merge main into amd-staging

Merges commit '990bed64' into amd-staging

Change-Id: Ie4718fee0948abe7e867017089d1c5c8d65f3239

bolt/include/bolt/Profile/BoltAddressTranslation.h

@@ -90,7 +90,7 @@ class BoltAddressTranslation {
   std::error_code parse(raw_ostream &OS, StringRef Buf);
 
   /// Dump the parsed address translation tables
-  void dump(raw_ostream &OS);
+  void dump(raw_ostream &OS) const;
 
   /// If the maps are loaded in memory, perform the lookup to translate LBR
   /// addresses in function located at \p FuncAddress.
@@ -137,7 +137,8 @@ class BoltAddressTranslation {
   /// emitted for the start of the BB. More entries may be emitted to cover
   /// the location of calls or any instruction that may change control flow.
   void writeEntriesForBB(MapTy &Map, const BinaryBasicBlock &BB,
-                         uint64_t FuncInputAddress, uint64_t FuncOutputAddress);
+                         uint64_t FuncInputAddress,
+                         uint64_t FuncOutputAddress) const;
 
   /// Write the serialized address translation table for a function.
   template <bool Cold>
@@ -152,7 +153,7 @@ class BoltAddressTranslation {
 
   /// Returns the bitmask with set bits corresponding to indices of BRANCHENTRY
   /// entries in function address translation map.
-  APInt calculateBranchEntriesBitMask(MapTy &Map, size_t EqualElems);
+  APInt calculateBranchEntriesBitMask(MapTy &Map, size_t EqualElems) const;
 
   /// Calculate the number of equal offsets (output = input - skew) in the
   /// beginning of the function.

bolt/lib/Profile/BoltAddressTranslation.cpp

@@ -20,10 +20,9 @@ namespace bolt {
 
 const char *BoltAddressTranslation::SECTION_NAME = ".note.bolt_bat";
 
-void BoltAddressTranslation::writeEntriesForBB(MapTy &Map,
-                                               const BinaryBasicBlock &BB,
-                                               uint64_t FuncInputAddress,
-                                               uint64_t FuncOutputAddress) {
+void BoltAddressTranslation::writeEntriesForBB(
+    MapTy &Map, const BinaryBasicBlock &BB, uint64_t FuncInputAddress,
+    uint64_t FuncOutputAddress) const {
   const uint64_t BBOutputOffset =
       BB.getOutputAddressRange().first - FuncOutputAddress;
   const uint32_t BBInputOffset = BB.getInputOffset();
@@ -138,8 +137,8 @@ void BoltAddressTranslation::write(const BinaryContext &BC, raw_ostream &OS) {
             << " basic block hashes\n";
 }
 
-APInt BoltAddressTranslation::calculateBranchEntriesBitMask(MapTy &Map,
-                                                            size_t EqualElems) {
+APInt BoltAddressTranslation::calculateBranchEntriesBitMask(
+    MapTy &Map, size_t EqualElems) const {
   APInt BitMask(alignTo(EqualElems, 8), 0);
   size_t Index = 0;
   for (std::pair<const uint32_t, uint32_t> &KeyVal : Map) {
@@ -422,7 +421,7 @@ void BoltAddressTranslation::parseMaps(std::vector<uint64_t> &HotFuncs,
   }
 }
 
-void BoltAddressTranslation::dump(raw_ostream &OS) {
+void BoltAddressTranslation::dump(raw_ostream &OS) const {
   const size_t NumTables = Maps.size();
   OS << "BAT tables for " << NumTables << " functions:\n";
   for (const auto &MapEntry : Maps) {
@@ -447,11 +446,15 @@ void BoltAddressTranslation::dump(raw_ostream &OS) {
         OS << formatv(" hash: {0:x}", BBHashMap.getBBHash(Val));
       OS << "\n";
     }
-    if (IsHotFunction)
-      OS << "NumBlocks: " << NumBasicBlocksMap[Address] << '\n';
-    if (SecondaryEntryPointsMap.count(Address)) {
+    if (IsHotFunction) {
+      auto NumBasicBlocksIt = NumBasicBlocksMap.find(Address);
+      assert(NumBasicBlocksIt != NumBasicBlocksMap.end());
+      OS << "NumBlocks: " << NumBasicBlocksIt->second << '\n';
+    }
+    auto SecondaryEntryPointsIt = SecondaryEntryPointsMap.find(Address);
+    if (SecondaryEntryPointsIt != SecondaryEntryPointsMap.end()) {
       const std::vector<uint32_t> &SecondaryEntryPoints =
-          SecondaryEntryPointsMap[Address];
+          SecondaryEntryPointsIt->second;
       OS << SecondaryEntryPoints.size() << " secondary entry points:\n";
       for (uint32_t EntryPointOffset : SecondaryEntryPoints)
         OS << formatv("{0:x}\n", EntryPointOffset);

bolt/lib/Profile/StaleProfileMatching.cpp

@@ -30,6 +30,7 @@
 #include "llvm/ADT/Bitfields.h"
 #include "llvm/ADT/Hashing.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Timer.h"
 #include "llvm/Support/xxhash.h"
 #include "llvm/Transforms/Utils/SampleProfileInference.h"
 
@@ -42,6 +43,7 @@ using namespace llvm;
 
 namespace opts {
 
+extern cl::opt<bool> TimeRewrite;
 extern cl::OptionCategory BoltOptCategory;
 
 cl::opt<bool>
@@ -707,6 +709,10 @@ void assignProfile(BinaryFunction &BF,
 
 bool YAMLProfileReader::inferStaleProfile(
     BinaryFunction &BF, const yaml::bolt::BinaryFunctionProfile &YamlBF) {
+
+  NamedRegionTimer T("inferStaleProfile", "stale profile inference", "rewrite",
+                     "Rewrite passes", opts::TimeRewrite);
+
   if (!BF.hasCFG())
     return false;
 

bolt/lib/Rewrite/RewriteInstance.cpp

@@ -86,6 +86,7 @@ extern cl::list<std::string> ReorderData;
 extern cl::opt<bolt::ReorderFunctions::ReorderType> ReorderFunctions;
 extern cl::opt<bool> TerminalTrap;
 extern cl::opt<bool> TimeBuild;
+extern cl::opt<bool> TimeRewrite;
 
 cl::opt<bool> AllowStripped("allow-stripped",
                             cl::desc("allow processing of stripped binaries"),
@@ -235,11 +236,6 @@ UseGnuStack("use-gnu-stack",
   cl::ZeroOrMore,
   cl::cat(BoltCategory));
 
-static cl::opt<bool>
-    TimeRewrite("time-rewrite",
-                cl::desc("print time spent in rewriting passes"), cl::Hidden,
-                cl::cat(BoltCategory));
-
 static cl::opt<bool>
 SequentialDisassembly("sequential-disassembly",
   cl::desc("performs disassembly sequentially"),

bolt/lib/Utils/CommandLineOpts.cpp

@@ -179,6 +179,10 @@ cl::opt<bool> TimeOpts("time-opts",
                        cl::desc("print time spent in each optimization"),
                        cl::cat(BoltOptCategory));
 
+cl::opt<bool> TimeRewrite("time-rewrite",
+                          cl::desc("print time spent in rewriting passes"),
+                          cl::Hidden, cl::cat(BoltCategory));
+
 cl::opt<bool> UseOldText(
     "use-old-text",
     cl::desc("re-use space in old .text if possible (relocation mode)"),

clang/docs/ReleaseNotes.rst

@@ -766,6 +766,14 @@ Bug Fixes to C++ Support
   explicit object argument member functions. Fixes (#GH92188).
 - Fix a C++11 crash when a non-const non-static member function is defined out-of-line with
   the ``constexpr`` specifier. Fixes (#GH61004).
+- Clang no longer transforms dependent qualified names into implicit class member access expressions
+  until it can be determined whether the name is that of a non-static member.
+- Clang now correctly diagnoses when the current instantiation is used as an incomplete base class.
+- Clang no longer treats ``constexpr`` class scope function template specializations of non-static members
+  as implicitly ``const`` in language modes after C++11.
+- Fixed a crash when trying to emit captures in a lambda call operator with an explicit object
+  parameter that is called on a derived type of the lambda.
+  Fixes (#GH87210), (GH89541).
 
 Bug Fixes to AST Handling
 ^^^^^^^^^^^^^^^^^^^^^^^^^

clang/include/clang/AST/ASTContext.h

@@ -110,6 +110,9 @@ class VarTemplateDecl;
 class VTableContextBase;
 class XRayFunctionFilter;
 
+/// A simple array of base specifiers.
+typedef SmallVector<CXXBaseSpecifier *, 4> CXXCastPath;
+
 namespace Builtin {
 
 class Context;
@@ -1170,6 +1173,12 @@ class ASTContext : public RefCountedBase<ASTContext> {
   /// in device compilation.
   llvm::DenseSet<const FunctionDecl *> CUDAImplicitHostDeviceFunUsedByDevice;
 
+  /// For capturing lambdas with an explicit object parameter whose type is
+  /// derived from the lambda type, we need to perform derived-to-base
+  /// conversion so we can access the captures; the cast paths for that
+  /// are stored here.
+  llvm::DenseMap<const CXXMethodDecl *, CXXCastPath> LambdaCastPaths;
+
   ASTContext(LangOptions &LOpts, SourceManager &SM, IdentifierTable &idents,
              SelectorTable &sels, Builtin::Context &builtins,
              TranslationUnitKind TUKind);

clang/include/clang/Basic/DiagnosticParseKinds.td

@@ -1345,8 +1345,8 @@ def note_pragma_attribute_namespace_on_attribute : Note<
   "omit the namespace to add attributes to the most-recently"
   " pushed attribute group">;
 def warn_no_support_for_eval_method_source_on_m32 : Warning<
-  "Setting the floating point evaluation method to `source` on a target"
-  " without SSE is not supported.">, InGroup<Pragmas>;
+  "setting the floating point evaluation method to `source` on a target "
+  "without SSE is not supported">, InGroup<Pragmas>;
 // - #pragma __debug
 def warn_pragma_debug_dependent_argument : Warning<
   "%select{value|type}0-dependent expression passed as an argument to debug "

clang/include/clang/Basic/DiagnosticSemaKinds.td

@@ -7525,6 +7525,11 @@ def err_explicit_object_parameter_mutable: Error<
 def err_invalid_explicit_object_type_in_lambda: Error<
   "invalid explicit object parameter type %0 in lambda with capture; "
   "the type must be the same as, or derived from, the lambda">;
+def err_explicit_object_lambda_ambiguous_base : Error<
+  "lambda %0 is inaccessible due to ambiguity:%1">;
+def err_explicit_object_lambda_inaccessible_base : Error<
+  "invalid explicit object parameter type %0 in lambda with capture; "
+  "the type must derive publicly from the lambda">;
 
 def err_ref_qualifier_overload : Error<
   "cannot overload a member function %select{without a ref-qualifier|with "
@@ -11335,18 +11340,18 @@ def err_omp_reduction_vla_unsupported : Error<
 def err_omp_linear_distribute_var_non_loop_iteration : Error<
   "only loop iteration variables are allowed in 'linear' clause in distribute directives">;
 def warn_omp_non_trivial_type_mapped : Warning<
-  "Type %0 is not trivially copyable and not guaranteed to be mapped correctly">,
+  "type %0 is not trivially copyable and not guaranteed to be mapped correctly">,
   InGroup<OpenMPMapping>;
 def err_omp_requires_clause_redeclaration : Error <
-  "Only one %0 clause can appear on a requires directive in a single translation unit">;
+  "only one %0 clause can appear on a requires directive in a single translation unit">;
 def note_omp_requires_previous_clause : Note <
   "%0 clause previously used here">;
 def err_omp_directive_before_requires : Error <
   "'%0' region encountered before requires directive with '%1' clause">;
 def note_omp_requires_encountered_directive : Note <
   "'%0' previously encountered here">;
 def err_omp_device_ancestor_without_requires_reverse_offload : Error <
-  "Device clause with ancestor device-modifier used without specifying 'requires reverse_offload'">;
+  "device clause with ancestor device-modifier used without specifying 'requires reverse_offload'">;
 def err_omp_invalid_scope : Error <
   "'#pragma omp %0' directive must appear only in file scope">;
 def note_omp_invalid_length_on_this_ptr_mapping : Note <

clang/include/clang/Sema/Sema.h

@@ -7083,7 +7083,9 @@ class Sema final : public SemaBase {
       StorageClass SC, ArrayRef<ParmVarDecl *> Params,
       bool HasExplicitResultType);
 
-  void DiagnoseInvalidExplicitObjectParameterInLambda(CXXMethodDecl *Method);
+  /// Returns true if the explicit object parameter was invalid.
+  bool DiagnoseInvalidExplicitObjectParameterInLambda(CXXMethodDecl *Method,
+                                                      SourceLocation CallLoc);
 
   /// Perform initialization analysis of the init-capture and perform
   /// any implicit conversions such as an lvalue-to-rvalue conversion if

clang/lib/CodeGen/CGExpr.cpp

@@ -4676,7 +4676,8 @@ LValue CodeGenFunction::EmitMemberExpr(const MemberExpr *E) {
 LValue CodeGenFunction::EmitLValueForLambdaField(const FieldDecl *Field,
                                                  llvm::Value *ThisValue) {
   bool HasExplicitObjectParameter = false;
-  if (const auto *MD = dyn_cast_if_present<CXXMethodDecl>(CurCodeDecl)) {
+  const auto *MD = dyn_cast_if_present<CXXMethodDecl>(CurCodeDecl);
+  if (MD) {
     HasExplicitObjectParameter = MD->isExplicitObjectMemberFunction();
     assert(MD->getParent()->isLambda());
     assert(MD->getParent() == Field->getParent());
@@ -4693,6 +4694,17 @@ LValue CodeGenFunction::EmitLValueForLambdaField(const FieldDecl *Field,
     else
       LambdaLV = MakeAddrLValue(AddrOfExplicitObject,
                                 D->getType().getNonReferenceType());
+
+    // Make sure we have an lvalue to the lambda itself and not a derived class.
+    auto *ThisTy = D->getType().getNonReferenceType()->getAsCXXRecordDecl();
+    auto *LambdaTy = cast<CXXRecordDecl>(Field->getParent());
+    if (ThisTy != LambdaTy) {
+      const CXXCastPath &BasePathArray = getContext().LambdaCastPaths.at(MD);
+      Address Base = GetAddressOfBaseClass(
+          LambdaLV.getAddress(), ThisTy, BasePathArray.begin(),
+          BasePathArray.end(), /*NullCheckValue=*/false, SourceLocation());
+      LambdaLV = MakeAddrLValue(Base, QualType{LambdaTy->getTypeForDecl(), 0});
+    }
   } else {
     QualType LambdaTagType = getContext().getTagDeclType(Field->getParent());
     LambdaLV = MakeNaturalAlignAddrLValue(ThisValue, LambdaTagType);

clang/lib/Sema/SemaLambda.cpp

@@ -12,6 +12,7 @@
 #include "clang/Sema/SemaLambda.h"
 #include "TypeLocBuilder.h"
 #include "clang/AST/ASTLambda.h"
+#include "clang/AST/CXXInheritance.h"
 #include "clang/AST/ExprCXX.h"
 #include "clang/Basic/TargetInfo.h"
 #include "clang/Sema/DeclSpec.h"
@@ -386,30 +387,69 @@ buildTypeForLambdaCallOperator(Sema &S, clang::CXXRecordDecl *Class,
 //  parameter, if any, of the lambda's function call operator (possibly
 //  instantiated from a function call operator template) shall be either:
 //  - the closure type,
-//  - class type derived from the closure type, or
+//  - class type publicly and unambiguously derived from the closure type, or
 //  - a reference to a possibly cv-qualified such type.
-void Sema::DiagnoseInvalidExplicitObjectParameterInLambda(
-    CXXMethodDecl *Method) {
+bool Sema::DiagnoseInvalidExplicitObjectParameterInLambda(
+    CXXMethodDecl *Method, SourceLocation CallLoc) {
   if (!isLambdaCallWithExplicitObjectParameter(Method))
-    return;
+    return false;
   CXXRecordDecl *RD = Method->getParent();
   if (Method->getType()->isDependentType())
-    return;
+    return false;
   if (RD->isCapturelessLambda())
-    return;
-  QualType ExplicitObjectParameterType = Method->getParamDecl(0)
-                                             ->getType()
+    return false;
+
+  ParmVarDecl *Param = Method->getParamDecl(0);
+  QualType ExplicitObjectParameterType = Param->getType()
                                              .getNonReferenceType()
                                              .getUnqualifiedType()
                                              .getDesugaredType(getASTContext());
   QualType LambdaType = getASTContext().getRecordType(RD);
   if (LambdaType == ExplicitObjectParameterType)
-    return;
-  if (IsDerivedFrom(RD->getLocation(), ExplicitObjectParameterType, LambdaType))
-    return;
-  Diag(Method->getParamDecl(0)->getLocation(),
-       diag::err_invalid_explicit_object_type_in_lambda)
-      << ExplicitObjectParameterType;
+    return false;
+
+  // Don't check the same instantiation twice.
+  //
+  // If this call operator is ill-formed, there is no point in issuing
+  // a diagnostic every time it is called because the problem is in the
+  // definition of the derived type, not at the call site.
+  //
+  // FIXME: Move this check to where we instantiate the method? This should
+  // be possible, but the naive approach of just marking the method as invalid
+  // leads to us emitting more diagnostics than we should have to for this case
+  // (1 error here *and* 1 error about there being no matching overload at the
+  // call site). It might be possible to avoid that by also checking if there
+  // is an empty cast path for the method stored in the context (signalling that
+  // we've already diagnosed it) and then just not building the call, but that
+  // doesn't really seem any simpler than diagnosing it at the call site...
+  if (auto It = Context.LambdaCastPaths.find(Method);
+      It != Context.LambdaCastPaths.end())
+    return It->second.empty();
+
+  CXXCastPath &Path = Context.LambdaCastPaths[Method];
+  CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true,
+                     /*DetectVirtual=*/false);
+  if (!IsDerivedFrom(RD->getLocation(), ExplicitObjectParameterType, LambdaType,
+                     Paths)) {
+    Diag(Param->getLocation(), diag::err_invalid_explicit_object_type_in_lambda)
+        << ExplicitObjectParameterType;
+    return true;
+  }
+
+  if (Paths.isAmbiguous(LambdaType->getCanonicalTypeUnqualified())) {
+    std::string PathsDisplay = getAmbiguousPathsDisplayString(Paths);
+    Diag(CallLoc, diag::err_explicit_object_lambda_ambiguous_base)
+        << LambdaType << PathsDisplay;
+    return true;
+  }
+
+  if (CheckBaseClassAccess(CallLoc, LambdaType, ExplicitObjectParameterType,
+                           Paths.front(),
+                           diag::err_explicit_object_lambda_inaccessible_base))
+    return true;
+
+  BuildBasePathArray(Paths, Path);
+  return false;
 }
 
 void Sema::handleLambdaNumbering(

clang/lib/Sema/SemaOverload.cpp

@@ -6472,17 +6472,20 @@ ExprResult Sema::InitializeExplicitObjectArgument(Sema &S, Expr *Obj,
       Obj->getExprLoc(), Obj);
 }
 
-static void PrepareExplicitObjectArgument(Sema &S, CXXMethodDecl *Method,
+static bool PrepareExplicitObjectArgument(Sema &S, CXXMethodDecl *Method,
                                           Expr *Object, MultiExprArg &Args,
                                           SmallVectorImpl<Expr *> &NewArgs) {
   assert(Method->isExplicitObjectMemberFunction() &&
          "Method is not an explicit member function");
   assert(NewArgs.empty() && "NewArgs should be empty");
+
   NewArgs.reserve(Args.size() + 1);
   Expr *This = GetExplicitObjectExpr(S, Object, Method);
   NewArgs.push_back(This);
   NewArgs.append(Args.begin(), Args.end());
   Args = NewArgs;
+  return S.DiagnoseInvalidExplicitObjectParameterInLambda(
+      Method, Object->getBeginLoc());
 }
 
 /// Determine whether the provided type is an integral type, or an enumeration
@@ -15612,8 +15615,10 @@ ExprResult Sema::BuildCallToMemberFunction(Scope *S, Expr *MemExprE,
   CallExpr *TheCall = nullptr;
   llvm::SmallVector<Expr *, 8> NewArgs;
   if (Method->isExplicitObjectMemberFunction()) {
-    PrepareExplicitObjectArgument(*this, Method, MemExpr->getBase(), Args,
-                                  NewArgs);
+    if (PrepareExplicitObjectArgument(*this, Method, MemExpr->getBase(), Args,
+                                      NewArgs))
+      return ExprError();
+
     // Build the actual expression node.
     ExprResult FnExpr =
         CreateFunctionRefExpr(*this, Method, FoundDecl, MemExpr,
@@ -15927,9 +15932,7 @@ Sema::BuildCallToObjectOfClassType(Scope *S, Expr *Obj,
   // Initialize the object parameter.
   llvm::SmallVector<Expr *, 8> NewArgs;
   if (Method->isExplicitObjectMemberFunction()) {
-    // FIXME: we should do that during the definition of the lambda when we can.
-    DiagnoseInvalidExplicitObjectParameterInLambda(Method);
-    PrepareExplicitObjectArgument(*this, Method, Obj, Args, NewArgs);
+    IsError |= PrepareExplicitObjectArgument(*this, Method, Obj, Args, NewArgs);
   } else {
     ExprResult ObjRes = PerformImplicitObjectArgumentInitialization(
         Object.get(), /*Qualifier=*/nullptr, Best->FoundDecl, Method);