcrete() const override;
		742	std::string getAsString() const override;
		743
		744	ArrayRef<Init*> getValues() const {
		745	return ArrayRef(getTrailingObjects<Init *>(), NumValues);
		746	}
		747
		748	const_iterator begin() const { return getTrailingObjects<Init *>(); }
		749	const_iterator end () const { return begin() + NumValues; }
		750
		751	size_t size () const { return NumValues; }
		752	bool empty() const { return NumValues == 0; }
		753
		754	Init *getBit(unsigned Bit) const override {
		755	llvm_unreachable("Illegal bit reference off list");
		756	}
		757	};
		758
		759	/// Base class for operators
		760	///
		761	class OpInit : public TypedInit {
		762	protected:
		763	explicit OpInit(InitKind K, RecTy *Type, uint8_t Opc)
		764	: TypedInit(K, Type, Opc) {}
		765
		766	public:
		767	OpInit(const OpInit &) = delete;
		768	OpInit &operator=(OpInit &) = delete;
		769
		770	static bool classof(const Init *I) {
		771	return I->getKind() >= IK_FirstOpInit &&
		772	I->getKind() <= IK_LastOpInit;
		773	}
		774
		775	// Clone - Clone this operator, replacing arguments with the new list
		776	virtual OpInit clone(ArrayRef<Init > Operands) const = 0;
		777
		778	virtual unsigned getNumOperands() const = 0;
		779	virtual Init *getOperand(unsigned i) const = 0;
		780
		781	Init *getBit(unsigned Bit) const override;
		782	};
		783
		784	/// !op (X) - Transform an init.
		785	///
		786	class UnOpInit : public OpInit, public FoldingSetNode {
		787	public:
		788	enum UnaryOp : uint8_t { CAST, NOT, HEAD, TAIL, SIZE, EMPTY, GETDAGOP, LOG2 };
		789
		790	private:
		791	Init *LHS;
		792
		793	UnOpInit(UnaryOp opc, Init lhs, RecTy Type)
		794	: OpInit(IK_UnOpInit, Type, opc), LHS(lhs) {}
		795
		796	public:
		797	UnOpInit(const UnOpInit &) = delete;
		798	UnOpInit &operator=(const UnOpInit &) = delete;
		799
		800	static bool classof(const Init *I) {
		801	return I->getKind() == IK_UnOpInit;
		802	}
		803
		804	static UnOpInit get(UnaryOp opc, Init lhs, RecTy *Type);
		805
		806	void Profile(FoldingSetNodeID &ID) const;
		807
		808	// Clone - Clone this operator, replacing arguments with the new list
		809	OpInit clone(ArrayRef<Init > Operands) const override {
		810	assert(Operands.size() == 1 &&
		811	"Wrong number of operands for unary operation");
		812	return UnOpInit::get(getOpcode(), *Operands.begin(), getType());
		813	}
		814
		815	unsigned getNumOperands() const override { return 1; }
		816
		817	Init *getOperand(unsigned i) const override {
		818	assert(i == 0 && "Invalid operand id for unary operator");
		819	return getOperand();
		820	}
		821
		822	UnaryOp getOpcode() const { return (UnaryOp)Opc; }
		823	Init *getOperand() const { return LHS; }
		824
		825	// Fold - If possible, fold this to a simpler init. Return this if not
		826	// possible to fold.
		827	Init Fold(Record CurRec, bool IsFinal = false) const;
		828
		829	Init *resolveReferences(Resolver &R) const override;
		830
		831	std::string getAsString() const override;
		832	};
		833
		834	/// !op (X, Y) - Combine two inits.
		835	class BinOpInit : public OpInit, public FoldingSetNode {
		836	public:
		837	enum BinaryOp : uint8_t {
		838	ADD,
		839	SUB,
		840	MUL,
		841	DIV,
		842	AND,
		843	OR,
		844	XOR,
		845	SHL,
		846	SRA,
		847	SRL,
		848	LISTCONCAT,
		849	LISTSPLAT,
		850	LISTREMOVE,
		851	STRCONCAT,
		852	INTERLEAVE,
		853	CONCAT,
		854	EQ,
		855	NE,
		856	LE,
		857	LT,
		858	GE,
		859	GT,
		860	SETDAGOP
		861	};
		862
		863	private:
		864	Init LHS, RHS;
		865
		866	BinOpInit(BinaryOp opc, Init lhs, Init rhs, RecTy *Type) :
		867	OpInit(IK_BinOpInit, Type, opc), LHS(lhs), RHS(rhs) {}
		868
		869	public:
		870	BinOpInit(const BinOpInit &) = delete;
		871	BinOpInit &operator=(const BinOpInit &) = delete;
		872
		873	static bool classof(const Init *I) {
		874	return I->getKind() == IK_BinOpInit;
		875	}
		876
		877	static BinOpInit get(BinaryOp opc, Init lhs, Init *rhs,
		878	RecTy *Type);
		879	static Init getStrConcat(Init lhs, Init *rhs);
		880	static Init getListConcat(TypedInit lhs, Init *rhs);
		881
		882	void Profile(FoldingSetNodeID &ID) const;
		883
		884	// Clone - Clone this operator, replacing arguments with the new list
		885	OpInit clone(ArrayRef<Init > Operands) const override {
		886	assert(Operands.size() == 2 &&
		887	"Wrong number of operands for binary operation");
		888	return BinOpInit::get(getOpcode(), Operands[0], Operands[1], getType());
		889	}
		890
		891	unsigned getNumOperands() const override { return 2; }
		892	Init *getOperand(unsigned i) const override {
		893	switch (i) {
		894	default: llvm_unreachable("Invalid operand id for binary operator");
		895	case 0: return getLHS();
		896	case 1: return getRHS();
		897	}
		898	}
		899
		900	BinaryOp getOpcode() const { return (BinaryOp)Opc; }
		901	Init *getLHS() const { return LHS; }
		902	Init *getRHS() const { return RHS; }
		903
		904	std::optional<bool> CompareInit(unsigned Opc, Init LHS, Init RHS) const;
		905
		906	// Fold - If possible, fold this to a simpler init. Return this if not
		907	// possible to fold.
		908	Init Fold(Record CurRec) const;
		909
		910	Init *resolveReferences(Resolver &R) const override;
		911
		912	std::string getAsString() const override;
		913	};
		914
		915	/// !op (X, Y, Z) - Combine two inits.
		916	class TernOpInit : public OpInit, public FoldingSetNode {
		917	public:
		918	enum TernaryOp : uint8_t { SUBST, FOREACH, FILTER, IF, DAG, SUBSTR, FIND };
		919
		920	private:
		921	Init LHS, MHS, *RHS;
		922
		923	TernOpInit(TernaryOp opc, Init lhs, Init mhs, Init *rhs,
		924	RecTy *Type) :
		925	OpInit(IK_TernOpInit, Type, opc), LHS(lhs), MHS(mhs), RHS(rhs) {}
		926
		927	public:
		928	TernOpInit(const TernOpInit &) = delete;
		929	TernOpInit &operator=(const TernOpInit &) = delete;
		930
		931	static bool classof(const Init *I) {
		932	return I->getKind() == IK_TernOpInit;
		933	}
		934
		935	static TernOpInit get(TernaryOp opc, Init lhs,
		936	Init mhs, Init rhs,
		937	RecTy *Type);
		938
		939	void Profile(FoldingSetNodeID &ID) const;
		940
		941	// Clone - Clone this operator, replacing arguments with the new list
		942	OpInit clone(ArrayRef<Init > Operands) const override {
		943	assert(Operands.size() == 3 &&
		944	"Wrong number of operands for ternary operation");
		945	return TernOpInit::get(getOpcode(), Operands[0], Operands[1], Operands[2],
		946	getType());
		947	}
		948
		949	unsigned getNumOperands() const override { return 3; }
		950	Init *getOperand(unsigned i) const override {
		951	switch (i) {
		952	default: llvm_unreachable("Invalid operand id for ternary operator");
		953	case 0: return getLHS();
		954	case 1: return getMHS();
		955	case 2: return getRHS();
		956	}
		957	}
		958
		959	TernaryOp getOpcode() const { return (TernaryOp)Opc; }
		960	Init *getLHS() const { return LHS; }
		961	Init *getMHS() const { return MHS; }
		962	Init *getRHS() const { return RHS; }
		963
		964	// Fold - If possible, fold this to a simpler init. Return this if not
		965	// possible to fold.
		966	Init Fold(Record CurRec) const;
		967
		968	bool isComplete() const override {
		969	return LHS->isComplete() && MHS->isComplete() && RHS->isComplete();
		970	}
		971
		972	Init *resolveReferences(Resolver &R) const override;
		973
		974	std::string getAsString() const override;
		975	};
		976
		977	/// !cond(condition_1: value1, ... , condition_n: value)
		978	/// Selects the first value for which condition is true.
		979	/// Otherwise reports an error.
		980	class CondOpInit final : public TypedInit, public FoldingSetNode,
		981	public TrailingObjects<CondOpInit, Init *> {
		982	unsigned NumConds;
		983	RecTy *ValType;
		984
		985	CondOpInit(unsigned NC, RecTy *Type)
		986	: TypedInit(IK_CondOpInit, Type),
		987	NumConds(NC), ValType(Type) {}
		988
		989	size_t numTrailingObjects(OverloadToken<Init *>) const {
		990	return 2*NumConds;
		991	}
		992
		993	public:
		994	CondOpInit(const CondOpInit &) = delete;
		995	CondOpInit &operator=(const CondOpInit &) = delete;
		996
		997	static bool classof(const Init *I) {
		998	return I->getKind() == IK_CondOpInit;
		999	}
		1000
		1001	static CondOpInit get(ArrayRef<Init> C, ArrayRef<Init*> V,
		1002	RecTy *Type);
		1003
		1004	void Profile(FoldingSetNodeID &ID) const;
		1005
		1006	RecTy *getValType() const { return ValType; }
		1007
		1008	unsigned getNumConds() const { return NumConds; }
		1009
		1010	Init *getCond(unsigned Num) const {
		1011	assert(Num < NumConds && "Condition number out of range!");
		1012	return getTrailingObjects<Init *>()[Num];
		1013	}
		1014
		1015	Init *getVal(unsigned Num) const {
		1016	assert(Num < NumConds && "Val number out of range!");
		1017	return getTrailingObjects<Init *>()[Num+NumConds];
		1018	}
		1019
		1020	ArrayRef<Init *> getConds() const {
		1021	return ArrayRef(getTrailingObjects<Init *>(), NumConds);
		1022	}
		1023
		1024	ArrayRef<Init *> getVals() const {
		1025	return ArrayRef(getTrailingObjects<Init *>() + NumConds, NumConds);
		1026	}
		1027
		1028	Init Fold(Record CurRec) const;
		1029
		1030	Init *resolveReferences(Resolver &R) const override;
		1031
		1032	bool isConcrete() const override;
		1033	bool isComplete() const override;
		1034	std::string getAsString() const override;
		1035
		1036	using const_case_iterator = SmallVectorImpl<Init*>::const_iterator;
		1037	using const_val_iterator = SmallVectorImpl<Init*>::const_iterator;
		1038
		1039	inline const_case_iterator arg_begin() const { return getConds().begin(); }
		1040	inline const_case_iterator arg_end () const { return getConds().end(); }
		1041
		1042	inline size_t case_size () const { return NumConds; }
		1043	inline bool case_empty() const { return NumConds == 0; }
		1044
		1045	inline const_val_iterator name_begin() const { return getVals().begin();}
		1046	inline const_val_iterator name_end () const { return getVals().end(); }
		1047
		1048	inline size_t val_size () const { return NumConds; }
		1049	inline bool val_empty() const { return NumConds == 0; }
		1050
		1051	Init *getBit(unsigned Bit) const override;
		1052	};
		1053
		1054	/// !foldl (a, b, expr, start, lst) - Fold over a list.
		1055	class FoldOpInit : public TypedInit, public FoldingSetNode {
		1056	private:
		1057	Init *Start;
		1058	Init *List;
		1059	Init *A;
		1060	Init *B;
		1061	Init *Expr;
		1062
		1063	FoldOpInit(Init Start, Init List, Init A, Init B, Init Expr, RecTy Type)
		1064	: TypedInit(IK_FoldOpInit, Type), Start(Start), List(List), A(A), B(B),
		1065	Expr(Expr) {}
		1066
		1067	public:
		1068	FoldOpInit(const FoldOpInit &) = delete;
		1069	FoldOpInit &operator=(const FoldOpInit &) = delete;
		1070
		1071	static bool classof(const Init *I) { return I->getKind() == IK_FoldOpInit; }
		1072
		1073	static FoldOpInit get(Init Start, Init List, Init A, Init B, Init Expr,
		1074	RecTy *Type);
		1075
		1076	void Profile(FoldingSetNodeID &ID) const;
		1077
		1078	// Fold - If possible, fold this to a simpler init. Return this if not
		1079	// possible to fold.
		1080	Init Fold(Record CurRec) const;
		1081
		1082	bool isComplete() const override { return false; }
		1083
		1084	Init *resolveReferences(Resolver &R) const override;
		1085
		1086	Init *getBit(unsigned Bit) const override;
		1087
		1088	std::string getAsString() const override;
		1089	};
		1090
		1091	/// !isa<type>(expr) - Dynamically determine the type of an expression.
		1092	class IsAOpInit : public TypedInit, public FoldingSetNode {
		1093	private:
		1094	RecTy *CheckType;
		1095	Init *Expr;
		1096
		1097	IsAOpInit(RecTy CheckType, Init Expr)
		1098	: TypedInit(IK_IsAOpInit, IntRecTy::get(CheckType->getRecordKeeper())),
		1099	CheckType(CheckType), Expr(Expr) {}
		1100
		1101	public:
		1102	IsAOpInit(const IsAOpInit &) = delete;
		1103	IsAOpInit &operator=(const IsAOpInit &) = delete;
		1104
		1105	static bool classof(const Init *I) { return I->getKind() == IK_IsAOpInit; }
		1106
		1107	static IsAOpInit get(RecTy CheckType, Init *Expr);
		1108
		1109	void Profile(FoldingSetNodeID &ID) const;
		1110
		1111	// Fold - If possible, fold this to a simpler init. Return this if not
		1112	// possible to fold.
		1113	Init *Fold() const;
		1114
		1115	bool isComplete() const override { return false; }
		1116
		1117	Init *resolveReferences(Resolver &R) const override;
		1118
		1119	Init *getBit(unsigned Bit) const override;
		1120
		1121	std::string getAsString() const override;
		1122	};
		1123
		1124	/// !exists<type>(expr) - Dynamically determine if a record of `type` named
		1125	/// `expr` exists.
		1126	class ExistsOpInit : public TypedInit, public FoldingSetNode {
		1127	private:
		1128	RecTy *CheckType;
		1129	Init *Expr;
		1130
		1131	ExistsOpInit(RecTy CheckType, Init Expr)
		1132	: TypedInit(IK_ExistsOpInit, IntRecTy::get(CheckType->getRecordKeeper())),
		1133	CheckType(CheckType), Expr(Expr) {}
		1134
		1135	public:
		1136	ExistsOpInit(const ExistsOpInit &) = delete;
		1137	ExistsOpInit &operator=(const ExistsOpInit &) = delete;
		1138
		1139	static bool classof(const Init *I) { return I->getKind() == IK_ExistsOpInit; }
		1140
		1141	static ExistsOpInit get(RecTy CheckType, Init *Expr);
		1142
		1143	void Profile(FoldingSetNodeID &ID) const;
		1144
		1145	// Fold - If possible, fold this to a simpler init. Return this if not
		1146	// possible to fold.
		1147	Init Fold(Record CurRec, bool IsFinal = false) const;
		1148
		1149	bool isComplete() const override { return false; }
		1150
		1151	Init *resolveReferences(Resolver &R) const override;
		1152
		1153	Init *getBit(unsigned Bit) const override;
		1154
		1155	std::string getAsString() const override;
		1156	};
		1157
		1158	/// 'Opcode' - Represent a reference to an entire variable object.
		1159	class VarInit : public TypedInit {
		1160	Init *VarName;
		1161
		1162	explicit VarInit(Init VN, RecTy T)
		1163	: TypedInit(IK_VarInit, T), VarName(VN) {}
		1164
		1165	public:
		1166	VarInit(const VarInit &) = delete;
		1167	VarInit &operator=(const VarInit &) = delete;
		1168
		1169	static bool classof(const Init *I) {
		1170	return I->getKind() == IK_VarInit;
		1171	}
		1172
		1173	static VarInit get(StringRef VN, RecTy T);
		1174	static VarInit get(Init VN, RecTy *T);
		1175
		1176	StringRef getName() const;
		1177	Init *getNameInit() const { return VarName; }
		1178
		1179	std::string getNameInitAsString() const {
		1180	return getNameInit()->getAsUnquotedString();
		1181	}
		1182
		1183	/// This method is used by classes that refer to other
		1184	/// variables which may not be defined at the time they expression is formed.
		1185	/// If a value is set for the variable later, this method will be called on
		1186	/// users of the value to allow the value to propagate out.
		1187	///
		1188	Init *resolveReferences(Resolver &R) const override;
		1189
		1190	Init *getBit(unsigned Bit) const override;
		1191
		1192	std::string getAsString() const override { return std::string(getName()); }
		1193	};
		1194
		1195	/// Opcode{0} - Represent access to one bit of a variable or field.
		1196	class VarBitInit final : public TypedInit {
		1197	TypedInit *TI;
		1198	unsigned Bit;
		1199
		1200	VarBitInit(TypedInit *T, unsigned B)
		1201	: TypedInit(IK_VarBitInit, BitRecTy::get(T->getRecordKeeper())), TI(T),
		1202	Bit(B) {
		1203	assert(T->getType() &&
		1204	(isa<IntRecTy>(T->getType()) \|\|
		1205	(isa<BitsRecTy>(T->getType()) &&
		1206	cast<BitsRecTy>(T->getType())->getNumBits() > B)) &&
		1207	"Illegal VarBitInit expression!");
		1208	}
		1209
		1210	public:
		1211	VarBitInit(const VarBitInit &) = delete;
		1212	VarBitInit &operator=(const VarBitInit &) = delete;
		1213
		1214	static bool classof(const Init *I) {
		1215	return I->getKind() == IK_VarBitInit;
		1216	}
		1217
		1218	static VarBitInit get(TypedInit T, unsigned B);
		1219
		1220	Init *getBitVar() const { return TI; }
		1221	unsigned getBitNum() const { return Bit; }
		1222
		1223	std::string getAsString() const override;
		1224	Init *resolveReferences(Resolver &R) const override;
		1225
		1226	Init *getBit(unsigned B) const override {
		1227	assert(B < 1 && "Bit index out of range!");
		1228	return const_cast<VarBitInit*>(this);
		1229	}
		1230	};
		1231
		1232	/// List[4] - Represent access to one element of a var or
		1233	/// field.
		1234	class VarListElementInit : public TypedInit {
		1235	TypedInit *TI;
		1236	unsigned Element;
		1237
		1238	VarListElementInit(TypedInit *T, unsigned E)
		1239	: TypedInit(IK_VarListElementInit,
		1240	cast<ListRecTy>(T->getType())->getElementType()),
		1241	TI(T), Element(E) {
		1242	assert(T->getType() && isa<ListRecTy>(T->getType()) &&
		1243	"Illegal VarBitInit expression!");
		1244	}
		1245
		1246	public:
		1247	VarListElementInit(const VarListElementInit &) = delete;
		1248	VarListElementInit &operator=(const VarListElementInit &) = delete;
		1249
		1250	static bool classof(const Init *I) {
		1251	return I->getKind() == IK_VarListElementInit;
		1252	}
		1253
		1254	static VarListElementInit get(TypedInit T, unsigned E);
		1255
		1256	TypedInit *getVariable() const { return TI; }
		1257	unsigned getElementNum() const { return Element; }
		1258
		1259	std::string getAsString() const override;
		1260	Init *resolveReferences(Resolver &R) const override;
		1261
		1262	Init *getBit(unsigned Bit) const override;
		1263	};
		1264
		1265	/// AL - Represent a reference to a 'def' in the description
		1266	class DefInit : public TypedInit {
		1267	friend class Record;
		1268
		1269	Record *Def;
		1270
		1271	explicit DefInit(Record *D);
		1272
		1273	public:
		1274	DefInit(const DefInit &) = delete;
		1275	DefInit &operator=(const DefInit &) = delete;
		1276
		1277	static bool classof(const Init *I) {
		1278	return I->getKind() == IK_DefInit;
		1279	}
		1280
		1281	static DefInit get(Record);
		1282
		1283	Init convertInitializerTo(RecTy Ty) const override;
		1284
		1285	Record *getDef() const { return Def; }
		1286
		1287	//virtual Init *convertInitializerBitRange(ArrayRef<unsigned> Bits);
		1288
		1289	RecTy getFieldType(StringInit FieldName) const override;
		1290
		1291	bool isConcrete() const override { return true; }
		1292	std::string getAsString() const override;
		1293
		1294	Init *getBit(unsigned Bit) const override {
		1295	llvm_unreachable("Illegal bit reference off def");
		1296	}
		1297	};
		1298
		1299	/// classname<targs...> - Represent an uninstantiated anonymous class
		1300	/// instantiation.
		1301	class VarDefInit final : public TypedInit, public FoldingSetNode,
		1302	public TrailingObjects<VarDefInit, Init *> {
		1303	Record *Class;
		1304	DefInit *Def = nullptr; // after instantiation
		1305	unsigned NumArgs;
		1306
		1307	explicit VarDefInit(Record *Class, unsigned N);
		1308
		1309	DefInit *instantiate();
		1310
		1311	public:
		1312	VarDefInit(const VarDefInit &) = delete;
		1313	VarDefInit &operator=(const VarDefInit &) = delete;
		1314
		1315	// Do not use sized deallocation due to trailing objects.
		1316	void operator delete(void *p) { ::operator delete(p); }
		1317
		1318	static bool classof(const Init *I) {
		1319	return I->getKind() == IK_VarDefInit;
		1320	}
		1321	static VarDefInit get(Record Class, ArrayRef<Init *> Args);
		1322
		1323	void Profile(FoldingSetNodeID &ID) const;
		1324
		1325	Init *resolveReferences(Resolver &R) const override;
		1326	Init *Fold() const;
		1327
		1328	std::string getAsString() const override;
		1329
		1330	Init *getArg(unsigned i) const {
		1331	assert(i < NumArgs && "Argument index out of range!");
		1332	return getTrailingObjects<Init *>()[i];
		1333	}
		1334
		1335	using const_iterator = Init const ;
		1336
		1337	const_iterator args_begin() const { return getTrailingObjects<Init *>(); }
		1338	const_iterator args_end () const { return args_begin() + NumArgs; }
		1339
		1340	size_t args_size () const { return NumArgs; }
		1341	bool args_empty() const { return NumArgs == 0; }
		1342
		1343	ArrayRef<Init *> args() const { return ArrayRef(args_begin(), NumArgs); }
		1344
		1345	Init *getBit(unsigned Bit) const override {
		1346	llvm_unreachable("Illegal bit reference off anonymous def");
		1347	}
		1348	};
		1349
		1350	/// X.Y - Represent a reference to a subfield of a variable
		1351	class FieldInit : public TypedInit {
		1352	Init *Rec; // Record we are referring to
		1353	StringInit *FieldName; // Field we are accessing
		1354
		1355	FieldInit(Init R, StringInit FN)
		1356	: TypedInit(IK_FieldInit, R->getFieldType(FN)), Rec(R), FieldName(FN) {
		1357	#ifndef NDEBUG
		1358	if (!getType()) {
		1359	llvm::errs() << "In Record = " << Rec->getAsString()
		1360	<< ", got FieldName = " << *FieldName
		1361	<< " with non-record type!\n";
		1362	llvm_unreachable("FieldInit with non-record type!");
		1363	}
		1364	#endif
		1365	}
		1366
		1367	public:
		1368	FieldInit(const FieldInit &) = delete;
		1369	FieldInit &operator=(const FieldInit &) = delete;
		1370
		1371	static bool classof(const Init *I) {
		1372	return I->getKind() == IK_FieldInit;
		1373	}
		1374
		1375	static FieldInit get(Init R, StringInit *FN);
		1376
		1377	Init *getRecord() const { return Rec; }
		1378	StringInit *getFieldName() const { return FieldName; }
		1379
		1380	Init *getBit(unsigned Bit) const override;
		1381
		1382	Init *resolveReferences(Resolver &R) const override;
		1383	Init Fold(Record CurRec) const;
		1384
		1385	bool isConcrete() const override;
		1386	std::string getAsString() const override {
		1387	return Rec->getAsString() + "." + FieldName->getValue().str();
		1388	}
		1389	};
		1390
		1391	/// (v a, b) - Represent a DAG tree value. DAG inits are required
		1392	/// to have at least one value then a (possibly empty) list of arguments. Each
		1393	/// argument can have a name associated with it.
		1394	class DagInit final : public TypedInit, public FoldingSetNode,
		1395	public TrailingObjects<DagInit, Init , StringInit > {
		1396	friend TrailingObjects;
		1397
		1398	Init *Val;
		1399	StringInit *ValName;
		1400	unsigned NumArgs;
		1401	unsigned NumArgNames;
		1402
		1403	DagInit(Init V, StringInit VN, unsigned NumArgs, unsigned NumArgNames)
		1404	: TypedInit(IK_DagInit, DagRecTy::get(V->getRecordKeeper())), Val(V),
		1405	ValName(VN), NumArgs(NumArgs), NumArgNames(NumArgNames) {}
		1406
		1407	size_t numTrailingObjects(OverloadToken<Init *>) const { return NumArgs; }
		1408
		1409	public:
		1410	DagInit(const DagInit &) = delete;
		1411	DagInit &operator=(const DagInit &) = delete;
		1412
		1413	static bool classof(const Init *I) {
		1414	return I->getKind() == IK_DagInit;
		1415	}
		1416
		1417	static DagInit get(Init V, StringInit VN, ArrayRef<Init > ArgRange,
		1418	ArrayRef<StringInit*> NameRange);
		1419	static DagInit get(Init V, StringInit *VN,
		1420	ArrayRef<std::pair<Init, StringInit>> Args);
		1421
		1422	void Profile(FoldingSetNodeID &ID) const;
		1423
		1424	Init *getOperator() const { return Val; }
		1425	Record *getOperatorAsDef(ArrayRef<SMLoc> Loc) const;
		1426
		1427	StringInit *getName() const { return ValName; }
		1428
		1429	StringRef getNameStr() const {
		1430	return ValName ? ValName->getValue() : StringRef();
		1431	}
		1432
		1433	unsigned getNumArgs() const { return NumArgs; }
		1434
		1435	Init *getArg(unsigned Num) const {
		1436	assert(Num < NumArgs && "Arg number out of range!");
		1437	return getTrailingObjects<Init *>()[Num];
		1438	}
		1439
		1440	StringInit *getArgName(unsigned Num) const {
		1441	assert(Num < NumArgNames && "Arg number out of range!");
		1442	return getTrailingObjects<StringInit *>()[Num];
		1443	}
		1444
		1445	StringRef getArgNameStr(unsigned Num) const {
		1446	StringInit *Init = getArgName(Num);
		1447	return Init ? Init->getValue() : StringRef();
		1448	}
		1449
		1450	ArrayRef<Init *> getArgs() const {
		1451	return ArrayRef(getTrailingObjects<Init *>(), NumArgs);
		1452	}
		1453
		1454	ArrayRef<StringInit *> getArgNames() const {
		1455	return ArrayRef(getTrailingObjects<StringInit *>(), NumArgNames);
		1456	}
		1457
		1458	Init *resolveReferences(Resolver &R) const override;
		1459
		1460	bool isConcrete() const override;
		1461	std::string getAsString() const override;
		1462
		1463	using const_arg_iterator = SmallVectorImpl<Init*>::const_iterator;
		1464	using const_name_iterator = SmallVectorImpl<StringInit*>::const_iterator;
		1465
		1466	inline const_arg_iterator arg_begin() const { return getArgs().begin(); }
		1467	inline const_arg_iterator arg_end () const { return getArgs().end(); }
		1468
		1469	inline size_t arg_size () const { return NumArgs; }
		1470	inline bool arg_empty() const { return NumArgs == 0; }
		1471
		1472	inline const_name_iterator name_begin() const { return getArgNames().begin();}
		1473	inline const_name_iterator name_end () const { return getArgNames().end(); }
		1474
		1475	inline size_t name_size () const { return NumArgNames; }
		1476	inline bool name_empty() const { return NumArgNames == 0; }
		1477
		1478	Init *getBit(unsigned Bit) const override {
		1479	llvm_unreachable("Illegal bit reference off dag");
		1480	}
		1481	};
		1482
		1483	//===----------------------------------------------------------------------===//
		1484	// High-Level Classes
		1485	//===----------------------------------------------------------------------===//
		1486
		1487	/// This class represents a field in a record, including its name, type,
		1488	/// value, and source location.
		1489	class RecordVal {
		1490	friend class Record;
		1491
		1492	public:
		1493	enum FieldKind {
		1494	FK_Normal, // A normal record field.
		1495	FK_NonconcreteOK, // A field that can be nonconcrete ('field' keyword).
		1496	FK_TemplateArg, // A template argument.
		1497	};
		1498
		1499	private:
		1500	Init *Name;
		1501	SMLoc Loc; // Source location of definition of name.
		1502	PointerIntPair<RecTy *, 2, FieldKind> TyAndKind;
		1503	Init *Value;
		1504	bool IsUsed = false;
		1505
		1506	/// Reference locations to this record value.
		1507	SmallVector<SMRange> ReferenceLocs;
		1508
		1509	public:
		1510	RecordVal(Init N, RecTy T, FieldKind K);
		1511	RecordVal(Init N, SMLoc Loc, RecTy T, FieldKind K);
		1512
		1513	/// Get the record keeper used to unique this value.
		1514	RecordKeeper &getRecordKeeper() const { return Name->getRecordKeeper(); }
		1515
		1516	/// Get the name of the field as a StringRef.
		1517	StringRef getName() const;
		1518
		1519	/// Get the name of the field as an Init.
		1520	Init *getNameInit() const { return Name; }
		1521
		1522	/// Get the name of the field as a std::string.
		1523	std::string getNameInitAsString() const {
		1524	return getNameInit()->getAsUnquotedString();
		1525	}
		1526
		1527	/// Get the source location of the point where the field was defined.
		1528	const SMLoc &getLoc() const { return Loc; }
		1529
		1530	/// Is this a field where nonconcrete values are okay?
		1531	bool isNonconcreteOK() const {
		1532	return TyAndKind.getInt() == FK_NonconcreteOK;
		1533	}
		1534
		1535	/// Is this a template argument?
		1536	bool isTemplateArg() const {
		1537	return TyAndKind.getInt() == FK_TemplateArg;
		1538	}
		1539
		1540	/// Get the type of the field value as a RecTy.
		1541	RecTy *getType() const { return TyAndKind.getPointer(); }
		1542
		1543	/// Get the type of the field for printing purposes.
		1544	std::string getPrintType() const;
		1545
		1546	/// Get the value of the field as an Init.
		1547	Init *getValue() const { return Value; }
		1548
		1549	/// Set the value of the field from an Init.
		1550	bool setValue(Init *V);
		1551
		1552	/// Set the value and source location of the field.
		1553	bool setValue(Init *V, SMLoc NewLoc);
		1554
		1555	/// Add a reference to this record value.
		1556	void addReferenceLoc(SMRange Loc) { ReferenceLocs.push_back(Loc); }
		1557
		1558	/// Return the references of this record value.
		1559	ArrayRef<SMRange> getReferenceLocs() const { return ReferenceLocs; }
		1560
		1561	/// Whether this value is used. Useful for reporting warnings, for example
		1562	/// when a template argument is unused.
		1563	void setUsed(bool Used) { IsUsed = Used; }
		1564	bool isUsed() const { return IsUsed; }
		1565
		1566	void dump() const;
		1567
		1568	/// Print the value to an output stream, possibly with a semicolon.
		1569	void print(raw_ostream &OS, bool PrintSem = true) const;
		1570	};
		1571
		1572	inline raw_ostream &operator<<(raw_ostream &OS, const RecordVal &RV) {
		1573	RV.print(OS << " ");
		1574	return OS;
		1575	}
		1576
		1577	class Record {
		1578	public:
		1579	struct AssertionInfo {
		1580	SMLoc Loc;
		1581	Init *Condition;
		1582	Init *Message;
		1583
		1584	// User-defined constructor to support std::make_unique(). It can be
		1585	// removed in C++20 when braced initialization is supported.
		1586	AssertionInfo(SMLoc Loc, Init Condition, Init Message)
		1587	: Loc(Loc), Condition(Condition), Message(Message) {}
		1588	};
		1589
		1590	private:
		1591	Init *Name;
		1592	// Location where record was instantiated, followed by the location of
		1593	// multiclass prototypes used, and finally by the locations of references to
		1594	// this record.
		1595	SmallVector<SMLoc, 4> Locs;
		1596	SmallVector<SMLoc, 0> ForwardDeclarationLocs;
		1597	SmallVector<SMRange, 0> ReferenceLocs;
		1598	SmallVector<Init *, 0> TemplateArgs;
		1599	SmallVector<RecordVal, 0> Values;
		1600	SmallVector<AssertionInfo, 0> Assertions;
		1601
		1602	// All superclasses in the inheritance forest in post-order (yes, it
		1603	// must be a forest; diamond-shaped inheritance is not allowed).
		1604	SmallVector<std::pair<Record *, SMRange>, 0> SuperClasses;
		1605
		1606	// Tracks Record instances. Not owned by Record.
		1607	RecordKeeper &TrackedRecords;
		1608
		1609	// The DefInit corresponding to this record.
		1610	DefInit *CorrespondingDefInit = nullptr;
		1611
		1612	// Unique record ID.
		1613	unsigned ID;
		1614
		1615	bool IsAnonymous;
		1616	bool IsClass;
		1617
		1618	void checkName();
		1619
		1620	public:
		1621	// Constructs a record.
		1622	explicit Record(Init *N, ArrayRef<SMLoc> locs, RecordKeeper &records,
		1623	bool Anonymous = false, bool Class = false)
		1624	: Name(N), Locs(locs.begin(), locs.end()), TrackedRecords(records),
		1625	ID(getNewUID(N->getRecordKeeper())), IsAnonymous(Anonymous),
		1626	IsClass(Class) {
		1627	checkName();
		1628	}
		1629
		1630	explicit Record(StringRef N, ArrayRef<SMLoc> locs, RecordKeeper &records,
		1631	bool Class = false)
		1632	: Record(StringInit::get(records, N), locs, records, false, Class) {}
		1633
		1634	// When copy-constructing a Record, we must still guarantee a globally unique
		1635	// ID number. Don't copy CorrespondingDefInit either, since it's owned by the
		1636	// original record. All other fields can be copied normally.
		1637	Record(const Record &O)
		1638	: Name(O.Name), Locs(O.Locs), TemplateArgs(O.TemplateArgs),
		1639	Values(O.Values), Assertions(O.Assertions),
		1640	SuperClasses(O.SuperClasses), TrackedRecords(O.TrackedRecords),
		1641	ID(getNewUID(O.getRecords())), IsAnonymous(O.IsAnonymous),
		1642	IsClass(O.IsClass) {}
		1643
		1644	static unsigned getNewUID(RecordKeeper &RK);
		1645
		1646	unsigned getID() const { return ID; }
		1647
		1648	StringRef getName() const { return cast<StringInit>(Name)->getValue(); }
		1649
		1650	Init *getNameInit() const {
		1651	return Name;
		1652	}
		1653
		1654	std::string getNameInitAsString() const {
		1655	return getNameInit()->getAsUnquotedString();
		1656	}
		1657
		1658	void setName(Init *Name); // Also updates RecordKeeper.
		1659
		1660	ArrayRef<SMLoc> getLoc() const { return Locs; }
		1661	void appendLoc(SMLoc Loc) { Locs.push_back(Loc); }
		1662
		1663	ArrayRef<SMLoc> getForwardDeclarationLocs() const {
		1664	return ForwardDeclarationLocs;
		1665	}
		1666
		1667	/// Add a reference to this record value.
		1668	void appendReferenceLoc(SMRange Loc) { ReferenceLocs.push_back(Loc); }
		1669
		1670	/// Return the references of this record value.
		1671	ArrayRef<SMRange> getReferenceLocs() const { return ReferenceLocs; }
		1672
		1673	// Update a class location when encountering a (re-)definition.
		1674	void updateClassLoc(SMLoc Loc);
		1675
		1676	// Make the type that this record should have based on its superclasses.
		1677	RecordRecTy *getType();
		1678
		1679	/// get the corresponding DefInit.
		1680	DefInit *getDefInit();
		1681
		1682	bool isClass() const { return IsClass; }
		1683
		1684	ArrayRef<Init *> getTemplateArgs() const {
		1685	return TemplateArgs;
		1686	}
		1687
		1688	ArrayRef<RecordVal> getValues() const { return Values; }
		1689
		1690	ArrayRef<AssertionInfo> getAssertions() const { return Assertions; }
		1691
		1692	ArrayRef<std::pair<Record *, SMRange>> getSuperClasses() const {
		1693	return SuperClasses;
		1694	}
		1695
		1696	/// Determine whether this record has the specified direct superclass.
		1697	bool hasDirectSuperClass(const Record *SuperClass) const;
		1698
		1699	/// Append the direct superclasses of this record to Classes.
		1700	void getDirectSuperClasses(SmallVectorImpl<Record *> &Classes) const;
		1701
		1702	bool isTemplateArg(Init *Name) const {
		1703	return llvm::is_contained(TemplateArgs, Name);
		1704	}
		1705
		1706	const RecordVal getValue(const Init Name) const {
		1707	for (const RecordVal &Val : Values)
		1708	if (Val.Name == Name) return &Val;
		1709	return nullptr;
		1710	}
		1711
		1712	const RecordVal *getValue(StringRef Name) const {
		1713	return getValue(StringInit::get(getRecords(), Name));
		1714	}
		1715
		1716	RecordVal getValue(const Init Name) {
		1717	return const_cast<RecordVal >(static_cast<const Record >(this)->getValue(Name));
		1718	}
		1719
		1720	RecordVal *getValue(StringRef Name) {
		1721	return const_cast<RecordVal >(static_cast<const Record >(this)->getValue(Name));
		1722	}
		1723
		1724	void addTemplateArg(Init *Name) {
		1725	assert(!isTemplateArg(Name) && "Template arg already defined!");
		1726	TemplateArgs.push_back(Name);
		1727	}
		1728
		1729	void addValue(const RecordVal &RV) {
		1730	assert(getValue(RV.getNameInit()) == nullptr && "Value already added!");
		1731	Values.push_back(RV);
		1732	}
		1733
		1734	void removeValue(Init *Name) {
		1735	for (unsigned i = 0, e = Values.size(); i != e; ++i)
		1736	if (Values[i].getNameInit() == Name) {
		1737	Values.erase(Values.begin()+i);
		1738	return;
		1739	}
		1740	llvm_unreachable("Cannot remove an entry that does not exist!");
		1741	}
		1742
		1743	void removeValue(StringRef Name) {
		1744	removeValue(StringInit::get(getRecords(), Name));
		1745	}
		1746
		1747	void addAssertion(SMLoc Loc, Init Condition, Init Message) {
		1748	Assertions.push_back(AssertionInfo(Loc, Condition, Message));
		1749	}
		1750
		1751	void appendAssertions(const Record *Rec) {
		1752	Assertions.append(Rec->Assertions);
		1753	}
		1754
		1755	void checkRecordAssertions();
		1756	void checkUnusedTemplateArgs();
		1757
		1758	bool isSubClassOf(const Record *R) const {
		1759	for (const auto &SCPair : SuperClasses)
		1760	if (SCPair.first == R)
		1761	return true;
		1762	return false;
		1763	}
		1764
		1765	bool isSubClassOf(StringRef Name) const {
		1766	for (const auto &SCPair : SuperClasses) {
		1767	if (const auto *SI = dyn_cast<StringInit>(SCPair.first->getNameInit())) {
		1768	if (SI->getValue() == Name)
		1769	return true;
		1770	} else if (SCPair.first->getNameInitAsString() == Name) {
		1771	return true;
		1772	}
		1773	}
		1774	return false;
		1775	}
		1776
		1777	void addSuperClass(Record *R, SMRange Range) {
		1778	assert(!CorrespondingDefInit &&
		1779	"changing type of record after it has been referenced");
		1780	assert(!isSubClassOf(R) && "Already subclassing record!");
		1781	SuperClasses.push_back(std::make_pair(R, Range));
		1782	}
		1783
		1784	/// If there are any field references that refer to fields that have been
		1785	/// filled in, we can propagate the values now.
		1786	///
		1787	/// This is a final resolve: any error messages, e.g. due to undefined !cast
		1788	/// references, are generated now.
		1789	void resolveReferences(Init *NewName = nullptr);
		1790
		1791	/// Apply the resolver to the name of the record as well as to the
		1792	/// initializers of all fields of the record except SkipVal.
		1793	///
		1794	/// The resolver should not resolve any of the fields itself, to avoid
		1795	/// recursion / infinite loops.
		1796	void resolveReferences(Resolver &R, const RecordVal *SkipVal = nullptr);
		1797
		1798	RecordKeeper &getRecords() const {
		1799	return TrackedRecords;
		1800	}
		1801
		1802	bool isAnonymous() const {
		1803	return IsAnonymous;
		1804	}
		1805
		1806	void dump() const;
		1807
		1808	//===--------------------------------------------------------------------===//
		1809	// High-level methods useful to tablegen back-ends
		1810	//
		1811
		1812	/// Return the source location for the named field.
		1813	SMLoc getFieldLoc(StringRef FieldName) const;
		1814
		1815	/// Return the initializer for a value with the specified name, or throw an
		1816	/// exception if the field does not exist.
		1817	Init *getValueInit(StringRef FieldName) const;
		1818
		1819	/// Return true if the named field is unset.
		1820	bool isValueUnset(StringRef FieldName) const {
		1821	return isa<UnsetInit>(getValueInit(FieldName));
		1822	}
		1823
		1824	/// This method looks up the specified field and returns its value as a
		1825	/// string, throwing an exception if the field does not exist or if the value
		1826	/// is not a string.
		1827	StringRef getValueAsString(StringRef FieldName) const;
		1828
		1829	/// This method looks up the specified field and returns its value as a
		1830	/// string, throwing an exception if the value is not a string and
		1831	/// llvm::Optional() if the field does not exist.
		1832	std::optional<StringRef> getValueAsOptionalString(StringRef FieldName) const;
		1833
		1834	/// This method looks up the specified field and returns its value as a
		1835	/// BitsInit, throwing an exception if the field does not exist or if the
		1836	/// value is not the right type.
		1837	BitsInit *getValueAsBitsInit(StringRef FieldName) const;
		1838
		1839	/// This method looks up the specified field and returns its value as a
		1840	/// ListInit, throwing an exception if the field does not exist or if the
		1841	/// value is not the right type.
		1842	ListInit *getValueAsListInit(StringRef FieldName) const;
		1843
		1844	/// This method looks up the specified field and returns its value as a
		1845	/// vector of records, throwing an exception if the field does not exist or
		1846	/// if the value is not the right type.
		1847	std::vector<Record*> getValueAsListOfDefs(StringRef FieldName) const;
		1848
		1849	/// This method looks up the specified field and returns its value as a
		1850	/// vector of integers, throwing an exception if the field does not exist or
		1851	/// if the value is not the right type.
		1852	std::vector<int64_t> getValueAsListOfInts(StringRef FieldName) const;
		1853
		1854	/// This method looks up the specified field and returns its value as a
		1855	/// vector of strings, throwing an exception if the field does not exist or
		1856	/// if the value is not the right type.
		1857	std::vector<StringRef> getValueAsListOfStrings(StringRef FieldName) const;
		1858
		1859	/// This method looks up the specified field and returns its value as a
		1860	/// Record, throwing an exception if the field does not exist or if the value
		1861	/// is not the right type.
		1862	Record *getValueAsDef(StringRef FieldName) const;
		1863
		1864	/// This method looks up the specified field and returns its value as a
		1865	/// Record, returning null if the field exists but is "uninitialized" (i.e.
		1866	/// set to `?`), and throwing an exception if the field does not exist or if
		1867	/// its value is not the right type.
		1868	Record *getValueAsOptionalDef(StringRef FieldName) const;
		1869
		1870	/// This method looks up the specified field and returns its value as a bit,
		1871	/// throwing an exception if the field does not exist or if the value is not
		1872	/// the right type.
		1873	bool getValueAsBit(StringRef FieldName) const;
		1874
		1875	/// This method looks up the specified field and returns its value as a bit.
		1876	/// If the field is unset, sets Unset to true and returns false.
		1877	bool getValueAsBitOrUnset(StringRef FieldName, bool &Unset) const;
		1878
		1879	/// This method looks up the specified field and returns its value as an
		1880	/// int64_t, throwing an exception if the field does not exist or if the
		1881	/// value is not the right type.
		1882	int64_t getValueAsInt(StringRef FieldName) const;
		1883
		1884	/// This method looks up the specified field and returns its value as an Dag,
		1885	/// throwing an exception if the field does not exist or if the value is not
		1886	/// the right type.
		1887	DagInit *getValueAsDag(StringRef FieldName) const;
		1888	};
		1889
		1890	raw_ostream &operator<<(raw_ostream &OS, const Record &R);
		1891
		1892	class RecordKeeper {
		1893	using RecordMap = std::map<std::string, std::unique_ptr<Record>, std::less<>>;
		1894	using GlobalMap = std::map<std::string, Init *, std::less<>>;
		1895
		1896	public:
		1897	RecordKeeper();
		1898	~RecordKeeper();
		1899
		1900	/// Return the internal implementation of the RecordKeeper.
		1901	detail::RecordKeeperImpl &getImpl() { return *Impl; }
		1902
		1903	/// Get the main TableGen input file's name.
		1904	const std::string getInputFilename() const { return InputFilename; }
		1905
		1906	/// Get the map of classes.
		1907	const RecordMap &getClasses() const { return Classes; }
		1908
		1909	/// Get the map of records (defs).
		1910	const RecordMap &getDefs() const { return Defs; }
		1911
		1912	/// Get the map of global variables.
		1913	const GlobalMap &getGlobals() const { return ExtraGlobals; }
		1914
		1915	/// Get the class with the specified name.
		1916	Record *getClass(StringRef Name) const {
		1917	auto I = Classes.find(Name);
		1918	return I == Classes.end() ? nullptr : I->second.get();
		1919	}
		1920
		1921	/// Get the concrete record with the specified name.
		1922	Record *getDef(StringRef Name) const {
		1923	auto I = Defs.find(Name);
		1924	return I == Defs.end() ? nullptr : I->second.get();
		1925	}
		1926
		1927	/// Get the \p Init value of the specified global variable.
		1928	Init *getGlobal(StringRef Name) const {
		1929	if (Record *R = getDef(Name))
		1930	return R->getDefInit();
		1931	auto It = ExtraGlobals.find(Name);
		1932	return It == ExtraGlobals.end() ? nullptr : It->second;
		1933	}
		1934
		1935	void saveInputFilename(std::string Filename) {
		1936	InputFilename = Filename;
		1937	}
		1938
		1939	void addClass(std::unique_ptr<Record> R) {
		1940	bool Ins = Classes.insert(std::make_pair(std::string(R->getName()),
		1941	std::move(R))).second;
		1942	(void)Ins;
		1943	assert(Ins && "Class already exists");
		1944	}
		1945
		1946	void addDef(std::unique_ptr<Record> R) {
		1947	bool Ins = Defs.insert(std::make_pair(std::string(R->getName()),
		1948	std::move(R))).second;
		1949	(void)Ins;
		1950	assert(Ins && "Record already exists");
		1951	}
		1952
		1953	void addExtraGlobal(StringRef Name, Init *I) {
		1954	bool Ins = ExtraGlobals.insert(std::make_pair(std::string(Name), I)).second;
		1955	(void)Ins;
		1956	assert(!getDef(Name));
		1957	assert(Ins && "Global already exists");
		1958	}
		1959
		1960	Init *getNewAnonymousName();
		1961
		1962	/// Start phase timing; called if the --time-phases option is specified.
		1963	void startPhaseTiming() {
		1964	TimingGroup = new TimerGroup("TableGen", "TableGen Phase Timing");
		1965	}
		1966
		1967	/// Start timing a phase. Automatically stops any previous phase timer.
		1968	void startTimer(StringRef Name);
		1969
		1970	/// Stop timing a phase.
		1971	void stopTimer();
		1972
		1973	/// Start timing the overall backend. If the backend itself starts a timer,
		1974	/// then this timer is cleared.
		1975	void startBackendTimer(StringRef Name);
		1976
		1977	/// Stop timing the overall backend.
		1978	void stopBackendTimer();
		1979
		1980	/// Stop phase timing and print the report.
		1981	void stopPhaseTiming() {
		1982	if (TimingGroup)
		1983	delete TimingGroup;
		1984	}
		1985
		1986	//===--------------------------------------------------------------------===//
		1987	// High-level helper methods, useful for tablegen backends.
		1988
		1989	/// Get all the concrete records that inherit from the one specified
		1990	/// class. The class must be defined.
		1991	std::vector<Record *> getAllDerivedDefinitions(StringRef ClassName) const;
		1992
		1993	/// Get all the concrete records that inherit from all the specified
		1994	/// classes. The classes must be defined.
		1995	std::vector<Record *> getAllDerivedDefinitions(
		1996	ArrayRef<StringRef> ClassNames) const;
		1997
		1998	/// Get all the concrete records that inherit from specified class, if the
		1999	/// class is defined. Returns an empty vector if the class is not defined.
		2000	std::vector<Record *>
		2001	getAllDerivedDefinitionsIfDefined(StringRef ClassName) const;
		2002
		2003	void dump() const;
		2004
		2005	private:
		2006	RecordKeeper(RecordKeeper &&) = delete;
		2007	RecordKeeper(const RecordKeeper &) = delete;
		2008	RecordKeeper &operator=(RecordKeeper &&) = delete;
		2009	RecordKeeper &operator=(const RecordKeeper &) = delete;
		2010
		2011	std::string InputFilename;
		2012	RecordMap Classes, Defs;
		2013	mutable StringMap<std::vector<Record *>> ClassRecordsMap;
		2014	GlobalMap ExtraGlobals;
		2015
		2016	// These members are for the phase timing feature. We need a timer group,
		2017	// the last timer started, and a flag to say whether the last timer
		2018	// is the special "backend overall timer."
		2019	TimerGroup *TimingGroup = nullptr;
		2020	Timer *LastTimer = nullptr;
		2021	bool BackendTimer = false;
		2022
		2023	/// The internal uniquer implementation of the RecordKeeper.
		2024	std::unique_ptr<detail::RecordKeeperImpl> Impl;
		2025	};
		2026
		2027	/// Sorting predicate to sort record pointers by name.
		2028	struct LessRecord {
		2029	bool operator()(const Record Rec1, const Record Rec2) const {
		2030	return StringRef(Rec1->getName()).compare_numeric(Rec2->getName()) < 0;
		2031	}
		2032	};
		2033
		2034	/// Sorting predicate to sort record pointers by their
		2035	/// unique ID. If you just need a deterministic order, use this, since it
		2036	/// just compares two `unsigned`; the other sorting predicates require
		2037	/// string manipulation.
		2038	struct LessRecordByID {
		2039	bool operator()(const Record LHS, const Record RHS) const {
		2040	return LHS->getID() < RHS->getID();
		2041	}
		2042	};
		2043
		2044	/// Sorting predicate to sort record pointers by their
		2045	/// name field.
		2046	struct LessRecordFieldName {
		2047	bool operator()(const Record Rec1, const Record Rec2) const {
		2048	return Rec1->getValueAsString("Name") < Rec2->getValueAsString("Name");
		2049	}
		2050	};
		2051
		2052	struct LessRecordRegister {
		2053	struct RecordParts {
		2054	SmallVector<std::pair< bool, StringRef>, 4> Parts;
		2055
		2056	RecordParts(StringRef Rec) {
		2057	if (Rec.empty())
		2058	return;
		2059
		2060	size_t Len = 0;
		2061	const char *Start = Rec.data();
		2062	const char *Curr = Start;
		2063	bool IsDigitPart = isDigit(Curr[0]);
		2064	for (size_t I = 0, E = Rec.size(); I != E; ++I, ++Len) {
		2065	bool IsDigit = isDigit(Curr[I]);
		2066	if (IsDigit != IsDigitPart) {
		2067	Parts.push_back(std::make_pair(IsDigitPart, StringRef(Start, Len)));
		2068	Len = 0;
		2069	Start = &Curr[I];
		2070	IsDigitPart = isDigit(Curr[I]);
		2071	}
		2072	}
		2073	// Push the last part.
		2074	Parts.push_back(std::make_pair(IsDigitPart, StringRef(Start, Len)));
		2075	}
		2076
		2077	size_t size() { return Parts.size(); }
		2078
		2079	std::pair<bool, StringRef> getPart(size_t i) {
		2080	assert (i < Parts.size() && "Invalid idx!");
		2081	return Parts[i];
		2082	}
		2083	};
		2084
		2085	bool operator()(const Record Rec1, const Record Rec2) const {
		2086	RecordParts LHSParts(StringRef(Rec1->getName()));
		2087	RecordParts RHSParts(StringRef(Rec2->getName()));
		2088
		2089	size_t LHSNumParts = LHSParts.size();
		2090	size_t RHSNumParts = RHSParts.size();
		2091	assert (LHSNumParts && RHSNumParts && "Expected at least one part!");
		2092
		2093	if (LHSNumParts != RHSNumParts)
		2094	return LHSNumParts < RHSNumParts;
		2095
		2096	// We expect the registers to be of the form [_a-zA-Z]+([0-9][_a-zA-Z])*.
		2097	for (size_t I = 0, E = LHSNumParts; I < E; I+=2) {
		2098	std::pair<bool, StringRef> LHSPart = LHSParts.getPart(I);
		2099	std::pair<bool, StringRef> RHSPart = RHSParts.getPart(I);
		2100	// Expect even part to always be alpha.
		2101	assert (LHSPart.first == false && RHSPart.first == false &&
		2102	"Expected both parts to be alpha.");
		2103	if (int Res = LHSPart.second.compare(RHSPart.second))
		2104	return Res < 0;
		2105	}
		2106	for (size_t I = 1, E = LHSNumParts; I < E; I+=2) {
		2107	std::pair<bool, StringRef> LHSPart = LHSParts.getPart(I);
		2108	std::pair<bool, StringRef> RHSPart = RHSParts.getPart(I);
		2109	// Expect odd part to always be numeric.
		2110	assert (LHSPart.first == true && RHSPart.first == true &&
		2111	"Expected both parts to be numeric.");
		2112	if (LHSPart.second.size() != RHSPart.second.size())
		2113	return LHSPart.second.size() < RHSPart.second.size();
		2114
		2115	unsigned LHSVal, RHSVal;
		2116
		2117	bool LHSFailed = LHSPart.second.getAsInteger(10, LHSVal); (void)LHSFailed;
		2118	assert(!LHSFailed && "Unable to convert LHS to integer.");
		2119	bool RHSFailed = RHSPart.second.getAsInteger(10, RHSVal); (void)RHSFailed;
		2120	assert(!RHSFailed && "Unable to convert RHS to integer.");
		2121
		2122	if (LHSVal != RHSVal)
		2123	return LHSVal < RHSVal;
		2124	}
		2125	return LHSNumParts < RHSNumParts;
		2126	}
		2127	};
		2128
		2129	raw_ostream &operator<<(raw_ostream &OS, const RecordKeeper &RK);
		2130
		2131	//===----------------------------------------------------------------------===//
		2132	// Resolvers
		2133	//===----------------------------------------------------------------------===//
		2134
		2135	/// Interface for looking up the initializer for a variable name, used by
		2136	/// Init::resolveReferences.
		2137	class Resolver {
		2138	Record *CurRec;
		2139	bool IsFinal = false;
		2140
		2141	public:
		2142	explicit Resolver(Record *CurRec) : CurRec(CurRec) {}
		2143	virtual ~Resolver() = default;
		2144
		2145	Record *getCurrentRecord() const { return CurRec; }
		2146
		2147	/// Return the initializer for the given variable name (should normally be a
		2148	/// StringInit), or nullptr if the name could not be resolved.
		2149	virtual Init resolve(Init VarName) = 0;
		2150
		2151	// Whether bits in a BitsInit should stay unresolved if resolving them would
		2152	// result in a ? (UnsetInit). This behavior is used to represent instruction
		2153	// encodings by keeping references to unset variables within a record.
		2154	virtual bool keepUnsetBits() const { return false; }
		2155
		2156	// Whether this is the final resolve step before adding a record to the
		2157	// RecordKeeper. Error reporting during resolve and related constant folding
		2158	// should only happen when this is true.
		2159	bool isFinal() const { return IsFinal; }
		2160
		2161	void setFinal(bool Final) { IsFinal = Final; }
		2162	};
		2163
		2164	/// Resolve arbitrary mappings.
		2165	class MapResolver final : public Resolver {
		2166	struct MappedValue {
		2167	Init *V;
		2168	bool Resolved;
		2169
		2170	MappedValue() : V(nullptr), Resolved(false) {}
		2171	MappedValue(Init *V, bool Resolved) : V(V), Resolved(Resolved) {}
		2172	};
		2173
		2174	DenseMap<Init *, MappedValue> Map;
		2175
		2176	public:
		2177	explicit MapResolver(Record *CurRec = nullptr) : Resolver(CurRec) {}
		2178
		2179	void set(Init Key, Init Value) { Map[Key] = {Value, false}; }
		2180
		2181	bool isComplete(Init *VarName) const {
		2182	auto It = Map.find(VarName);
		2183	assert(It != Map.end() && "key must be present in map");
		2184	return It->second.V->isComplete();
		2185	}
		2186
		2187	Init resolve(Init VarName) override;
		2188	};
		2189
		2190	/// Resolve all variables from a record except for unset variables.
		2191	class RecordResolver final : public Resolver {
		2192	DenseMap<Init , Init > Cache;
		2193	SmallVector<Init *, 4> Stack;
		2194	Init *Name = nullptr;
		2195
		2196	public:
		2197	explicit RecordResolver(Record &R) : Resolver(&R) {}
		2198
		2199	void setName(Init *NewName) { Name = NewName; }
		2200
		2201	Init resolve(Init VarName) override;
		2202
		2203	bool keepUnsetBits() const override { return true; }
		2204	};
		2205
		2206	/// Delegate resolving to a sub-resolver, but shadow some variable names.
		2207	class ShadowResolver final : public Resolver {
		2208	Resolver &R;
		2209	DenseSet<Init *> Shadowed;
		2210
		2211	public:
		2212	explicit ShadowResolver(Resolver &R)
		2213	: Resolver(R.getCurrentRecord()), R(R) {
		2214	setFinal(R.isFinal());
		2215	}
		2216
		2217	void addShadow(Init *Key) { Shadowed.insert(Key); }
		2218
		2219	Init resolve(Init VarName) override {
		2220	if (Shadowed.count(VarName))
		2221	return nullptr;
		2222	return R.resolve(VarName);
		2223	}
		2224	};
		2225
		2226	/// (Optionally) delegate resolving to a sub-resolver, and keep track whether
		2227	/// there were unresolved references.
		2228	class TrackUnresolvedResolver final : public Resolver {
		2229	Resolver *R;
		2230	bool FoundUnresolved = false;
		2231
		2232	public:
		2233	explicit TrackUnresolvedResolver(Resolver *R = nullptr)
		2234	: Resolver(R ? R->getCurrentRecord() : nullptr), R(R) {}
		2235
		2236	bool foundUnresolved() const { return FoundUnresolved; }
		2237
		2238	Init resolve(Init VarName) override;
		2239	};
		2240
		2241	/// Do not resolve anything, but keep track of whether a given variable was
		2242	/// referenced.
		2243	class HasReferenceResolver final : public Resolver {
		2244	Init *VarNameToTrack;
		2245	bool Found = false;
		2246
		2247	public:
		2248	explicit HasReferenceResolver(Init *VarNameToTrack)
		2249	: Resolver(nullptr), VarNameToTrack(VarNameToTrack) {}
		2250
		2251	bool found() const { return Found; }
		2252
		2253	Init resolve(Init VarName) override;
		2254	};
		2255
		2256	void EmitDetailedRecords(RecordKeeper &RK, raw_ostream &OS);
		2257	void EmitJSON(RecordKeeper &RK, raw_ostream &OS);
		2258
		2259	} // end namespace llvm
		2260
		2261	#endif // LLVM_TABLEGEN_RECORD_H

Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

QNX 8.QNX8 LLVM/Clang compiler suite/llvm-build/x86_64/include/llvm/TableGen/Record.h – Rev 14