[llvm] [NFC][TableGen][GlobalISel] Move MIR pattern parsing out of combiner (PR #86789)
via llvm-commits
llvm-commits at lists.llvm.org
Wed Mar 27 04:16:23 PDT 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-llvm-globalisel
Author: Pierre van Houtryve (Pierre-vh)
<details>
<summary>Changes</summary>
Reland of cfa0833ccc7450a322e709583e894e4c96ce682e
---
Patch is 42.24 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/86789.diff
6 Files Affected:
- (modified) llvm/utils/TableGen/Common/CMakeLists.txt (+2)
- (added) llvm/utils/TableGen/Common/GlobalISel/CombinerUtils.cpp (+23)
- (modified) llvm/utils/TableGen/Common/GlobalISel/CombinerUtils.h (+4)
- (added) llvm/utils/TableGen/Common/GlobalISel/PatternParser.cpp (+462)
- (added) llvm/utils/TableGen/Common/GlobalISel/PatternParser.h (+118)
- (modified) llvm/utils/TableGen/GlobalISelCombinerEmitter.cpp (+14-465)
``````````diff
diff --git a/llvm/utils/TableGen/Common/CMakeLists.txt b/llvm/utils/TableGen/Common/CMakeLists.txt
index 0440f027f28659..c31ed5a1de690c 100644
--- a/llvm/utils/TableGen/Common/CMakeLists.txt
+++ b/llvm/utils/TableGen/Common/CMakeLists.txt
@@ -12,10 +12,12 @@ set(LLVM_LINK_COMPONENTS
add_llvm_library(LLVMTableGenCommon STATIC OBJECT EXCLUDE_FROM_ALL
GlobalISel/CodeExpander.cpp
+ GlobalISel/CombinerUtils.cpp
GlobalISel/CXXPredicates.cpp
GlobalISel/GlobalISelMatchTable.cpp
GlobalISel/GlobalISelMatchTableExecutorEmitter.cpp
GlobalISel/MatchDataInfo.cpp
+ GlobalISel/PatternParser.cpp
GlobalISel/Patterns.cpp
AsmWriterInst.cpp
diff --git a/llvm/utils/TableGen/Common/GlobalISel/CombinerUtils.cpp b/llvm/utils/TableGen/Common/GlobalISel/CombinerUtils.cpp
new file mode 100644
index 00000000000000..37e6306050951b
--- /dev/null
+++ b/llvm/utils/TableGen/Common/GlobalISel/CombinerUtils.cpp
@@ -0,0 +1,23 @@
+//===- CombinerUtils.cpp --------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "CombinerUtils.h"
+#include "llvm/ADT/StringSet.h"
+
+namespace llvm {
+
+StringRef insertStrRef(StringRef S) {
+ if (S.empty())
+ return {};
+
+ static StringSet<> Pool;
+ auto [It, Inserted] = Pool.insert(S);
+ return It->getKey();
+}
+
+} // namespace llvm
diff --git a/llvm/utils/TableGen/Common/GlobalISel/CombinerUtils.h b/llvm/utils/TableGen/Common/GlobalISel/CombinerUtils.h
index 8cb2514a10e876..82a64c63edbde3 100644
--- a/llvm/utils/TableGen/Common/GlobalISel/CombinerUtils.h
+++ b/llvm/utils/TableGen/Common/GlobalISel/CombinerUtils.h
@@ -65,6 +65,10 @@ inline const DagInit *getDagWithOperatorOfSubClass(const Init &N,
return I;
return nullptr;
}
+
+/// Copies a StringRef into a static pool to preserve it.
+StringRef insertStrRef(StringRef S);
+
} // namespace llvm
#endif
diff --git a/llvm/utils/TableGen/Common/GlobalISel/PatternParser.cpp b/llvm/utils/TableGen/Common/GlobalISel/PatternParser.cpp
new file mode 100644
index 00000000000000..944b7efbacf5c9
--- /dev/null
+++ b/llvm/utils/TableGen/Common/GlobalISel/PatternParser.cpp
@@ -0,0 +1,462 @@
+//===- PatternParser.cpp ----------------------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "Common/GlobalISel/PatternParser.h"
+#include "Basic/CodeGenIntrinsics.h"
+#include "Common/CodeGenTarget.h"
+#include "Common/GlobalISel/CombinerUtils.h"
+#include "Common/GlobalISel/Patterns.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/SaveAndRestore.h"
+#include "llvm/TableGen/Error.h"
+#include "llvm/TableGen/Record.h"
+
+namespace llvm {
+namespace gi {
+static constexpr StringLiteral MIFlagsEnumClassName = "MIFlagEnum";
+
+namespace {
+class PrettyStackTraceParse : public PrettyStackTraceEntry {
+ const Record &Def;
+
+public:
+ PrettyStackTraceParse(const Record &Def) : Def(Def) {}
+
+ void print(raw_ostream &OS) const override {
+ if (Def.isSubClassOf("GICombineRule"))
+ OS << "Parsing GICombineRule '" << Def.getName() << "'";
+ else if (Def.isSubClassOf(PatFrag::ClassName))
+ OS << "Parsing " << PatFrag::ClassName << " '" << Def.getName() << "'";
+ else
+ OS << "Parsing '" << Def.getName() << "'";
+ OS << '\n';
+ }
+};
+} // namespace
+
+bool PatternParser::parsePatternList(
+ const DagInit &List,
+ function_ref<bool(std::unique_ptr<Pattern>)> ParseAction,
+ StringRef Operator, StringRef AnonPatNamePrefix) {
+ if (List.getOperatorAsDef(DiagLoc)->getName() != Operator) {
+ PrintError(DiagLoc, "Expected " + Operator + " operator");
+ return false;
+ }
+
+ if (List.getNumArgs() == 0) {
+ PrintError(DiagLoc, Operator + " pattern list is empty");
+ return false;
+ }
+
+ // The match section consists of a list of matchers and predicates. Parse each
+ // one and add the equivalent GIMatchDag nodes, predicates, and edges.
+ for (unsigned I = 0; I < List.getNumArgs(); ++I) {
+ Init *Arg = List.getArg(I);
+ std::string Name = List.getArgName(I)
+ ? List.getArgName(I)->getValue().str()
+ : ("__" + AnonPatNamePrefix + "_" + Twine(I)).str();
+
+ if (auto Pat = parseInstructionPattern(*Arg, Name)) {
+ if (!ParseAction(std::move(Pat)))
+ return false;
+ continue;
+ }
+
+ if (auto Pat = parseWipMatchOpcodeMatcher(*Arg, Name)) {
+ if (!ParseAction(std::move(Pat)))
+ return false;
+ continue;
+ }
+
+ // Parse arbitrary C++ code
+ if (const auto *StringI = dyn_cast<StringInit>(Arg)) {
+ auto CXXPat = std::make_unique<CXXPattern>(*StringI, insertStrRef(Name));
+ if (!ParseAction(std::move(CXXPat)))
+ return false;
+ continue;
+ }
+
+ PrintError(DiagLoc,
+ "Failed to parse pattern: '" + Arg->getAsString() + "'");
+ return false;
+ }
+
+ return true;
+}
+
+static const CodeGenInstruction &
+getInstrForIntrinsic(const CodeGenTarget &CGT, const CodeGenIntrinsic *I) {
+ StringRef Opc;
+ if (I->isConvergent) {
+ Opc = I->hasSideEffects ? "G_INTRINSIC_CONVERGENT_W_SIDE_EFFECTS"
+ : "G_INTRINSIC_CONVERGENT";
+ } else {
+ Opc = I->hasSideEffects ? "G_INTRINSIC_W_SIDE_EFFECTS" : "G_INTRINSIC";
+ }
+
+ RecordKeeper &RK = I->TheDef->getRecords();
+ return CGT.getInstruction(RK.getDef(Opc));
+}
+
+static const CodeGenIntrinsic *getCodeGenIntrinsic(Record *R) {
+ // Intrinsics need to have a static lifetime because the match table keeps
+ // references to CodeGenIntrinsic objects.
+ static DenseMap<const Record *, std::unique_ptr<CodeGenIntrinsic>>
+ AllIntrinsics;
+
+ auto &Ptr = AllIntrinsics[R];
+ if (!Ptr)
+ Ptr = std::make_unique<CodeGenIntrinsic>(R, std::vector<Record *>());
+ return Ptr.get();
+}
+
+std::unique_ptr<Pattern>
+PatternParser::parseInstructionPattern(const Init &Arg, StringRef Name) {
+ const DagInit *DagPat = dyn_cast<DagInit>(&Arg);
+ if (!DagPat)
+ return nullptr;
+
+ std::unique_ptr<InstructionPattern> Pat;
+ if (const DagInit *IP = getDagWithOperatorOfSubClass(Arg, "Instruction")) {
+ auto &Instr = CGT.getInstruction(IP->getOperatorAsDef(DiagLoc));
+ Pat =
+ std::make_unique<CodeGenInstructionPattern>(Instr, insertStrRef(Name));
+ } else if (const DagInit *IP =
+ getDagWithOperatorOfSubClass(Arg, "Intrinsic")) {
+ Record *TheDef = IP->getOperatorAsDef(DiagLoc);
+ const CodeGenIntrinsic *Intrin = getCodeGenIntrinsic(TheDef);
+ const CodeGenInstruction &Instr = getInstrForIntrinsic(CGT, Intrin);
+ Pat =
+ std::make_unique<CodeGenInstructionPattern>(Instr, insertStrRef(Name));
+ cast<CodeGenInstructionPattern>(*Pat).setIntrinsic(Intrin);
+ } else if (const DagInit *PFP =
+ getDagWithOperatorOfSubClass(Arg, PatFrag::ClassName)) {
+ const Record *Def = PFP->getOperatorAsDef(DiagLoc);
+ const PatFrag *PF = parsePatFrag(Def);
+ if (!PF)
+ return nullptr; // Already diagnosed by parsePatFrag
+ Pat = std::make_unique<PatFragPattern>(*PF, insertStrRef(Name));
+ } else if (const DagInit *BP =
+ getDagWithOperatorOfSubClass(Arg, BuiltinPattern::ClassName)) {
+ Pat = std::make_unique<BuiltinPattern>(*BP->getOperatorAsDef(DiagLoc),
+ insertStrRef(Name));
+ } else
+ return nullptr;
+
+ for (unsigned K = 0; K < DagPat->getNumArgs(); ++K) {
+ Init *Arg = DagPat->getArg(K);
+ if (auto *DagArg = getDagWithSpecificOperator(*Arg, "MIFlags")) {
+ if (!parseInstructionPatternMIFlags(*Pat, DagArg))
+ return nullptr;
+ continue;
+ }
+
+ if (!parseInstructionPatternOperand(*Pat, Arg, DagPat->getArgName(K)))
+ return nullptr;
+ }
+
+ if (!Pat->checkSemantics(DiagLoc))
+ return nullptr;
+
+ return std::move(Pat);
+}
+
+std::unique_ptr<Pattern>
+PatternParser::parseWipMatchOpcodeMatcher(const Init &Arg, StringRef Name) {
+ const DagInit *Matcher = getDagWithSpecificOperator(Arg, "wip_match_opcode");
+ if (!Matcher)
+ return nullptr;
+
+ if (Matcher->getNumArgs() == 0) {
+ PrintError(DiagLoc, "Empty wip_match_opcode");
+ return nullptr;
+ }
+
+ // Each argument is an opcode that can match.
+ auto Result = std::make_unique<AnyOpcodePattern>(insertStrRef(Name));
+ for (const auto &Arg : Matcher->getArgs()) {
+ Record *OpcodeDef = getDefOfSubClass(*Arg, "Instruction");
+ if (OpcodeDef) {
+ Result->addOpcode(&CGT.getInstruction(OpcodeDef));
+ continue;
+ }
+
+ PrintError(DiagLoc, "Arguments to wip_match_opcode must be instructions");
+ return nullptr;
+ }
+
+ return std::move(Result);
+}
+
+bool PatternParser::parseInstructionPatternOperand(InstructionPattern &IP,
+ const Init *OpInit,
+ const StringInit *OpName) {
+ const auto ParseErr = [&]() {
+ PrintError(DiagLoc,
+ "cannot parse operand '" + OpInit->getAsUnquotedString() + "' ");
+ if (OpName)
+ PrintNote(DiagLoc,
+ "operand name is '" + OpName->getAsUnquotedString() + "'");
+ return false;
+ };
+
+ // untyped immediate, e.g. 0
+ if (const auto *IntImm = dyn_cast<IntInit>(OpInit)) {
+ std::string Name = OpName ? OpName->getAsUnquotedString() : "";
+ IP.addOperand(IntImm->getValue(), insertStrRef(Name), PatternType());
+ return true;
+ }
+
+ // typed immediate, e.g. (i32 0)
+ if (const auto *DagOp = dyn_cast<DagInit>(OpInit)) {
+ if (DagOp->getNumArgs() != 1)
+ return ParseErr();
+
+ const Record *TyDef = DagOp->getOperatorAsDef(DiagLoc);
+ auto ImmTy = PatternType::get(DiagLoc, TyDef,
+ "cannot parse immediate '" +
+ DagOp->getAsUnquotedString() + "'");
+ if (!ImmTy)
+ return false;
+
+ if (!IP.hasAllDefs()) {
+ PrintError(DiagLoc, "out operand of '" + IP.getInstName() +
+ "' cannot be an immediate");
+ return false;
+ }
+
+ const auto *Val = dyn_cast<IntInit>(DagOp->getArg(0));
+ if (!Val)
+ return ParseErr();
+
+ std::string Name = OpName ? OpName->getAsUnquotedString() : "";
+ IP.addOperand(Val->getValue(), insertStrRef(Name), *ImmTy);
+ return true;
+ }
+
+ // Typed operand e.g. $x/$z in (G_FNEG $x, $z)
+ if (auto *DefI = dyn_cast<DefInit>(OpInit)) {
+ if (!OpName) {
+ PrintError(DiagLoc, "expected an operand name after '" +
+ OpInit->getAsString() + "'");
+ return false;
+ }
+ const Record *Def = DefI->getDef();
+ auto Ty = PatternType::get(DiagLoc, Def, "cannot parse operand type");
+ if (!Ty)
+ return false;
+ IP.addOperand(insertStrRef(OpName->getAsUnquotedString()), *Ty);
+ return true;
+ }
+
+ // Untyped operand e.g. $x/$z in (G_FNEG $x, $z)
+ if (isa<UnsetInit>(OpInit)) {
+ assert(OpName && "Unset w/ no OpName?");
+ IP.addOperand(insertStrRef(OpName->getAsUnquotedString()), PatternType());
+ return true;
+ }
+
+ return ParseErr();
+}
+
+bool PatternParser::parseInstructionPatternMIFlags(InstructionPattern &IP,
+ const DagInit *Op) {
+ auto *CGIP = dyn_cast<CodeGenInstructionPattern>(&IP);
+ if (!CGIP) {
+ PrintError(DiagLoc,
+ "matching/writing MIFlags is only allowed on CodeGenInstruction "
+ "patterns");
+ return false;
+ }
+
+ const auto CheckFlagEnum = [&](const Record *R) {
+ if (!R->isSubClassOf(MIFlagsEnumClassName)) {
+ PrintError(DiagLoc, "'" + R->getName() + "' is not a subclass of '" +
+ MIFlagsEnumClassName + "'");
+ return false;
+ }
+
+ return true;
+ };
+
+ if (CGIP->getMIFlagsInfo()) {
+ PrintError(DiagLoc, "MIFlags can only be present once on an instruction");
+ return false;
+ }
+
+ auto &FI = CGIP->getOrCreateMIFlagsInfo();
+ for (unsigned K = 0; K < Op->getNumArgs(); ++K) {
+ const Init *Arg = Op->getArg(K);
+
+ // Match/set a flag: (MIFlags FmNoNans)
+ if (const auto *Def = dyn_cast<DefInit>(Arg)) {
+ const Record *R = Def->getDef();
+ if (!CheckFlagEnum(R))
+ return false;
+
+ FI.addSetFlag(R);
+ continue;
+ }
+
+ // Do not match a flag/unset a flag: (MIFlags (not FmNoNans))
+ if (const DagInit *NotDag = getDagWithSpecificOperator(*Arg, "not")) {
+ for (const Init *NotArg : NotDag->getArgs()) {
+ const DefInit *DefArg = dyn_cast<DefInit>(NotArg);
+ if (!DefArg) {
+ PrintError(DiagLoc, "cannot parse '" + NotArg->getAsUnquotedString() +
+ "': expected a '" + MIFlagsEnumClassName +
+ "'");
+ return false;
+ }
+
+ const Record *R = DefArg->getDef();
+ if (!CheckFlagEnum(R))
+ return false;
+
+ FI.addUnsetFlag(R);
+ continue;
+ }
+
+ continue;
+ }
+
+ // Copy flags from a matched instruction: (MIFlags $mi)
+ if (isa<UnsetInit>(Arg)) {
+ FI.addCopyFlag(insertStrRef(Op->getArgName(K)->getAsUnquotedString()));
+ continue;
+ }
+ }
+
+ return true;
+}
+
+std::unique_ptr<PatFrag> PatternParser::parsePatFragImpl(const Record *Def) {
+ auto StackTrace = PrettyStackTraceParse(*Def);
+ if (!Def->isSubClassOf(PatFrag::ClassName))
+ return nullptr;
+
+ const DagInit *Ins = Def->getValueAsDag("InOperands");
+ if (Ins->getOperatorAsDef(Def->getLoc())->getName() != "ins") {
+ PrintError(Def, "expected 'ins' operator for " + PatFrag::ClassName +
+ " in operands list");
+ return nullptr;
+ }
+
+ const DagInit *Outs = Def->getValueAsDag("OutOperands");
+ if (Outs->getOperatorAsDef(Def->getLoc())->getName() != "outs") {
+ PrintError(Def, "expected 'outs' operator for " + PatFrag::ClassName +
+ " out operands list");
+ return nullptr;
+ }
+
+ auto Result = std::make_unique<PatFrag>(*Def);
+ if (!parsePatFragParamList(*Outs, [&](StringRef Name, unsigned Kind) {
+ Result->addOutParam(insertStrRef(Name), (PatFrag::ParamKind)Kind);
+ return true;
+ }))
+ return nullptr;
+
+ if (!parsePatFragParamList(*Ins, [&](StringRef Name, unsigned Kind) {
+ Result->addInParam(insertStrRef(Name), (PatFrag::ParamKind)Kind);
+ return true;
+ }))
+ return nullptr;
+
+ const ListInit *Alts = Def->getValueAsListInit("Alternatives");
+ unsigned AltIdx = 0;
+ for (const Init *Alt : *Alts) {
+ const auto *PatDag = dyn_cast<DagInit>(Alt);
+ if (!PatDag) {
+ PrintError(Def, "expected dag init for PatFrag pattern alternative");
+ return nullptr;
+ }
+
+ PatFrag::Alternative &A = Result->addAlternative();
+ const auto AddPat = [&](std::unique_ptr<Pattern> Pat) {
+ A.Pats.push_back(std::move(Pat));
+ return true;
+ };
+
+ SaveAndRestore<ArrayRef<SMLoc>> DiagLocSAR(DiagLoc, Def->getLoc());
+ if (!parsePatternList(
+ *PatDag, AddPat, "pattern",
+ /*AnonPatPrefix*/
+ (Def->getName() + "_alt" + Twine(AltIdx++) + "_pattern").str()))
+ return nullptr;
+ }
+
+ if (!Result->buildOperandsTables() || !Result->checkSemantics())
+ return nullptr;
+
+ return Result;
+}
+
+bool PatternParser::parsePatFragParamList(
+ const DagInit &OpsList,
+ function_ref<bool(StringRef, unsigned)> ParseAction) {
+ for (unsigned K = 0; K < OpsList.getNumArgs(); ++K) {
+ const StringInit *Name = OpsList.getArgName(K);
+ const Init *Ty = OpsList.getArg(K);
+
+ if (!Name) {
+ PrintError(DiagLoc, "all operands must be named'");
+ return false;
+ }
+ const std::string NameStr = Name->getAsUnquotedString();
+
+ PatFrag::ParamKind OpKind;
+ if (isSpecificDef(*Ty, "gi_imm"))
+ OpKind = PatFrag::PK_Imm;
+ else if (isSpecificDef(*Ty, "root"))
+ OpKind = PatFrag::PK_Root;
+ else if (isa<UnsetInit>(Ty) ||
+ isSpecificDef(*Ty, "gi_mo")) // no type = gi_mo.
+ OpKind = PatFrag::PK_MachineOperand;
+ else {
+ PrintError(
+ DiagLoc,
+ "'" + NameStr +
+ "' operand type was expected to be 'root', 'gi_imm' or 'gi_mo'");
+ return false;
+ }
+
+ if (!ParseAction(NameStr, (unsigned)OpKind))
+ return false;
+ }
+
+ return true;
+}
+
+const PatFrag *PatternParser::parsePatFrag(const Record *Def) {
+ // Cache already parsed PatFrags to avoid doing extra work.
+ static DenseMap<const Record *, std::unique_ptr<PatFrag>> ParsedPatFrags;
+
+ auto It = ParsedPatFrags.find(Def);
+ if (It != ParsedPatFrags.end()) {
+ SeenPatFrags.insert(It->second.get());
+ return It->second.get();
+ }
+
+ std::unique_ptr<PatFrag> NewPatFrag = parsePatFragImpl(Def);
+ if (!NewPatFrag) {
+ PrintError(Def, "Could not parse " + PatFrag::ClassName + " '" +
+ Def->getName() + "'");
+ // Put a nullptr in the map so we don't attempt parsing this again.
+ ParsedPatFrags[Def] = nullptr;
+ return nullptr;
+ }
+
+ const auto *Res = NewPatFrag.get();
+ ParsedPatFrags[Def] = std::move(NewPatFrag);
+ SeenPatFrags.insert(Res);
+ return Res;
+}
+
+} // namespace gi
+} // namespace llvm
diff --git a/llvm/utils/TableGen/Common/GlobalISel/PatternParser.h b/llvm/utils/TableGen/Common/GlobalISel/PatternParser.h
new file mode 100644
index 00000000000000..cd6f524075cdb9
--- /dev/null
+++ b/llvm/utils/TableGen/Common/GlobalISel/PatternParser.h
@@ -0,0 +1,118 @@
+//===- PatternParser.h ------------------------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file Contains tools to parse MIR patterns from TableGen DAG elements.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_UTILS_GLOBALISEL_PATTERNPARSER_H
+#define LLVM_UTILS_GLOBALISEL_PATTERNPARSER_H
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/STLFunctionalExtras.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/Support/SMLoc.h"
+#include <memory>
+
+namespace llvm {
+class CodeGenTarget;
+class DagInit;
+class Init;
+class Record;
+class StringRef;
+class StringInit;
+
+namespace gi {
+class InstructionPattern;
+class Pattern;
+class PatFrag;
+
+/// Helper class to parse MIR Pattern lists.
+///
+/// e.g., `(match (G_FADD $x, $y, $z), (G_FNEG $y, $z))`
+class PatternParser {
+ const CodeGenTarget &CGT;
+ ArrayRef<SMLoc> DiagLoc;
+
+ mutable SmallPtrSet<const PatFrag *, 2> SeenPatFrags;
+
+public:
+ PatternParser(const CodeGenTarget &CGT, ArrayRef<SMLoc> DiagLoc)
+ : CGT(CGT), DiagLoc(DiagLoc) {}
+
+ /// Parses a list of patterns such as:
+ /// (Operator (Pattern1 ...), (Pattern2 ...))
+ /// \param List DagInit of the expected pattern list.
+ /// \param ParseAction Callback to handle a succesfully parsed pattern.
+ /// \param Operator The name of the operator, e.g. "match"
+ /// \param AnonPatNamePrefix Prefix for anonymous pattern names.
+ /// \return true on success, false on failure.
+ bool
+ parsePatternList(const DagInit &List,
+ function_ref<bool(std::unique_ptr<Pattern>)> ParseAction,
+ StringRef Operator, StringRef AnonPatNamePrefix);
+
+ /// \returns all PatFrags encountered by this PatternParser.
+ const auto &getSeenPatFrags() const { return SeenPatFrags; }
+
+private:
+ /// Parse any InstructionPattern from a TableGen Init.
+ /// \param Arg Init to parse.
+ /// \param PatName Name of the pattern that will be parsed.
+ /// \return the parsed pattern on success, n...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/86789
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