SPIRV-LLVM-Translator pulldown (WW39)

clang-tools-extra/clang-include-fixer/IncludeFixer.cpp

@@ -245,7 +245,7 @@ clang::TypoCorrection IncludeFixerSemaSource::CorrectTypo(
     // parent_path.
     // FIXME: Don't rely on source text.
     const char *End = Source.end();
-    while (isIdentifierBody(*End) || *End == ':')
+    while (isAsciiIdentifierContinue(*End) || *End == ':')
       ++End;
 
     return std::string(Source.begin(), End);

clang-tools-extra/clang-tidy/google/IntegerTypesCheck.cpp

@@ -129,7 +129,7 @@ void IntegerTypesCheck::check(const MatchFinder::MatchResult &Result) {
   const StringRef Port = "unsigned short port";
   const char *Data = Result.SourceManager->getCharacterData(Loc);
   if (!std::strncmp(Data, Port.data(), Port.size()) &&
-      !isIdentifierBody(Data[Port.size()]))
+      !isAsciiIdentifierContinue(Data[Port.size()]))
     return;
 
   std::string Replacement =

clang-tools-extra/clang-tidy/readability/CMakeLists.txt

@@ -7,6 +7,7 @@ add_clang_library(clangTidyReadabilityModule
   AvoidConstParamsInDecls.cpp
   BracesAroundStatementsCheck.cpp
   ConstReturnTypeCheck.cpp
+  ContainerDataPointerCheck.cpp
   ContainerSizeEmptyCheck.cpp
   ConvertMemberFunctionsToStatic.cpp
   DeleteNullPointerCheck.cpp

clang-tools-extra/clang-tidy/readability/ContainerDataPointerCheck.cpp

@@ -0,0 +1,117 @@
+//===--- ContainerDataPointerCheck.cpp - clang-tidy -----------------------===//
+//
+// 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 "ContainerDataPointerCheck.h"
+
+#include "clang/Lex/Lexer.h"
+#include "llvm/ADT/StringRef.h"
+
+using namespace clang::ast_matchers;
+
+namespace clang {
+namespace tidy {
+namespace readability {
+ContainerDataPointerCheck::ContainerDataPointerCheck(StringRef Name,
+                                                     ClangTidyContext *Context)
+    : ClangTidyCheck(Name, Context) {}
+
+void ContainerDataPointerCheck::registerMatchers(MatchFinder *Finder) {
+  const auto Record =
+      cxxRecordDecl(
+          isSameOrDerivedFrom(
+              namedDecl(
+                  has(cxxMethodDecl(isPublic(), hasName("data")).bind("data")))
+                  .bind("container")))
+          .bind("record");
+
+  const auto NonTemplateContainerType =
+      qualType(hasUnqualifiedDesugaredType(recordType(hasDeclaration(Record))));
+  const auto TemplateContainerType =
+      qualType(hasUnqualifiedDesugaredType(templateSpecializationType(
+          hasDeclaration(classTemplateDecl(has(Record))))));
+
+  const auto Container =
+      qualType(anyOf(NonTemplateContainerType, TemplateContainerType));
+
+  Finder->addMatcher(
+      unaryOperator(
+          unless(isExpansionInSystemHeader()), hasOperatorName("&"),
+          hasUnaryOperand(anyOf(
+              ignoringParenImpCasts(
+                  cxxOperatorCallExpr(
+                      callee(cxxMethodDecl(hasName("operator[]"))
+                                 .bind("operator[]")),
+                      argumentCountIs(2),
+                      hasArgument(
+                          0,
+                          anyOf(ignoringParenImpCasts(
+                                    declRefExpr(
+                                        to(varDecl(anyOf(
+                                            hasType(Container),
+                                            hasType(references(Container))))))
+                                        .bind("var")),
+                                ignoringParenImpCasts(hasDescendant(
+                                    declRefExpr(
+                                        to(varDecl(anyOf(
+                                            hasType(Container),
+                                            hasType(pointsTo(Container)),
+                                            hasType(references(Container))))))
+                                        .bind("var"))))),
+                      hasArgument(1,
+                                  ignoringParenImpCasts(
+                                      integerLiteral(equals(0)).bind("zero"))))
+                      .bind("operator-call")),
+              ignoringParenImpCasts(
+                  cxxMemberCallExpr(
+                      hasDescendant(
+                          declRefExpr(to(varDecl(anyOf(
+                                          hasType(Container),
+                                          hasType(references(Container))))))
+                              .bind("var")),
+                      argumentCountIs(1),
+                      hasArgument(0,
+                                  ignoringParenImpCasts(
+                                      integerLiteral(equals(0)).bind("zero"))))
+                      .bind("member-call")),
+              ignoringParenImpCasts(
+                  arraySubscriptExpr(
+                      hasLHS(ignoringParenImpCasts(
+                          declRefExpr(to(varDecl(anyOf(
+                                          hasType(Container),
+                                          hasType(references(Container))))))
+                              .bind("var"))),
+                      hasRHS(ignoringParenImpCasts(
+                          integerLiteral(equals(0)).bind("zero"))))
+                      .bind("array-subscript")))))
+          .bind("address-of"),
+      this);
+}
+
+void ContainerDataPointerCheck::check(const MatchFinder::MatchResult &Result) {
+  const auto *UO = Result.Nodes.getNodeAs<UnaryOperator>("address-of");
+  const auto *DRE = Result.Nodes.getNodeAs<DeclRefExpr>("var");
+
+  std::string ReplacementText;
+  ReplacementText = std::string(Lexer::getSourceText(
+      CharSourceRange::getTokenRange(DRE->getSourceRange()),
+      *Result.SourceManager, getLangOpts()));
+  if (DRE->getType()->isPointerType())
+    ReplacementText += "->data()";
+  else
+    ReplacementText += ".data()";
+
+  FixItHint Hint =
+      FixItHint::CreateReplacement(UO->getSourceRange(), ReplacementText);
+  diag(UO->getBeginLoc(),
+       "'data' should be used for accessing the data pointer instead of taking "
+       "the address of the 0-th element")
+      << Hint;
+}
+} // namespace readability
+} // namespace tidy
+} // namespace clang

clang-tools-extra/clang-tidy/readability/ContainerDataPointerCheck.h

@@ -0,0 +1,45 @@
+//===--- ContainerDataPointerCheck.h - clang-tidy ---------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_CONTAINERDATAPOINTERCHECK_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_CONTAINERDATAPOINTERCHECK_H
+
+#include "../ClangTidyCheck.h"
+
+namespace clang {
+namespace tidy {
+namespace readability {
+/// Checks whether a call to `operator[]` and `&` can be replaced with a call to
+/// `data()`.
+///
+/// This only replaces the case where the offset being accessed through the
+/// subscript operation is a known constant 0.  This avoids a potential invalid
+/// memory access when the container is empty.  Cases where the constant is not
+/// explictly zero can be addressed through the clang static analyzer, and those
+/// which cannot be statically identified can be caught using UBSan.
+class ContainerDataPointerCheck : public ClangTidyCheck {
+public:
+  ContainerDataPointerCheck(StringRef Name, ClangTidyContext *Context);
+
+  bool isLanguageVersionSupported(const LangOptions &LO) const override {
+    return LO.CPlusPlus11;
+  }
+
+  void registerMatchers(ast_matchers::MatchFinder *Finder) override;
+
+  void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
+
+  llvm::Optional<TraversalKind> getCheckTraversalKind() const override {
+    return TK_IgnoreUnlessSpelledInSource;
+  }
+};
+} // namespace readability
+} // namespace tidy
+} // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_CONTAINERDATAPOINTERCHECK_H

clang-tools-extra/clang-tidy/readability/ReadabilityTidyModule.cpp

@@ -12,6 +12,7 @@
 #include "AvoidConstParamsInDecls.h"
 #include "BracesAroundStatementsCheck.h"
 #include "ConstReturnTypeCheck.h"
+#include "ContainerDataPointerCheck.h"
 #include "ContainerSizeEmptyCheck.h"
 #include "ConvertMemberFunctionsToStatic.h"
 #include "DeleteNullPointerCheck.h"
@@ -62,6 +63,8 @@ class ReadabilityModule : public ClangTidyModule {
         "readability-braces-around-statements");
     CheckFactories.registerCheck<ConstReturnTypeCheck>(
         "readability-const-return-type");
+    CheckFactories.registerCheck<ContainerDataPointerCheck>(
+        "readability-container-data-pointer");
     CheckFactories.registerCheck<ContainerSizeEmptyCheck>(
         "readability-container-size-empty");
     CheckFactories.registerCheck<ConvertMemberFunctionsToStatic>(

clang-tools-extra/clang-tidy/utils/RenamerClangTidyCheck.cpp

@@ -464,7 +464,7 @@ void RenamerClangTidyCheck::check(const MatchFinder::MatchResult &Result) {
         Failure.FixStatus = ShouldFixStatus::ConflictsWithKeyword;
       else if (Ident->hasMacroDefinition())
         Failure.FixStatus = ShouldFixStatus::ConflictsWithMacroDefinition;
-    } else if (!isValidIdentifier(Info.Fixup)) {
+    } else if (!isValidAsciiIdentifier(Info.Fixup)) {
       Failure.FixStatus = ShouldFixStatus::FixInvalidIdentifier;
     }
 

clang-tools-extra/clangd/CodeComplete.cpp

@@ -1842,14 +1842,14 @@ CompletionPrefix guessCompletionPrefix(llvm::StringRef Content,
   CompletionPrefix Result;
 
   // Consume the unqualified name. We only handle ASCII characters.
-  // isIdentifierBody will let us match "0invalid", but we don't mind.
-  while (!Rest.empty() && isIdentifierBody(Rest.back()))
+  // isAsciiIdentifierContinue will let us match "0invalid", but we don't mind.
+  while (!Rest.empty() && isAsciiIdentifierContinue(Rest.back()))
     Rest = Rest.drop_back();
   Result.Name = Content.slice(Rest.size(), Offset);
 
   // Consume qualifiers.
   while (Rest.consume_back("::") && !Rest.endswith(":")) // reject ::::
-    while (!Rest.empty() && isIdentifierBody(Rest.back()))
+    while (!Rest.empty() && isAsciiIdentifierContinue(Rest.back()))
       Rest = Rest.drop_back();
   Result.Qualifier =
       Content.slice(Rest.size(), Result.Name.begin() - Content.begin());
@@ -1874,9 +1874,10 @@ CodeCompleteResult codeComplete(PathRef FileName, Position Pos,
              ? std::move(Flow).runWithoutSema(ParseInput.Contents, *Offset,
                                               *ParseInput.TFS)
              : std::move(Flow).run({FileName, *Offset, *Preamble,
-                                    // We want to serve code completions with
-                                    // low latency, so don't bother patching.
-                                    /*PreamblePatch=*/llvm::None, ParseInput});
+                                    /*PreamblePatch=*/
+                                    PreamblePatch::createMacroPatch(
+                                        FileName, ParseInput, *Preamble),
+                                    ParseInput});
 }
 
 SignatureHelp signatureHelp(PathRef FileName, Position Pos,
@@ -1898,7 +1899,8 @@ SignatureHelp signatureHelp(PathRef FileName, Position Pos,
                                                Result),
       Options,
       {FileName, *Offset, Preamble,
-       PreamblePatch::create(FileName, ParseInput, Preamble), ParseInput});
+       PreamblePatch::createFullPatch(FileName, ParseInput, Preamble),
+       ParseInput});
   return Result;
 }
 
@@ -2057,8 +2059,8 @@ bool allowImplicitCompletion(llvm::StringRef Content, unsigned Offset) {
     return true;
 
   // Complete words. Give non-ascii characters the benefit of the doubt.
-  return !Content.empty() &&
-         (isIdentifierBody(Content.back()) || !llvm::isASCII(Content.back()));
+  return !Content.empty() && (isAsciiIdentifierContinue(Content.back()) ||
+                              !llvm::isASCII(Content.back()));
 }
 
 } // namespace clangd

clang-tools-extra/clangd/CompileCommands.cpp

@@ -198,22 +198,26 @@ CommandMangler CommandMangler::forTests() { return CommandMangler(); }
 void CommandMangler::adjust(std::vector<std::string> &Cmd,
                             llvm::StringRef File) const {
   trace::Span S("AdjustCompileFlags");
+  // Most of the modifications below assumes the Cmd starts with a driver name.
+  // We might consider injecting a generic driver name like "cc" or "c++", but
+  // a Cmd missing the driver is probably rare enough in practice and errnous.
+  if (Cmd.empty())
+    return;
   auto &OptTable = clang::driver::getDriverOptTable();
   // OriginalArgs needs to outlive ArgList.
   llvm::SmallVector<const char *, 16> OriginalArgs;
   OriginalArgs.reserve(Cmd.size());
   for (const auto &S : Cmd)
     OriginalArgs.push_back(S.c_str());
-  bool IsCLMode =
-      !OriginalArgs.empty() &&
-      driver::IsClangCL(driver::getDriverMode(
-          OriginalArgs[0], llvm::makeArrayRef(OriginalArgs).slice(1)));
+  bool IsCLMode = driver::IsClangCL(driver::getDriverMode(
+      OriginalArgs[0], llvm::makeArrayRef(OriginalArgs).slice(1)));
   // ParseArgs propagates missig arg/opt counts on error, but preserves
   // everything it could parse in ArgList. So we just ignore those counts.
   unsigned IgnoredCount;
   // Drop the executable name, as ParseArgs doesn't expect it. This means
   // indices are actually of by one between ArgList and OriginalArgs.
-  auto ArgList = OptTable.ParseArgs(
+  llvm::opt::InputArgList ArgList;
+  ArgList = OptTable.ParseArgs(
       llvm::makeArrayRef(OriginalArgs).drop_front(), IgnoredCount, IgnoredCount,
       /*FlagsToInclude=*/
       IsCLMode ? (driver::options::CLOption | driver::options::CoreOption)

clang-tools-extra/clangd/Compiler.cpp

@@ -83,6 +83,8 @@ void disableUnsupportedOptions(CompilerInvocation &CI) {
 std::unique_ptr<CompilerInvocation>
 buildCompilerInvocation(const ParseInputs &Inputs, clang::DiagnosticConsumer &D,
                         std::vector<std::string> *CC1Args) {
+  if (Inputs.CompileCommand.CommandLine.empty())
+    return nullptr;
   std::vector<const char *> ArgStrs;
   for (const auto &S : Inputs.CompileCommand.CommandLine)
     ArgStrs.push_back(S.c_str());

clang-tools-extra/clangd/FindTarget.cpp

@@ -94,6 +94,16 @@ const NamedDecl *getTemplatePattern(const NamedDecl *D) {
   return nullptr;
 }
 
+// Returns true if the `TypedefNameDecl` should not be reported.
+bool shouldSkipTypedef(const TypedefNameDecl *TD) {
+  // These should be treated as keywords rather than decls - the typedef is an
+  // odd implementation detail.
+  if (TD == TD->getASTContext().getObjCInstanceTypeDecl() ||
+      TD == TD->getASTContext().getObjCIdDecl())
+    return true;
+  return false;
+}
+
 // TargetFinder locates the entities that an AST node refers to.
 //
 // Typically this is (possibly) one declaration and (possibly) one type, but
@@ -395,6 +405,8 @@ struct TargetFinder {
         }
       }
       void VisitTypedefType(const TypedefType *TT) {
+        if (shouldSkipTypedef(TT->getDecl()))
+          return;
         Outer.add(TT->getDecl(), Flags);
       }
       void
@@ -903,6 +915,8 @@ refInTypeLoc(TypeLoc L, const HeuristicResolver *Resolver) {
     }
 
     void VisitTypedefTypeLoc(TypedefTypeLoc L) {
+      if (shouldSkipTypedef(L.getTypedefNameDecl()))
+        return;
       Refs.push_back(ReferenceLoc{NestedNameSpecifierLoc(),
                                   L.getNameLoc(),
                                   /*IsDecl=*/false,