vendor/llvm-project/llvmorg-15-init-15358-g53dc0f107877

1 files changed, 103 insertions, 17 deletions

diff --git a/clang/lib/CodeGen/CodeGenModule.h b/clang/lib/CodeGen/CodeGenModule.h
index 1fcd5d4d808a..da43b9616c88 100644
--- a/clang/lib/CodeGen/CodeGenModule.h
+++ b/clang/lib/CodeGen/CodeGenModule.h
@@ -85,6 +85,7 @@ class CGObjCRuntime;
 class CGOpenCLRuntime;
 class CGOpenMPRuntime;
 class CGCUDARuntime;
+class CGHLSLRuntime;
 class CoverageMappingModuleGen;
 class TargetCodeGenInfo;
 
@@ -319,6 +320,7 @@ private:
   std::unique_ptr<CGOpenCLRuntime> OpenCLRuntime;
   std::unique_ptr<CGOpenMPRuntime> OpenMPRuntime;
   std::unique_ptr<CGCUDARuntime> CUDARuntime;
+  std::unique_ptr<CGHLSLRuntime> HLSLRuntime;
   std::unique_ptr<CGDebugInfo> DebugInfo;
   std::unique_ptr<ObjCEntrypoints> ObjCData;
   llvm::MDNode *NoObjCARCExceptionsMetadata = nullptr;
@@ -348,8 +350,9 @@ private:
   /// is defined once we get to the end of the of the translation unit.
   std::vector<GlobalDecl> Aliases;
 
-  /// List of multiversion functions that have to be emitted.  Used to make sure
-  /// we properly emit the iFunc.
+  /// List of multiversion functions to be emitted. This list is processed in
+  /// conjunction with other deferred symbols and is used to ensure that
+  /// multiversion function resolvers and ifuncs are defined and emitted.
   std::vector<GlobalDecl> MultiVersionFuncs;
 
   typedef llvm::StringMap<llvm::TrackingVH<llvm::Constant> > ReplacementsTy;
@@ -406,6 +409,8 @@ private:
   llvm::StringMap<llvm::GlobalVariable *> CFConstantStringMap;
 
   llvm::DenseMap<llvm::Constant *, llvm::GlobalVariable *> ConstantStringMap;
+  llvm::DenseMap<const UnnamedGlobalConstantDecl *, llvm::GlobalVariable *>
+      UnnamedGlobalConstantDeclMap;
   llvm::DenseMap<const Decl*, llvm::Constant *> StaticLocalDeclMap;
   llvm::DenseMap<const Decl*, llvm::GlobalVariable*> StaticLocalDeclGuardMap;
   llvm::DenseMap<const Expr*, llvm::Constant *> MaterializedGlobalTemporaryMap;
@@ -509,6 +514,7 @@ private:
   void createOpenCLRuntime();
   void createOpenMPRuntime();
   void createCUDARuntime();
+  void createHLSLRuntime();
 
   bool isTriviallyRecursive(const FunctionDecl *F);
   bool shouldEmitFunction(GlobalDecl GD);
@@ -561,6 +567,8 @@ private:
   MetadataTypeMap VirtualMetadataIdMap;
   MetadataTypeMap GeneralizedMetadataIdMap;
 
+  llvm::DenseMap<const llvm::Constant *, llvm::GlobalVariable *> RTTIProxyMap;
+
 public:
   CodeGenModule(ASTContext &C, const HeaderSearchOptions &headersearchopts,
                 const PreprocessorOptions &ppopts,
@@ -607,6 +615,12 @@ public:
     return *CUDARuntime;
   }
 
+  /// Return a reference to the configured HLSL runtime.
+  CGHLSLRuntime &getHLSLRuntime() {
+    assert(HLSLRuntime != nullptr);
+    return *HLSLRuntime;
+  }
+
   ObjCEntrypoints &getObjCEntrypoints() const {
     assert(ObjCData != nullptr);
     return *ObjCData;
@@ -786,6 +800,14 @@ public:
 
   void setDSOLocal(llvm::GlobalValue *GV) const;
 
+  bool shouldMapVisibilityToDLLExport(const NamedDecl *D) const {
+    return getLangOpts().hasDefaultVisibilityExportMapping() && D &&
+           (D->getLinkageAndVisibility().getVisibility() ==
+            DefaultVisibility) &&
+           (getLangOpts().isAllDefaultVisibilityExportMapping() ||
+            (getLangOpts().isExplicitDefaultVisibilityExportMapping() &&
+             D->getLinkageAndVisibility().isVisibilityExplicit()));
+  }
   void setDLLImportDLLExport(llvm::GlobalValue *GV, GlobalDecl D) const;
   void setDLLImportDLLExport(llvm::GlobalValue *GV, const NamedDecl *D) const;
   /// Set visibility, dllimport/dllexport and dso_local.
@@ -826,7 +848,9 @@ public:
 
   llvm::Function *CreateGlobalInitOrCleanUpFunction(
       llvm::FunctionType *ty, const Twine &name, const CGFunctionInfo &FI,
-      SourceLocation Loc = SourceLocation(), bool TLS = false);
+      SourceLocation Loc = SourceLocation(), bool TLS = false,
+      llvm::GlobalVariable::LinkageTypes Linkage =
+          llvm::GlobalVariable::InternalLinkage);
 
   /// Return the AST address space of the underlying global variable for D, as
   /// determined by its declaration. Normally this is the same as the address
@@ -873,6 +897,10 @@ public:
   /// Get the address of a GUID.
   ConstantAddress GetAddrOfMSGuidDecl(const MSGuidDecl *GD);
 
+  /// Get the address of a UnnamedGlobalConstant
+  ConstantAddress
+  GetAddrOfUnnamedGlobalConstantDecl(const UnnamedGlobalConstantDecl *GCD);
+
   /// Get the address of a template parameter object.
   ConstantAddress
   GetAddrOfTemplateParamObject(const TemplateParamObjectDecl *TPO);
@@ -1213,6 +1241,7 @@ public:
 
   StringRef getMangledName(GlobalDecl GD);
   StringRef getBlockMangledName(GlobalDecl GD, const BlockDecl *BD);
+  const GlobalDecl getMangledNameDecl(StringRef);
 
   void EmitTentativeDefinition(const VarDecl *D);
 
@@ -1287,8 +1316,9 @@ public:
   bool isInNoSanitizeList(SanitizerMask Kind, llvm::Function *Fn,
                           SourceLocation Loc) const;
 
-  bool isInNoSanitizeList(llvm::GlobalVariable *GV, SourceLocation Loc,
-                          QualType Ty, StringRef Category = StringRef()) const;
+  bool isInNoSanitizeList(SanitizerMask Kind, llvm::GlobalVariable *GV,
+                          SourceLocation Loc, QualType Ty,
+                          StringRef Category = StringRef()) const;
 
   /// Imbue XRay attributes to a function, applying the always/never attribute
   /// lists in the process. Returns true if we did imbue attributes this way,
@@ -1346,15 +1376,18 @@ public:
   /// \param D The allocate declaration
   void EmitOMPAllocateDecl(const OMPAllocateDecl *D);
 
+  /// Return the alignment specified in an allocate directive, if present.
+  llvm::Optional<CharUnits> getOMPAllocateAlignment(const VarDecl *VD);
+
   /// Returns whether the given record has hidden LTO visibility and therefore
   /// may participate in (single-module) CFI and whole-program vtable
   /// optimization.
   bool HasHiddenLTOVisibility(const CXXRecordDecl *RD);
 
-  /// Returns whether the given record has public std LTO visibility
-  /// and therefore may not participate in (single-module) CFI and whole-program
-  /// vtable optimization.
-  bool HasLTOVisibilityPublicStd(const CXXRecordDecl *RD);
+  /// Returns whether the given record has public LTO visibility (regardless of
+  /// -lto-whole-program-visibility) and therefore may not participate in
+  /// (single-module) CFI and whole-program vtable optimization.
+  bool AlwaysHasLTOVisibilityPublic(const CXXRecordDecl *RD);
 
   /// Returns the vcall visibility of the given type. This is the scope in which
   /// a virtual function call could be made which ends up being dispatched to a
@@ -1411,6 +1444,9 @@ public:
   std::vector<const CXXRecordDecl *>
   getMostBaseClasses(const CXXRecordDecl *RD);
 
+  llvm::GlobalVariable *
+  GetOrCreateRTTIProxyGlobalVariable(llvm::Constant *Addr);
+
   /// Get the declaration of std::terminate for the platform.
   llvm::FunctionCallee getTerminateFn();
 
@@ -1429,7 +1465,7 @@ public:
   /// \param FN is a pointer to IR function being generated.
   /// \param FD is a pointer to function declaration if any.
   /// \param CGF is a pointer to CodeGenFunction that generates this function.
-  void GenOpenCLArgMetadata(llvm::Function *FN,
+  void GenKernelArgMetadata(llvm::Function *FN,
                             const FunctionDecl *FD = nullptr,
                             CodeGenFunction *CGF = nullptr);
 
@@ -1447,9 +1483,40 @@ public:
                                            TBAAAccessInfo *TBAAInfo = nullptr);
   bool stopAutoInit();
 
-  /// Print the postfix for externalized static variable for single source
-  /// offloading languages CUDA and HIP.
-  void printPostfixForExternalizedStaticVar(llvm::raw_ostream &OS) const;
+  /// Print the postfix for externalized static variable or kernels for single
+  /// source offloading languages CUDA and HIP. The unique postfix is created
+  /// using either the CUID argument, or the file's UniqueID and active macros.
+  /// The fallback method without a CUID requires that the offloading toolchain
+  /// does not define separate macros via the -cc1 options.
+  void printPostfixForExternalizedDecl(llvm::raw_ostream &OS,
+                                       const Decl *D) const;
+
+  /// Move some lazily-emitted states to the NewBuilder. This is especially
+  /// essential for the incremental parsing environment like Clang Interpreter,
+  /// because we'll lose all important information after each repl.
+  void moveLazyEmissionStates(CodeGenModule *NewBuilder) {
+    assert(DeferredDeclsToEmit.empty() &&
+           "Should have emitted all decls deferred to emit.");
+    assert(NewBuilder->DeferredDecls.empty() &&
+           "Newly created module should not have deferred decls");
+    NewBuilder->DeferredDecls = std::move(DeferredDecls);
+
+    assert(NewBuilder->DeferredVTables.empty() &&
+           "Newly created module should not have deferred vtables");
+    NewBuilder->DeferredVTables = std::move(DeferredVTables);
+
+    assert(NewBuilder->MangledDeclNames.empty() &&
+           "Newly created module should not have mangled decl names");
+    assert(NewBuilder->Manglings.empty() &&
+           "Newly created module should not have manglings");
+    NewBuilder->Manglings = std::move(Manglings);
+
+    assert(WeakRefReferences.empty() &&
+           "Not all WeakRefRefs have been applied");
+    NewBuilder->WeakRefReferences = std::move(WeakRefReferences);
+
+    NewBuilder->TBAA = std::move(TBAA);
+  }
 
 private:
   llvm::Constant *GetOrCreateLLVMFunction(
@@ -1458,9 +1525,18 @@ private:
       llvm::AttributeList ExtraAttrs = llvm::AttributeList(),
       ForDefinition_t IsForDefinition = NotForDefinition);
 
-  llvm::Constant *GetOrCreateMultiVersionResolver(GlobalDecl GD,
-                                                  llvm::Type *DeclTy,
-                                                  const FunctionDecl *FD);
+  // References to multiversion functions are resolved through an implicitly
+  // defined resolver function. This function is responsible for creating
+  // the resolver symbol for the provided declaration. The value returned
+  // will be for an ifunc (llvm::GlobalIFunc) if the current target supports
+  // that feature and for a regular function (llvm::GlobalValue) otherwise.
+  llvm::Constant *GetOrCreateMultiVersionResolver(GlobalDecl GD);
+
+  // In scenarios where a function is not known to be a multiversion function
+  // until a later declaration, it is sometimes necessary to change the
+  // previously created mangled name to align with requirements of whatever
+  // multiversion function kind the function is now known to be. This function
+  // is responsible for performing such mangled name updates.
   void UpdateMultiVersionNames(GlobalDecl GD, const FunctionDecl *FD,
                                StringRef &CurName);
 
@@ -1487,7 +1563,6 @@ private:
   void EmitAliasDefinition(GlobalDecl GD);
   void emitIFuncDefinition(GlobalDecl GD);
   void emitCPUDispatchDefinition(GlobalDecl GD);
-  void EmitTargetClonesResolver(GlobalDecl GD);
   void EmitObjCPropertyImplementations(const ObjCImplementationDecl *D);
   void EmitObjCIvarInitializations(ObjCImplementationDecl *D);
 
@@ -1553,6 +1628,7 @@ private:
   // registered by the atexit subroutine using unatexit.
   void unregisterGlobalDtorsWithUnAtExit();
 
+  /// Emit deferred multiversion function resolvers and associated variants.
   void emitMultiVersionFunctions();
 
   /// Emit any vtables which we deferred and still have a use for.
@@ -1568,6 +1644,16 @@ private:
   /// Emit the link options introduced by imported modules.
   void EmitModuleLinkOptions();
 
+  /// Helper function for EmitStaticExternCAliases() to redirect ifuncs that
+  /// have a resolver name that matches 'Elem' to instead resolve to the name of
+  /// 'CppFunc'. This redirection is necessary in cases where 'Elem' has a name
+  /// that will be emitted as an alias of the name bound to 'CppFunc'; ifuncs
+  /// may not reference aliases. Redirection is only performed if 'Elem' is only
+  /// used by ifuncs in which case, 'Elem' is destroyed. 'true' is returned if
+  /// redirection is successful, and 'false' is returned otherwise.
+  bool CheckAndReplaceExternCIFuncs(llvm::GlobalValue *Elem,
+                                    llvm::GlobalValue *CppFunc);
+
   /// Emit aliases for internal-linkage declarations inside "C" language
   /// linkage specifications, giving them the "expected" name where possible.
   void EmitStaticExternCAliases();