[clang] [llvm] [clang] Introduce [[clang::lifetime_capture_by(X)]] (PR #111499)

Utkarsh Saxena via llvm-commits llvm-commits at lists.llvm.org
Sat Nov 9 23:35:23 PST 2024


https://github.com/usx95 updated https://github.com/llvm/llvm-project/pull/111499

>From 1aae3527ccba1eeaa8da4dd4309dcbdf590c4adf Mon Sep 17 00:00:00 2001
From: Sergei Barannikov <barannikov88 at gmail.com>
Date: Sun, 3 Nov 2024 20:37:26 +0300
Subject: [PATCH] [MC] Make generated `MCInstPrinter::getMnemonic` const (NFC)
 (#114682)

The value returned from the function depends only on the instruction opcode.

As a drive-by, change the type of the argument to const-reference.
---
 bolt/lib/Core/HashUtilities.cpp               |   2 +-
 clang/include/clang/Basic/Attr.td             |  40 +++++++
 .../clang/Basic/DiagnosticSemaKinds.td        |  15 +++
 clang/include/clang/Sema/Sema.h               |   7 ++
 clang/lib/AST/TypePrinter.cpp                 |   9 ++
 clang/lib/Sema/SemaDecl.cpp                   |   1 +
 clang/lib/Sema/SemaDeclAttr.cpp               | 103 ++++++++++++++++++
 .../test/SemaCXX/attr-lifetime-capture-by.cpp |  40 +++++++
 llvm/include/llvm/MC/MCInstPrinter.h          |   3 +-
 llvm/include/llvm/MC/MCStreamer.h             |   2 +-
 llvm/lib/MC/MCAsmStreamer.cpp                 |   4 +-
 .../AArch64/MCTargetDesc/AArch64InstPrinter.h |   6 +-
 .../AMDGPU/MCTargetDesc/AMDGPUInstPrinter.h   |   3 +-
 .../AMDGPU/MCTargetDesc/R600InstPrinter.h     |   3 +-
 .../Target/ARC/MCTargetDesc/ARCInstPrinter.h  |   3 +-
 .../Target/ARM/MCTargetDesc/ARMInstPrinter.h  |   3 +-
 .../Target/AVR/MCTargetDesc/AVRInstPrinter.h  |   3 +-
 .../Target/BPF/MCTargetDesc/BPFInstPrinter.h  |   3 +-
 .../CSKY/MCTargetDesc/CSKYInstPrinter.h       |   3 +-
 .../MCTargetDesc/DirectXMCTargetDesc.cpp      |   3 +-
 .../Hexagon/MCTargetDesc/HexagonInstPrinter.h |   3 +-
 .../Lanai/MCTargetDesc/LanaiInstPrinter.h     |   3 +-
 .../MCTargetDesc/LoongArchInstPrinter.h       |   3 +-
 .../M68k/MCTargetDesc/M68kInstPrinter.h       |   3 +-
 .../MSP430/MCTargetDesc/MSP430InstPrinter.h   |   3 +-
 .../Mips/MCTargetDesc/MipsInstPrinter.h       |   3 +-
 .../NVPTX/MCTargetDesc/NVPTXInstPrinter.h     |   3 +-
 .../PowerPC/MCTargetDesc/PPCInstPrinter.h     |   3 +-
 .../RISCV/MCTargetDesc/RISCVInstPrinter.h     |   3 +-
 .../SPIRV/MCTargetDesc/SPIRVInstPrinter.h     |   3 +-
 .../Sparc/MCTargetDesc/SparcInstPrinter.h     |   3 +-
 .../MCTargetDesc/SystemZGNUInstPrinter.h      |   3 +-
 .../MCTargetDesc/SystemZHLASMInstPrinter.h    |   3 +-
 .../Target/VE/MCTargetDesc/VEInstPrinter.h    |   3 +-
 .../MCTargetDesc/WebAssemblyInstPrinter.cpp   |   2 +-
 .../MCTargetDesc/WebAssemblyInstPrinter.h     |   3 +-
 .../X86/MCTargetDesc/X86ATTInstPrinter.h      |   3 +-
 .../X86/MCTargetDesc/X86IntelInstPrinter.h    |   3 +-
 .../XCore/MCTargetDesc/XCoreInstPrinter.h     |   3 +-
 .../Xtensa/MCTargetDesc/XtensaInstPrinter.h   |   3 +-
 llvm/utils/TableGen/AsmWriterEmitter.cpp      |   9 +-
 41 files changed, 285 insertions(+), 39 deletions(-)
 create mode 100644 clang/test/SemaCXX/attr-lifetime-capture-by.cpp

diff --git a/bolt/lib/Core/HashUtilities.cpp b/bolt/lib/Core/HashUtilities.cpp
index dfbbdb8a968fe6..6bdf30460f340b 100644
--- a/bolt/lib/Core/HashUtilities.cpp
+++ b/bolt/lib/Core/HashUtilities.cpp
@@ -145,7 +145,7 @@ std::string hashBlockLoose(BinaryContext &BC, const BinaryBasicBlock &BB) {
       continue;
     }
 
-    std::string Mnemonic = BC.InstPrinter->getMnemonic(&Inst).first;
+    std::string Mnemonic = BC.InstPrinter->getMnemonic(Inst).first;
     llvm::erase_if(Mnemonic, [](unsigned char ch) { return std::isspace(ch); });
     Opcodes.insert(Mnemonic);
   }
diff --git a/clang/include/clang/Basic/Attr.td b/clang/include/clang/Basic/Attr.td
index 156fbd1c4442eb..cb56ace6eaff47 100644
--- a/clang/include/clang/Basic/Attr.td
+++ b/clang/include/clang/Basic/Attr.td
@@ -1873,6 +1873,46 @@ def LifetimeBound : DeclOrTypeAttr {
   let SimpleHandler = 1;
 }
 
+def LifetimeCaptureBy : DeclOrTypeAttr {
+  let Spellings = [Clang<"lifetime_capture_by", 0>];
+  let Subjects = SubjectList<[ParmVar, ImplicitObjectParameter], ErrorDiag>;
+  let Args = [VariadicParamOrParamIdxArgument<"Params">];
+  let Documentation = [LifetimeBoundDocs];
+  let LangOpts = [CPlusPlus];
+
+  // let SimpleHandler = 1;
+  // let LateParsed = LateAttrParseStandard;
+  // let HasCustomParsing = 1;
+  // let ParseArgumentsAsUnevaluated = 1;
+
+  let AdditionalMembers = [{
+private:
+  SmallVector<IdentifierInfo*, 1> ArgIdents;
+  SmallVector<SourceLocation, 1> ArgLocs;
+
+public:
+  static constexpr int INVALID = -2;
+  static constexpr int UNKNOWN = -1;
+  static constexpr int GLOBAL = -1;
+  static constexpr int THIS = 0;
+
+  void setArgs(SmallVector<IdentifierInfo*, 1> Idents,
+               SmallVector<SourceLocation, 1> Locs) { 
+    assert(Idents.size() == Locs.size());
+    assert(Idents.size() == params_Size);
+    ArgIdents = std::move(Idents);
+    ArgLocs = std::move(Locs);
+  }
+  
+  const SmallVector<IdentifierInfo*, 1>& getArgIdents() const { return ArgIdents; }
+  const SmallVector<SourceLocation, 1>& getArgLocs() const { return ArgLocs; }
+  void setParamIdx(size_t Idx, int Val) { 
+    assert(Idx < params_Size);
+    params_[Idx] = Val;
+  }
+}];
+}
+
 def TrivialABI : InheritableAttr {
   // This attribute does not have a C [[]] spelling because it requires the
   // CPlusPlus language option.
diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td
index d697e6d61afa9a..52a7e816aef5fc 100644
--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -3383,6 +3383,18 @@ def err_callback_callee_is_variadic : Error<
   "'callback' attribute callee may not be variadic">;
 def err_callback_implicit_this_not_available : Error<
   "'callback' argument at position %0 references unavailable implicit 'this'">;
+
+def err_capture_by_attribute_multiple : Error<
+  "multiple 'lifetime_capture' attributes specified">;
+def err_capture_by_attribute_no_entity : Error<
+  "'lifetime_capture_by' attribute specifies no capturing entity">;
+def err_capture_by_implicit_this_not_available : Error<
+  "'lifetime_capture_by' argument references unavailable implicit 'this'">;
+def err_capture_by_attribute_argument_unknown : Error<
+  "'lifetime_capture_by' attribute argument %0 is not a known function parameter"
+  ". Must be a function parameter of one of 'this', 'global' or 'unknown'">;
+def err_capture_by_references_itself : Error<"'lifetime_capture_by' argument references itself">;
+
 def err_init_method_bad_return_type : Error<
   "init methods must return an object pointer type, not %0">;
 def err_attribute_invalid_size : Error<
@@ -10198,6 +10210,9 @@ def warn_dangling_pointer_assignment : Warning<
    "object backing %select{|the pointer }0%1 "
    "will be destroyed at the end of the full-expression">,
    InGroup<DanglingAssignment>;
+def warn_dangling_reference_captured : Warning<
+   "object captured by '%0' will be destroyed at the end of the full-expression">,
+   InGroup<DanglingCapture>;
 
 // For non-floating point, expressions of the form x == x or x != x
 // should result in a warning, since these always evaluate to a constant.
diff --git a/clang/include/clang/Sema/Sema.h b/clang/include/clang/Sema/Sema.h
index 93d98e1cbb9c81..9eb158d223bf5a 100644
--- a/clang/include/clang/Sema/Sema.h
+++ b/clang/include/clang/Sema/Sema.h
@@ -1760,6 +1760,10 @@ class Sema final : public SemaBase {
   /// Add [[gsl::Pointer]] attributes for std:: types.
   void inferGslPointerAttribute(TypedefNameDecl *TD);
 
+  LifetimeCaptureByAttr *ParseLifetimeCaptureByAttr(const ParsedAttr &AL,
+                                                    StringRef ParamName);
+  void LazyProcessLifetimeCaptureByParams(FunctionDecl *FD);
+
   /// Add _Nullable attributes for std:: types.
   void inferNullableClassAttribute(CXXRecordDecl *CRD);
 
@@ -2315,6 +2319,9 @@ class Sema final : public SemaBase {
   bool BuiltinVectorMath(CallExpr *TheCall, QualType &Res, bool FPOnly = false);
   bool BuiltinVectorToScalarMath(CallExpr *TheCall);
 
+  void checkLifetimeCaptureBy(FunctionDecl *FDecl, bool IsMemberFunction,
+                              const Expr *ThisArg, ArrayRef<const Expr *> Args);
+
   /// Handles the checks for format strings, non-POD arguments to vararg
   /// functions, NULL arguments passed to non-NULL parameters, diagnose_if
   /// attributes and AArch64 SME attributes.
diff --git a/clang/lib/AST/TypePrinter.cpp b/clang/lib/AST/TypePrinter.cpp
index 6d8db5cf4ffd22..ce37b40738da3b 100644
--- a/clang/lib/AST/TypePrinter.cpp
+++ b/clang/lib/AST/TypePrinter.cpp
@@ -12,6 +12,7 @@
 
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/Attr.h"
+#include "clang/AST/Attrs.inc"
 #include "clang/AST/Decl.h"
 #include "clang/AST/DeclBase.h"
 #include "clang/AST/DeclCXX.h"
@@ -25,6 +26,7 @@
 #include "clang/AST/TextNodeDumper.h"
 #include "clang/AST/Type.h"
 #include "clang/Basic/AddressSpaces.h"
+#include "clang/Basic/AttrKinds.h"
 #include "clang/Basic/ExceptionSpecificationType.h"
 #include "clang/Basic/IdentifierTable.h"
 #include "clang/Basic/LLVM.h"
@@ -1909,6 +1911,12 @@ void TypePrinter::printAttributedAfter(const AttributedType *T,
     OS << " [[clang::lifetimebound]]";
     return;
   }
+  if (T->getAttrKind() == attr::LifetimeCaptureBy) {
+    // FIXME: Print the attribute arguments once we have a way to retrieve these
+    // here.
+    OS << " [[clang::lifetime_capture_by(...)";
+    return;
+  }
 
   // The printing of the address_space attribute is handled by the qualifier
   // since it is still stored in the qualifier. Return early to prevent printing
@@ -1976,6 +1984,7 @@ void TypePrinter::printAttributedAfter(const AttributedType *T,
   case attr::SizedBy:
   case attr::SizedByOrNull:
   case attr::LifetimeBound:
+  case attr::LifetimeCaptureBy:
   case attr::TypeNonNull:
   case attr::TypeNullable:
   case attr::TypeNullableResult:
diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 1aa3e8edfe1b13..436ab0c2b955b4 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -16655,6 +16655,7 @@ void Sema::AddKnownFunctionAttributes(FunctionDecl *FD) {
     }
   }
 
+  LazyProcessLifetimeCaptureByParams(FD);
   inferLifetimeBoundAttribute(FD);
   AddKnownFunctionAttributesForReplaceableGlobalAllocationFunction(FD);
 
diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
index 601c6f2eef1d9c..b969c6462faa1a 100644
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -14,6 +14,7 @@
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/ASTMutationListener.h"
 #include "clang/AST/CXXInheritance.h"
+#include "clang/AST/Decl.h"
 #include "clang/AST/DeclCXX.h"
 #include "clang/AST/DeclObjC.h"
 #include "clang/AST/DeclTemplate.h"
@@ -3867,6 +3868,105 @@ static void handleCallbackAttr(Sema &S, Decl *D, const ParsedAttr &AL) {
       S.Context, AL, EncodingIndices.data(), EncodingIndices.size()));
 }
 
+LifetimeCaptureByAttr *Sema::ParseLifetimeCaptureByAttr(const ParsedAttr &AL,
+                                                        StringRef ParamName) {
+  // Atleast one capture by is required.
+  if (AL.getNumArgs() == 0) {
+    Diag(AL.getLoc(), diag::err_capture_by_attribute_no_entity)
+        << AL.getRange();
+    return nullptr;
+  }
+  SmallVector<IdentifierInfo *, 1> ParamIdents;
+  SmallVector<SourceLocation, 1> ParamLocs;
+  for (unsigned I = 0; I < AL.getNumArgs(); ++I) {
+    if (AL.isArgExpr(I)) {
+      Expr *E = AL.getArgAsExpr(I);
+      Diag(E->getExprLoc(), diag::err_capture_by_attribute_argument_unknown)
+          << E << E->getExprLoc();
+      continue;
+    }
+    assert(AL.isArgIdent(I));
+    IdentifierLoc *IdLoc = AL.getArgAsIdent(I);
+    if (IdLoc->Ident->getName() == ParamName) {
+      Diag(IdLoc->Loc, diag::err_capture_by_references_itself) << IdLoc->Loc;
+      continue;
+    }
+    ParamIdents.push_back(IdLoc->Ident);
+    ParamLocs.push_back(IdLoc->Loc);
+  }
+  SmallVector<int, 1> FakeParamIndices(ParamIdents.size(),
+                                       LifetimeCaptureByAttr::INVALID);
+  LifetimeCaptureByAttr *CapturedBy = ::new (Context) LifetimeCaptureByAttr(
+      Context, AL, FakeParamIndices.data(), FakeParamIndices.size());
+  CapturedBy->setArgs(std::move(ParamIdents), std::move(ParamLocs));
+  return CapturedBy;
+}
+
+static void HandleLifetimeCaptureByAttr(Sema &S, Decl *D,
+                                        const ParsedAttr &AL) {
+  // Do not allow multiple attributes.
+  if (D->hasAttr<LifetimeCaptureByAttr>()) {
+    S.Diag(AL.getLoc(), diag::err_capture_by_attribute_multiple)
+        << AL.getRange();
+    return;
+  }
+  auto *PVD = dyn_cast<ParmVarDecl>(D);
+  assert(PVD);
+  auto *CaptureByAttr = S.ParseLifetimeCaptureByAttr(AL, PVD->getName());
+  if (CaptureByAttr)
+    D->addAttr(CaptureByAttr);
+}
+
+void Sema::LazyProcessLifetimeCaptureByParams(FunctionDecl *FD) {
+  bool HasImplicitThisParam = isInstanceMethod(FD);
+
+  llvm::StringMap<int> NameIdxMapping;
+  NameIdxMapping["global"] = LifetimeCaptureByAttr::GLOBAL;
+  NameIdxMapping["unknown"] = LifetimeCaptureByAttr::UNKNOWN;
+  int Idx = 0;
+  if (HasImplicitThisParam) {
+    NameIdxMapping["this"] = 0;
+    Idx++;
+  }
+  for (const ParmVarDecl *PVD : FD->parameters())
+    NameIdxMapping[PVD->getName()] = Idx++;
+  auto HandleCaptureBy = [&](LifetimeCaptureByAttr *CapturedBy) {
+    if (!CapturedBy)
+      return;
+    const auto &Entities = CapturedBy->getArgIdents();
+    for (size_t I = 0; I < Entities.size(); ++I) {
+      StringRef Name = Entities[I]->getName();
+      auto It = NameIdxMapping.find(Name);
+      if (It == NameIdxMapping.end()) {
+        auto Loc = CapturedBy->getArgLocs()[I];
+        if (!HasImplicitThisParam && Name == "this")
+          Diag(Loc, diag::err_capture_by_implicit_this_not_available) << Loc;
+        else
+          Diag(Loc, diag::err_capture_by_attribute_argument_unknown)
+              << Entities[I] << Loc;
+        continue;
+      }
+      CapturedBy->setParamIdx(I, It->second);
+    }
+  };
+  for (ParmVarDecl *PVD : FD->parameters())
+    HandleCaptureBy(PVD->getAttr<LifetimeCaptureByAttr>());
+  if (!HasImplicitThisParam)
+    return;
+  TypeSourceInfo *TSI = FD->getTypeSourceInfo();
+  if (!TSI)
+    return;
+  AttributedTypeLoc ATL;
+  for (TypeLoc TL = TSI->getTypeLoc();
+       (ATL = TL.getAsAdjusted<AttributedTypeLoc>());
+       TL = ATL.getModifiedLoc()) {
+    auto *A = ATL.getAttrAs<LifetimeCaptureByAttr>();
+    if (!A)
+      continue;
+    HandleCaptureBy(const_cast<LifetimeCaptureByAttr *>(A));
+  }
+}
+
 static bool isFunctionLike(const Type &T) {
   // Check for explicit function types.
   // 'called_once' is only supported in Objective-C and it has
@@ -6632,6 +6732,9 @@ ProcessDeclAttribute(Sema &S, Scope *scope, Decl *D, const ParsedAttr &AL,
   case ParsedAttr::AT_Callback:
     handleCallbackAttr(S, D, AL);
     break;
+  case ParsedAttr::AT_LifetimeCaptureBy:
+    HandleLifetimeCaptureByAttr(S, D, AL);
+    break;
   case ParsedAttr::AT_CalledOnce:
     handleCalledOnceAttr(S, D, AL);
     break;
diff --git a/clang/test/SemaCXX/attr-lifetime-capture-by.cpp b/clang/test/SemaCXX/attr-lifetime-capture-by.cpp
new file mode 100644
index 00000000000000..192ec9bec640a5
--- /dev/null
+++ b/clang/test/SemaCXX/attr-lifetime-capture-by.cpp
@@ -0,0 +1,40 @@
+// RUN: %clang_cc1 -std=c++23 -verify %s
+
+struct S {
+  const int *x;
+  void captureInt(const int&x [[clang::lifetime_capture_by(this)]]) { this->x = &x; }
+};
+
+///////////////////////////
+// Test for valid usages.
+///////////////////////////
+[[clang::lifetime_capture_by(unknown)]] // expected-error {{'lifetime_capture_by' attribute only applies to parameters and implicit object parameters}}
+void nonMember(
+    const int &x1 [[clang::lifetime_capture_by(s, t)]],
+    S &s,
+    S &t,
+    const int &x2 [[clang::lifetime_capture_by(12345 + 12)]], // expected-error {{'lifetime_capture_by' attribute argument 12345 + 12 is not a known function parameter. Must be a function parameter of one of 'this', 'global' or 'unknown'}}
+    const int &x3 [[clang::lifetime_capture_by(abcdefgh)]],   // expected-error {{'lifetime_capture_by' attribute argument 'abcdefgh' is not a known function parameter. Must be a function parameter of one of 'this', 'global' or 'unknown'}}
+    const int &x4 [[clang::lifetime_capture_by("abcdefgh")]], // expected-error {{'lifetime_capture_by' attribute argument "abcdefgh" is not a known function parameter. Must be a function parameter of one of 'this', 'global' or 'unknown'}}
+    const int &x5 [[clang::lifetime_capture_by(this)]], // expected-error {{'lifetime_capture_by' argument references unavailable implicit 'this'}}
+    const int &x6 [[clang::lifetime_capture_by()]], // expected-error {{'lifetime_capture_by' attribute specifies no capturing entity}}
+    const int& x7 [[clang::lifetime_capture_by(u, 
+                                               x7)]], // expected-error {{'lifetime_capture_by' argument references itself}}
+    const S& u
+  )
+{
+  s.captureInt(x1);
+}
+
+struct T {
+  void member(
+    const int &x [[clang::lifetime_capture_by(s)]], 
+    S &s,
+    S &t,            
+    const int &y [[clang::lifetime_capture_by(s)]],
+    const int &z [[clang::lifetime_capture_by(this, x, y)]],
+    const int &u [[clang::lifetime_capture_by(global, x, s)]])
+  {
+    s.captureInt(x);
+  }
+};
diff --git a/llvm/include/llvm/MC/MCInstPrinter.h b/llvm/include/llvm/MC/MCInstPrinter.h
index e825c04a6dba6f..ab1361313be05a 100644
--- a/llvm/include/llvm/MC/MCInstPrinter.h
+++ b/llvm/include/llvm/MC/MCInstPrinter.h
@@ -131,7 +131,8 @@ class MCInstPrinter {
 
   /// Returns a pair containing the mnemonic for \p MI and the number of bits
   /// left for further processing by printInstruction (generated by tablegen).
-  virtual std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) = 0;
+  virtual std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const = 0;
 
   /// Print the specified MCInst to the specified raw_ostream.
   ///
diff --git a/llvm/include/llvm/MC/MCStreamer.h b/llvm/include/llvm/MC/MCStreamer.h
index a376ba810ba515..df2eb9cf136bc9 100644
--- a/llvm/include/llvm/MC/MCStreamer.h
+++ b/llvm/include/llvm/MC/MCStreamer.h
@@ -441,7 +441,7 @@ class MCStreamer {
 
   /// Returns the mnemonic for \p MI, if the streamer has access to a
   /// instruction printer and returns an empty string otherwise.
-  virtual StringRef getMnemonic(MCInst &MI) { return ""; }
+  virtual StringRef getMnemonic(const MCInst &MI) const { return ""; }
 
   /// Emit a label for \p Symbol into the current section.
   ///
diff --git a/llvm/lib/MC/MCAsmStreamer.cpp b/llvm/lib/MC/MCAsmStreamer.cpp
index b9ad0b4eac9c7b..112a4b3f1e9cd4 100644
--- a/llvm/lib/MC/MCAsmStreamer.cpp
+++ b/llvm/lib/MC/MCAsmStreamer.cpp
@@ -169,8 +169,8 @@ class MCAsmStreamer final : public MCStreamer {
 
   void emitGNUAttribute(unsigned Tag, unsigned Value) override;
 
-  StringRef getMnemonic(MCInst &MI) override {
-    auto [Ptr, Bits] = InstPrinter->getMnemonic(&MI);
+  StringRef getMnemonic(const MCInst &MI) const override {
+    auto [Ptr, Bits] = InstPrinter->getMnemonic(MI);
     assert((Bits != 0 || Ptr == nullptr) &&
            "Invalid char pointer for instruction with no mnemonic");
     return Ptr;
diff --git a/llvm/lib/Target/AArch64/MCTargetDesc/AArch64InstPrinter.h b/llvm/lib/Target/AArch64/MCTargetDesc/AArch64InstPrinter.h
index 9cf2674ae943aa..15ef2ddfc22fdd 100644
--- a/llvm/lib/Target/AArch64/MCTargetDesc/AArch64InstPrinter.h
+++ b/llvm/lib/Target/AArch64/MCTargetDesc/AArch64InstPrinter.h
@@ -33,7 +33,8 @@ class AArch64InstPrinter : public MCInstPrinter {
   void printRegName(raw_ostream &OS, MCRegister Reg, unsigned AltIdx);
 
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   virtual void printInstruction(const MCInst *MI, uint64_t Address,
                                 const MCSubtargetInfo &STI, raw_ostream &O);
   virtual bool printAliasInstr(const MCInst *MI, uint64_t Address,
@@ -248,7 +249,8 @@ class AArch64AppleInstPrinter : public AArch64InstPrinter {
   void printInst(const MCInst *MI, uint64_t Address, StringRef Annot,
                  const MCSubtargetInfo &STI, raw_ostream &O) override;
 
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address,
                         const MCSubtargetInfo &STI, raw_ostream &O) override;
   bool printAliasInstr(const MCInst *MI, uint64_t Address,
diff --git a/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUInstPrinter.h b/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUInstPrinter.h
index 4729b8a6aa6f40..5a7d6cf7ba595f 100644
--- a/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUInstPrinter.h
+++ b/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUInstPrinter.h
@@ -24,7 +24,8 @@ class AMDGPUInstPrinter : public MCInstPrinter {
     : MCInstPrinter(MAI, MII, MRI) {}
 
   // Autogenerated by tblgen
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address,
                         const MCSubtargetInfo &STI, raw_ostream &O);
   static const char *getRegisterName(MCRegister Reg);
diff --git a/llvm/lib/Target/AMDGPU/MCTargetDesc/R600InstPrinter.h b/llvm/lib/Target/AMDGPU/MCTargetDesc/R600InstPrinter.h
index afaab31375ce46..5c6572d79ccfb0 100644
--- a/llvm/lib/Target/AMDGPU/MCTargetDesc/R600InstPrinter.h
+++ b/llvm/lib/Target/AMDGPU/MCTargetDesc/R600InstPrinter.h
@@ -21,7 +21,8 @@ class R600InstPrinter : public MCInstPrinter {
 
   void printInst(const MCInst *MI, uint64_t Address, StringRef Annot,
                  const MCSubtargetInfo &STI, raw_ostream &O) override;
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O);
   static const char *getRegisterName(MCRegister Reg);
 
diff --git a/llvm/lib/Target/ARC/MCTargetDesc/ARCInstPrinter.h b/llvm/lib/Target/ARC/MCTargetDesc/ARCInstPrinter.h
index c4bd73448ca71b..8c900b3c6858b8 100644
--- a/llvm/lib/Target/ARC/MCTargetDesc/ARCInstPrinter.h
+++ b/llvm/lib/Target/ARC/MCTargetDesc/ARCInstPrinter.h
@@ -26,7 +26,8 @@ class ARCInstPrinter : public MCInstPrinter {
       : MCInstPrinter(MAI, MII, MRI) {}
 
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O);
   static const char *getRegisterName(MCRegister Reg);
 
diff --git a/llvm/lib/Target/ARM/MCTargetDesc/ARMInstPrinter.h b/llvm/lib/Target/ARM/MCTargetDesc/ARMInstPrinter.h
index cd1dddc5f331a3..7b95b9580740f3 100644
--- a/llvm/lib/Target/ARM/MCTargetDesc/ARMInstPrinter.h
+++ b/llvm/lib/Target/ARM/MCTargetDesc/ARMInstPrinter.h
@@ -30,7 +30,8 @@ class ARMInstPrinter : public MCInstPrinter {
   void printRegName(raw_ostream &OS, MCRegister Reg) override;
 
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address,
                         const MCSubtargetInfo &STI, raw_ostream &O);
   virtual bool printAliasInstr(const MCInst *MI, uint64_t Address,
diff --git a/llvm/lib/Target/AVR/MCTargetDesc/AVRInstPrinter.h b/llvm/lib/Target/AVR/MCTargetDesc/AVRInstPrinter.h
index 8ba24dc80d884e..c5c3fb46a6b9cd 100644
--- a/llvm/lib/Target/AVR/MCTargetDesc/AVRInstPrinter.h
+++ b/llvm/lib/Target/AVR/MCTargetDesc/AVRInstPrinter.h
@@ -48,7 +48,8 @@ class AVRInstPrinter : public MCInstPrinter {
   }
 
   // Autogenerated by TableGen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O);
   bool printAliasInstr(const MCInst *MI, uint64_t Address, raw_ostream &O);
   void printCustomAliasOperand(const MCInst *MI, uint64_t Address,
diff --git a/llvm/lib/Target/BPF/MCTargetDesc/BPFInstPrinter.h b/llvm/lib/Target/BPF/MCTargetDesc/BPFInstPrinter.h
index ad2dee1a97b887..41835bb2d10d87 100644
--- a/llvm/lib/Target/BPF/MCTargetDesc/BPFInstPrinter.h
+++ b/llvm/lib/Target/BPF/MCTargetDesc/BPFInstPrinter.h
@@ -32,7 +32,8 @@ class BPFInstPrinter : public MCInstPrinter {
   void printBrTargetOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
 
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O);
   static const char *getRegisterName(MCRegister Reg);
 };
diff --git a/llvm/lib/Target/CSKY/MCTargetDesc/CSKYInstPrinter.h b/llvm/lib/Target/CSKY/MCTargetDesc/CSKYInstPrinter.h
index 16eccfdfb5ce5b..6640add076b4b9 100644
--- a/llvm/lib/Target/CSKY/MCTargetDesc/CSKYInstPrinter.h
+++ b/llvm/lib/Target/CSKY/MCTargetDesc/CSKYInstPrinter.h
@@ -39,7 +39,8 @@ class CSKYInstPrinter : public MCInstPrinter {
   void printFPRRegName(raw_ostream &O, unsigned RegNo) const;
 
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address,
                         const MCSubtargetInfo &STI, raw_ostream &O);
   bool printAliasInstr(const MCInst *MI, uint64_t Address,
diff --git a/llvm/lib/Target/DirectX/MCTargetDesc/DirectXMCTargetDesc.cpp b/llvm/lib/Target/DirectX/MCTargetDesc/DirectXMCTargetDesc.cpp
index 5a64bf6482d5ed..ea5cd756b35d85 100644
--- a/llvm/lib/Target/DirectX/MCTargetDesc/DirectXMCTargetDesc.cpp
+++ b/llvm/lib/Target/DirectX/MCTargetDesc/DirectXMCTargetDesc.cpp
@@ -53,7 +53,8 @@ class DXILInstPrinter : public MCInstPrinter {
   void printInst(const MCInst *MI, uint64_t Address, StringRef Annot,
                  const MCSubtargetInfo &STI, raw_ostream &O) override {}
 
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override {
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override {
     return std::make_pair<const char *, uint64_t>("", 0ull);
   }
 
diff --git a/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonInstPrinter.h b/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonInstPrinter.h
index fe37cd91dabc6a..5435461b343aac 100644
--- a/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonInstPrinter.h
+++ b/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonInstPrinter.h
@@ -34,7 +34,8 @@ class HexagonInstPrinter : public MCInstPrinter {
 
   static char const *getRegisterName(MCRegister Reg);
 
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O);
   void printOperand(MCInst const *MI, unsigned OpNo, raw_ostream &O) const;
   void printBrtarget(MCInst const *MI, unsigned OpNo, raw_ostream &O) const;
diff --git a/llvm/lib/Target/Lanai/MCTargetDesc/LanaiInstPrinter.h b/llvm/lib/Target/Lanai/MCTargetDesc/LanaiInstPrinter.h
index 851613b27e3dd9..de3cb8c178d8d2 100644
--- a/llvm/lib/Target/Lanai/MCTargetDesc/LanaiInstPrinter.h
+++ b/llvm/lib/Target/Lanai/MCTargetDesc/LanaiInstPrinter.h
@@ -42,7 +42,8 @@ class LanaiInstPrinter : public MCInstPrinter {
   void printMemImmOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
 
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O);
   bool printAliasInstr(const MCInst *MI, uint64_t Address, raw_ostream &OS);
   void printCustomAliasOperand(const MCInst *MI, uint64_t Address,
diff --git a/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchInstPrinter.h b/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchInstPrinter.h
index 8cda3fdb4510e5..235f967f50ff4b 100644
--- a/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchInstPrinter.h
+++ b/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchInstPrinter.h
@@ -33,7 +33,8 @@ class LoongArchInstPrinter : public MCInstPrinter {
                         const MCSubtargetInfo &STI, raw_ostream &O);
 
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address,
                         const MCSubtargetInfo &STI, raw_ostream &O);
   bool printAliasInstr(const MCInst *MI, uint64_t Address,
diff --git a/llvm/lib/Target/M68k/MCTargetDesc/M68kInstPrinter.h b/llvm/lib/Target/M68k/MCTargetDesc/M68kInstPrinter.h
index d6d17ca9568e02..32ca9131d4ce72 100644
--- a/llvm/lib/Target/M68k/MCTargetDesc/M68kInstPrinter.h
+++ b/llvm/lib/Target/M68k/MCTargetDesc/M68kInstPrinter.h
@@ -42,7 +42,8 @@ class M68kInstPrinter : public MCInstPrinter,
   void printCustomAliasOperand(const MCInst *MI, unsigned OpIdx,
                                unsigned PrintMethodIdx, raw_ostream &O);
 
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
 
 private:
   void printOperand(const MCInst *MI, unsigned opNum, raw_ostream &O);
diff --git a/llvm/lib/Target/MSP430/MCTargetDesc/MSP430InstPrinter.h b/llvm/lib/Target/MSP430/MCTargetDesc/MSP430InstPrinter.h
index 413492b8efeeda..e1785c98bd5c76 100644
--- a/llvm/lib/Target/MSP430/MCTargetDesc/MSP430InstPrinter.h
+++ b/llvm/lib/Target/MSP430/MCTargetDesc/MSP430InstPrinter.h
@@ -28,7 +28,8 @@ namespace llvm {
                    const MCSubtargetInfo &STI, raw_ostream &O) override;
 
     // Autogenerated by tblgen.
-    std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+    std::pair<const char *, uint64_t>
+    getMnemonic(const MCInst &MI) const override;
     void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O);
     bool printAliasInstr(const MCInst *MI, uint64_t Address, raw_ostream &O);
     void printCustomAliasOperand(const MCInst *MI, uint64_t Address,
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsInstPrinter.h b/llvm/lib/Target/Mips/MCTargetDesc/MipsInstPrinter.h
index 8e3b4614a4aade..3924cf02e2d6b0 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsInstPrinter.h
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsInstPrinter.h
@@ -79,7 +79,8 @@ class MipsInstPrinter : public MCInstPrinter {
     : MCInstPrinter(MAI, MII, MRI) {}
 
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address,
                         const MCSubtargetInfo &STI, raw_ostream &O);
   static const char *getRegisterName(MCRegister Reg);
diff --git a/llvm/lib/Target/NVPTX/MCTargetDesc/NVPTXInstPrinter.h b/llvm/lib/Target/NVPTX/MCTargetDesc/NVPTXInstPrinter.h
index 63207e8a975ace..a17c472d3f0d90 100644
--- a/llvm/lib/Target/NVPTX/MCTargetDesc/NVPTXInstPrinter.h
+++ b/llvm/lib/Target/NVPTX/MCTargetDesc/NVPTXInstPrinter.h
@@ -29,7 +29,8 @@ class NVPTXInstPrinter : public MCInstPrinter {
                  const MCSubtargetInfo &STI, raw_ostream &OS) override;
 
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O);
   static const char *getRegisterName(MCRegister Reg);
   // End
diff --git a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCInstPrinter.h b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCInstPrinter.h
index 1b9365fa04961c..2286484c8a2ddc 100644
--- a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCInstPrinter.h
+++ b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCInstPrinter.h
@@ -36,7 +36,8 @@ class PPCInstPrinter : public MCInstPrinter {
                  const MCSubtargetInfo &STI, raw_ostream &O) override;
 
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address,
                         const MCSubtargetInfo &STI, raw_ostream &O);
   static const char *getRegisterName(MCRegister Reg);
diff --git a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVInstPrinter.h b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVInstPrinter.h
index c15fd591b9e956..6d4928ee64ec91 100644
--- a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVInstPrinter.h
+++ b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVInstPrinter.h
@@ -62,7 +62,8 @@ class RISCVInstPrinter : public MCInstPrinter {
   void printRegReg(const MCInst *MI, unsigned OpNo, const MCSubtargetInfo &STI,
                    raw_ostream &O);
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address,
                         const MCSubtargetInfo &STI, raw_ostream &O);
   bool printAliasInstr(const MCInst *MI, uint64_t Address,
diff --git a/llvm/lib/Target/SPIRV/MCTargetDesc/SPIRVInstPrinter.h b/llvm/lib/Target/SPIRV/MCTargetDesc/SPIRVInstPrinter.h
index 424249a09e56a5..9b02524f50b81b 100644
--- a/llvm/lib/Target/SPIRV/MCTargetDesc/SPIRVInstPrinter.h
+++ b/llvm/lib/Target/SPIRV/MCTargetDesc/SPIRVInstPrinter.h
@@ -46,7 +46,8 @@ class SPIRVInstPrinter : public MCInstPrinter {
   void printSymbolicOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
 
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O);
   static const char *getRegisterName(MCRegister Reg);
 };
diff --git a/llvm/lib/Target/Sparc/MCTargetDesc/SparcInstPrinter.h b/llvm/lib/Target/Sparc/MCTargetDesc/SparcInstPrinter.h
index 52321d56211858..6a1d2394d488ec 100644
--- a/llvm/lib/Target/Sparc/MCTargetDesc/SparcInstPrinter.h
+++ b/llvm/lib/Target/Sparc/MCTargetDesc/SparcInstPrinter.h
@@ -33,7 +33,8 @@ class SparcInstPrinter : public MCInstPrinter {
   bool isV9(const MCSubtargetInfo &STI) const;
 
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address,
                         const MCSubtargetInfo &STI, raw_ostream &O);
   bool printAliasInstr(const MCInst *MI, uint64_t Address,
diff --git a/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZGNUInstPrinter.h b/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZGNUInstPrinter.h
index 7095e325c70bc0..a0f7e9b4665013 100644
--- a/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZGNUInstPrinter.h
+++ b/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZGNUInstPrinter.h
@@ -28,7 +28,8 @@ class SystemZGNUInstPrinter : public SystemZInstPrinterCommon {
       : SystemZInstPrinterCommon(MAI, MII, MRI) {}
 
   // Automatically generated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O);
   static const char *getRegisterName(MCRegister Reg);
 
diff --git a/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZHLASMInstPrinter.h b/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZHLASMInstPrinter.h
index ffccbec36c7491..2732986dbca7d1 100644
--- a/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZHLASMInstPrinter.h
+++ b/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZHLASMInstPrinter.h
@@ -28,7 +28,8 @@ class SystemZHLASMInstPrinter : public SystemZInstPrinterCommon {
       : SystemZInstPrinterCommon(MAI, MII, MRI) {}
 
   // Automatically generated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O);
   static const char *getRegisterName(MCRegister Reg);
 
diff --git a/llvm/lib/Target/VE/MCTargetDesc/VEInstPrinter.h b/llvm/lib/Target/VE/MCTargetDesc/VEInstPrinter.h
index d5e0ebd3596ca8..aa3b003aaba14f 100644
--- a/llvm/lib/Target/VE/MCTargetDesc/VEInstPrinter.h
+++ b/llvm/lib/Target/VE/MCTargetDesc/VEInstPrinter.h
@@ -29,7 +29,8 @@ class VEInstPrinter : public MCInstPrinter {
                  const MCSubtargetInfo &STI, raw_ostream &OS) override;
 
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   bool printAliasInstr(const MCInst *, uint64_t Address,
                        const MCSubtargetInfo &, raw_ostream &);
   void printInstruction(const MCInst *, uint64_t, const MCSubtargetInfo &,
diff --git a/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.cpp b/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.cpp
index 026f859b15d715..285b7279cecd00 100644
--- a/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.cpp
+++ b/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.cpp
@@ -57,7 +57,7 @@ void WebAssemblyInstPrinter::printInst(const MCInst *MI, uint64_t Address,
     // operand isn't a symbol, then we have an MVP compilation unit, and the
     // table shouldn't appear in the output.
     OS << "\t";
-    OS << getMnemonic(MI).first;
+    OS << getMnemonic(*MI).first;
     OS << " ";
 
     assert(MI->getNumOperands() == 2);
diff --git a/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.h b/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.h
index e7c5e14973b630..c9351a0e449268 100644
--- a/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.h
+++ b/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.h
@@ -50,7 +50,8 @@ class WebAssemblyInstPrinter final : public MCInstPrinter {
   void printCatchList(const MCInst *MI, unsigned OpNo, raw_ostream &O);
 
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O);
   static const char *getRegisterName(MCRegister Reg);
 };
diff --git a/llvm/lib/Target/X86/MCTargetDesc/X86ATTInstPrinter.h b/llvm/lib/Target/X86/MCTargetDesc/X86ATTInstPrinter.h
index 7e525e23236229..f49f09c5dcf3ef 100644
--- a/llvm/lib/Target/X86/MCTargetDesc/X86ATTInstPrinter.h
+++ b/llvm/lib/Target/X86/MCTargetDesc/X86ATTInstPrinter.h
@@ -36,7 +36,8 @@ class X86ATTInstPrinter final : public X86InstPrinterCommon {
                                raw_ostream &O);
 
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &OS);
   static const char *getRegisterName(MCRegister Reg);
 
diff --git a/llvm/lib/Target/X86/MCTargetDesc/X86IntelInstPrinter.h b/llvm/lib/Target/X86/MCTargetDesc/X86IntelInstPrinter.h
index 988ab9626c3fd7..324c56c1329da1 100644
--- a/llvm/lib/Target/X86/MCTargetDesc/X86IntelInstPrinter.h
+++ b/llvm/lib/Target/X86/MCTargetDesc/X86IntelInstPrinter.h
@@ -37,7 +37,8 @@ class X86IntelInstPrinter final : public X86InstPrinterCommon {
                                raw_ostream &O);
 
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O);
   static const char *getRegisterName(MCRegister Reg);
 
diff --git a/llvm/lib/Target/XCore/MCTargetDesc/XCoreInstPrinter.h b/llvm/lib/Target/XCore/MCTargetDesc/XCoreInstPrinter.h
index 2b47de457322ee..33a2af03a877d2 100644
--- a/llvm/lib/Target/XCore/MCTargetDesc/XCoreInstPrinter.h
+++ b/llvm/lib/Target/XCore/MCTargetDesc/XCoreInstPrinter.h
@@ -27,7 +27,8 @@ class XCoreInstPrinter : public MCInstPrinter {
     : MCInstPrinter(MAI, MII, MRI) {}
 
   // Autogenerated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O);
   static const char *getRegisterName(MCRegister Reg);
 
diff --git a/llvm/lib/Target/Xtensa/MCTargetDesc/XtensaInstPrinter.h b/llvm/lib/Target/Xtensa/MCTargetDesc/XtensaInstPrinter.h
index 4122b1ff2310b7..f56d5d1458dc11 100644
--- a/llvm/lib/Target/Xtensa/MCTargetDesc/XtensaInstPrinter.h
+++ b/llvm/lib/Target/Xtensa/MCTargetDesc/XtensaInstPrinter.h
@@ -28,7 +28,8 @@ class XtensaInstPrinter : public MCInstPrinter {
       : MCInstPrinter(MAI, MII, MRI) {}
 
   // Automatically generated by tblgen.
-  std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
+  std::pair<const char *, uint64_t>
+  getMnemonic(const MCInst &MI) const override;
   void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O);
   static const char *getRegisterName(MCRegister Reg);
 
diff --git a/llvm/utils/TableGen/AsmWriterEmitter.cpp b/llvm/utils/TableGen/AsmWriterEmitter.cpp
index 3f09564cc0d650..b6f999093dc9ec 100644
--- a/llvm/utils/TableGen/AsmWriterEmitter.cpp
+++ b/llvm/utils/TableGen/AsmWriterEmitter.cpp
@@ -333,8 +333,9 @@ void AsmWriterEmitter::EmitGetMnemonic(
   O << "/// getMnemonic - This method is automatically generated by "
        "tablegen\n"
        "/// from the instruction set description.\n"
-       "std::pair<const char *, uint64_t> "
-    << Target.getName() << ClassName << "::getMnemonic(const MCInst *MI) {\n";
+       "std::pair<const char *, uint64_t>\n"
+    << Target.getName() << ClassName
+    << "::getMnemonic(const MCInst &MI) const {\n";
 
   // Build an aggregate string, and build a table of offsets into it.
   SequenceToOffsetTable<std::string> StringTable;
@@ -458,7 +459,7 @@ void AsmWriterEmitter::EmitGetMnemonic(
     // If the total bits is more than 32-bits we need to use a 64-bit type.
     if (BitsLeft < (OpcodeInfoBits - 32))
       BitsOS << "(uint64_t)";
-    BitsOS << "OpInfo" << Table << "[MI->getOpcode()] << " << Shift << ";\n";
+    BitsOS << "OpInfo" << Table << "[MI.getOpcode()] << " << Shift << ";\n";
     // Prepare the shift for the next iteration and increment the table count.
     Shift += TableSize;
     ++Table;
@@ -508,7 +509,7 @@ void AsmWriterEmitter::EmitPrintInstruction(
   O << "  O << \"\\t\";\n\n";
 
   // Emit the starting string.
-  O << "  auto MnemonicInfo = getMnemonic(MI);\n\n";
+  O << "  auto MnemonicInfo = getMnemonic(*MI);\n\n";
   O << "  O << MnemonicInfo.first;\n\n";
 
   O << "  uint" << ((BitsLeft < (OpcodeInfoBits - 32)) ? 64 : 32)



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