merge main into amd-staging

xfails:
  llvm/test/CodeGen/AMDGPU/amdgpu-spill-cfi-saved-regs.ll
  llvm/test/CodeGen/AMDGPU/debug-frame.ll

Author: ronlieb

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

@@ -215,6 +215,19 @@ void UseRangesCheck::check(const MatchFinder::MatchResult &Result) {
     const auto *Call = Result.Nodes.getNodeAs<CallExpr>(Buffer);
     if (!Call)
       continue;
+
+    // FIXME: This check specifically handles `CXXNullPtrLiteralExpr`, but
+    // a more general solution might be needed.
+    if (Function->getName() == "find") {
+      const unsigned ValueArgIndex = 2;
+      if (Call->getNumArgs() <= ValueArgIndex)
+        continue;
+      const Expr *ValueExpr =
+          Call->getArg(ValueArgIndex)->IgnoreParenImpCasts();
+      if (isa<CXXNullPtrLiteralExpr>(ValueExpr))
+        return;
+    }
+
     auto Diag = createDiag(*Call);
     if (auto ReplaceName = Replacer->getReplaceName(*Function))
       Diag << FixItHint::CreateReplacement(Call->getCallee()->getSourceRange(),

clang-tools-extra/clangd/Config.h

@@ -59,13 +59,18 @@ struct Config {
     std::optional<std::string> FixedCDBPath;
   };
 
+  enum class BuiltinHeaderPolicy { Clangd, QueryDriver };
   /// Controls how the compile command for the current file is determined.
   struct {
     /// Edits to apply to the compile command, in sequence.
     std::vector<llvm::unique_function<void(std::vector<std::string> &) const>>
         Edits;
     /// Where to search for compilation databases for this file's flags.
     CDBSearchSpec CDBSearch = {CDBSearchSpec::Ancestors, std::nullopt};
+
+    /// Whether to use clangd's own builtin headers, or ones from the system
+    /// include extractor, if available.
+    BuiltinHeaderPolicy BuiltinHeaders = BuiltinHeaderPolicy::Clangd;
   } CompileFlags;
 
   enum class BackgroundPolicy { Build, Skip };

clang-tools-extra/clangd/ConfigCompile.cpp

@@ -290,6 +290,18 @@ struct FragmentCompiler {
       });
     }
 
+    if (F.BuiltinHeaders) {
+      if (auto Val =
+              compileEnum<Config::BuiltinHeaderPolicy>("BuiltinHeaders",
+                                                       *F.BuiltinHeaders)
+                  .map("Clangd", Config::BuiltinHeaderPolicy::Clangd)
+                  .map("QueryDriver", Config::BuiltinHeaderPolicy::QueryDriver)
+                  .value())
+        Out.Apply.push_back([Val](const Params &, Config &C) {
+          C.CompileFlags.BuiltinHeaders = *Val;
+        });
+    }
+
     if (F.CompilationDatabase) {
       std::optional<Config::CDBSearchSpec> Spec;
       if (**F.CompilationDatabase == "Ancestors") {

clang-tools-extra/clangd/ConfigFragment.h

@@ -170,6 +170,14 @@ struct Fragment {
     /// - Ancestors: search all parent directories (the default)
     /// - std::nullopt: do not use a compilation database, just default flags.
     std::optional<Located<std::string>> CompilationDatabase;
+
+    /// Controls whether Clangd should use its own built-in system headers (like
+    /// stddef.h), or use the system headers from the query driver. Use the
+    /// option value 'Clangd' (default) to indicate Clangd's headers, and use
+    /// 'QueryDriver' to indicate QueryDriver's headers. `Clangd` is the
+    /// fallback if no query driver is supplied or if the query driver regex
+    /// string fails to match the compiler used in the CDB.
+    std::optional<Located<std::string>> BuiltinHeaders;
   };
   CompileFlagsBlock CompileFlags;
 

clang-tools-extra/clangd/ConfigYAML.cpp

@@ -104,6 +104,10 @@ class Parser {
       if (auto Values = scalarValues(N))
         F.Remove = std::move(*Values);
     });
+    Dict.handle("BuiltinHeaders", [&](Node &N) {
+      if (auto BuiltinHeaders = scalarValue(N, "BuiltinHeaders"))
+        F.BuiltinHeaders = *BuiltinHeaders;
+    });
     Dict.handle("CompilationDatabase", [&](Node &N) {
       F.CompilationDatabase = scalarValue(N, "CompilationDatabase");
     });

clang-tools-extra/clangd/SystemIncludeExtractor.cpp

@@ -30,6 +30,7 @@
 // in the paths that are explicitly included by the user.
 
 #include "CompileCommands.h"
+#include "Config.h"
 #include "GlobalCompilationDatabase.h"
 #include "support/Logger.h"
 #include "support/Threading.h"
@@ -401,22 +402,30 @@ extractSystemIncludesAndTarget(const DriverArgs &InputArgs,
   if (!Info)
     return std::nullopt;
 
-  // The built-in headers are tightly coupled to parser builtins.
-  // (These are clang's "resource dir", GCC's GCC_INCLUDE_DIR.)
-  // We should keep using clangd's versions, so exclude the queried builtins.
-  // They're not specially marked in the -v output, but we can get the path
-  // with `$DRIVER -print-file-name=include`.
-  if (auto BuiltinHeaders =
-          run({Driver, "-print-file-name=include"}, /*OutputIsStderr=*/false)) {
-    auto Path = llvm::StringRef(*BuiltinHeaders).trim();
-    if (!Path.empty() && llvm::sys::path::is_absolute(Path)) {
-      auto Size = Info->SystemIncludes.size();
-      llvm::erase(Info->SystemIncludes, Path);
-      vlog("System includes extractor: builtin headers {0} {1}", Path,
-           (Info->SystemIncludes.size() != Size)
-               ? "excluded"
-               : "not found in driver's response");
+  switch (Config::current().CompileFlags.BuiltinHeaders) {
+  case Config::BuiltinHeaderPolicy::Clangd: {
+    // The built-in headers are tightly coupled to parser builtins.
+    // (These are clang's "resource dir", GCC's GCC_INCLUDE_DIR.)
+    // We should keep using clangd's versions, so exclude the queried
+    // builtins. They're not specially marked in the -v output, but we can
+    // get the path with `$DRIVER -print-file-name=include`.
+    if (auto BuiltinHeaders = run({Driver, "-print-file-name=include"},
+                                  /*OutputIsStderr=*/false)) {
+      auto Path = llvm::StringRef(*BuiltinHeaders).trim();
+      if (!Path.empty() && llvm::sys::path::is_absolute(Path)) {
+        auto Size = Info->SystemIncludes.size();
+        llvm::erase(Info->SystemIncludes, Path);
+        vlog("System includes extractor: builtin headers {0} {1}", Path,
+             (Info->SystemIncludes.size() != Size)
+                 ? "excluded"
+                 : "not found in driver's response");
+      }
     }
+    break;
+  }
+  case Config::BuiltinHeaderPolicy::QueryDriver:
+    vlog("System includes extractor: Using builtin headers from query driver.");
+    break;
   }
 
   log("System includes extractor: successfully executed {0}\n\tgot includes: "

clang-tools-extra/docs/ReleaseNotes.rst

@@ -58,6 +58,9 @@ Semantic Highlighting
 Compile flags
 ^^^^^^^^^^^^^
 
+- Added `BuiltinHeaders` config key which controls whether clangd's built-in
+  headers are used or ones extracted from the driver.
+
 Hover
 ^^^^^
 
@@ -112,7 +115,7 @@ Changes in existing checks
   <clang-tidy/checks/bugprone/unchecked-optional-access>` fixing false
   positives from smart pointer accessors repeated in checking ``has_value``
   and accessing ``value``. The option `IgnoreSmartPointerDereference` should
-  no longer be needed and will be removed. Also fixing false positive from 
+  no longer be needed and will be removed. Also fixing false positive from
   const reference accessors to objects containing optional member.
 
 - Improved :doc:`bugprone-unsafe-functions
@@ -128,14 +131,18 @@ Changes in existing checks
 - Improved :doc:`misc-redundant-expression
   <clang-tidy/checks/misc/redundant-expression>` check by providing additional
   examples and fixing some macro related false positives.
+  
+- Improved :doc:`modernize-use-ranges
+  <clang-tidy/checks/modernize/use-ranges>` check by updating suppress 
+  warnings logic for ``nullptr`` in ``std::find``.
 
 - Improved :doc:`misc-use-internal-linkage
   <clang-tidy/checks/misc/use-internal-linkage>` check by fix false positives
   for function or variable in header file which contains macro expansion.
 
 - Improved :doc:`performance/unnecessary-value-param
   <clang-tidy/checks/performance/unnecessary-value-param>` check performance by
-  tolerating fix-it breaking compilation when functions is used as pointers 
+  tolerating fix-it breaking compilation when functions is used as pointers
   to avoid matching usage of functions within the current compilation unit.
 
 - Improved :doc:`performance-move-const-arg

clang-tools-extra/test/clang-tidy/checkers/modernize/use-ranges.cpp

@@ -1,14 +1,25 @@
-// RUN: %check_clang_tidy -std=c++20 %s modernize-use-ranges %t -- -- -I %S/Inputs/use-ranges/
-// RUN: %check_clang_tidy -std=c++23 %s modernize-use-ranges %t -check-suffixes=,CPP23 -- -I %S/Inputs/use-ranges/
+// RUN: %check_clang_tidy -std=c++20 %s modernize-use-ranges %t -- -- -I %S/Inputs/
+// RUN: %check_clang_tidy -std=c++23 %s modernize-use-ranges %t -check-suffixes=,CPP23 -- -I %S/Inputs/
+// Example: ./check_clang_tidy.py -std=c++20 checkers/modernize/use-ranges.cpp modernize-use-ranges temp.txt -- -- -I ~/llvm-project/clang-tools-extra/test/clang-tidy/checkers/modernize/Inputs/
 
 // CHECK-FIXES: #include <algorithm>
 // CHECK-FIXES-CPP23: #include <numeric>
 // CHECK-FIXES: #include <ranges>
 
-#include "fake_std.h"
+#include "use-ranges/fake_std.h"
+#include "smart-ptr/unique_ptr.h"
 
 void Positives() {
   std::vector<int> I, J;
+  std::vector<std::unique_ptr<int>> K;
+
+  // Expect to have no check messages
+  std::find(K.begin(), K.end(), nullptr);
+
+  std::find(K.begin(), K.end(), std::unique_ptr<int>());
+  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use a ranges version of this algorithm
+  // CHECK-FIXES: std::ranges::find(K, std::unique_ptr<int>());
+
   std::find(I.begin(), I.end(), 0);
   // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use a ranges version of this algorithm
   // CHECK-FIXES: std::ranges::find(I, 0);
@@ -76,6 +87,15 @@ void Positives() {
 
 void Reverse(){
   std::vector<int> I, J;
+  std::vector<std::unique_ptr<int>> K;
+  
+  // Expect to have no check messages
+  std::find(K.rbegin(), K.rend(), nullptr);
+
+  std::find(K.rbegin(), K.rend(), std::unique_ptr<int>());
+  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use a ranges version of this algorithm
+  // CHECK-FIXES: std::ranges::find(std::ranges::reverse_view(K), std::unique_ptr<int>());
+
   std::find(I.rbegin(), I.rend(), 0);
   // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use a ranges version of this algorithm
   // CHECK-FIXES: std::ranges::find(std::ranges::reverse_view(I), 0);

clang/docs/analyzer/checkers.rst

@@ -3522,6 +3522,18 @@ Raw pointers and references to an object which supports CheckedPtr or CheckedRef
 
 See `WebKit Guidelines for Safer C++ Programming <https://github.com/WebKit/WebKit/wiki/Safer-CPP-Guidelines>`_ for details.
 
+alpha.webkit.UnretainedLambdaCapturesChecker
+""""""""""""""""""""""""""""""""""""""""""""
+Raw pointers and references to NS or CF types can't be captured in lambdas. Only RetainPtr is allowed for CF types regardless of whether ARC is enabled or disabled, and only RetainPtr is allowed for NS types when ARC is disabled.
+
+.. code-block:: cpp
+
+ void foo(NSObject *a, NSObject *b) {
+   [&, a](){ // warn about 'a'
+     do_something(b); // warn about 'b'
+   };
+ };
+
 .. _alpha-webkit-UncountedCallArgsChecker:
 
 alpha.webkit.UncountedCallArgsChecker

clang/include/clang/Basic/DiagnosticParseKinds.td

@@ -1817,5 +1817,9 @@ def ext_hlsl_access_specifiers : ExtWarn<
   InGroup<HLSLExtension>;
 def err_hlsl_unsupported_component : Error<"invalid component '%0' used; expected 'x', 'y', 'z', or 'w'">;
 def err_hlsl_packoffset_invalid_reg : Error<"invalid resource class specifier '%0' for packoffset, expected 'c'">;
+def err_hlsl_virtual_function
+    : Error<"virtual functions are unsupported in HLSL">;
+def err_hlsl_virtual_inheritance
+    : Error<"virtual inheritance is unsupported in HLSL">;
 
 } // end of Parser diagnostics