Merge branch 'main' into cleanup_20250831_SmallPtrSet_NumEntries2

Author: kazutakahirata

.github/new-prs-labeler.yml

@@ -90,9 +90,6 @@ LTO:
   - llvm/lib/Transforms/*/FunctionImport*
   - llvm/tools/gold/**
 
-mc:
-  - llvm/*/MC/**
-
 clang:driver:
   - clang/*/Driver/**
 
@@ -621,6 +618,12 @@ llvm:adt:
 llvm:support:
   - llvm/**/Support/**
 
+# Skip llvm/test/MC and llvm/unittests/MC, which includes target-specific directories.
+llvm:mc:
+  - llvm/include/llvm/MC/**
+  - llvm/lib/MC/**
+  - llvm/tools/llvm-mc/**
+
 llvm:transforms:
   - llvm/lib/Transforms/**
   - llvm/include/llvm/Transforms/**

.github/workflows/bazel-checks.yml

@@ -0,0 +1,32 @@
+name: Bazel Checks
+
+permissions:
+  contents: read
+
+on:
+  push:
+    paths:
+      - '.github/workflows/bazel-checks.yml'
+      - 'utils/bazel/**'
+    branches:
+      - main
+  pull_request:
+    paths:
+      - '.github/workflows/bazel-checks.yml'
+      - 'utils/bazel/**'
+
+jobs:
+  buildifier:
+    name: "Buildifier"
+    runs-on: ubuntu-24.04
+    if: github.repository == 'llvm/llvm-project'
+    steps:
+      - name: Fetch LLVM sources
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - name: Setup Buildifier
+        run: |
+          sudo curl -L https://github.com/bazelbuild/buildtools/releases/download/v8.2.1/buildifier-linux-amd64 -o /usr/bin/buildifier
+          sudo chmod +x /usr/bin/buildifier
+      - name: Run Buildifier
+        run: |
+          buildifier --mode=check $(find ./utils/bazel -name *BUILD*)

.github/workflows/containers/github-action-ci/Dockerfile

@@ -81,6 +81,8 @@ RUN curl -L 'https://github.com/mozilla/sccache/releases/download/v0.10.0/sccach
 
 ENV LLVM_SYSROOT=$LLVM_SYSROOT
 ENV PATH=${LLVM_SYSROOT}/bin:${PATH}
+ENV CC=clang
+ENV CXX=clang++
 
 # Create a new user to avoid test failures related to a lack of expected
 # permissions issues in some tests. Set the user id to 1001 as that is the

.gitignore

@@ -52,6 +52,11 @@ autoconf/autom4te.cache
 # CLion project configuration
 /.idea
 /cmake-build*
+# Coding assistants' stuff
+/CLAUDE.md
+/.claude/
+/GEMINI.md
+/.gemini/
 
 #==============================================================================#
 # Directories to ignore (do not add trailing '/'s, they skip symlinks).

bolt/include/bolt/Core/MCPlusBuilder.h

@@ -740,6 +740,10 @@ class MCPlusBuilder {
     return false;
   }
 
+  /// Return true if the hlt instruction under the x86, otherwise, default to
+  /// false.
+  virtual bool isX86HLT(const MCInst &Inst) const { return false; }
+
   /// Return the width, in bytes, of the memory access performed by \p Inst, if
   /// this is a pop instruction. Return zero otherwise.
   virtual int getPopSize(const MCInst &Inst) const {

bolt/lib/Core/MCPlusBuilder.cpp

@@ -132,8 +132,10 @@ bool MCPlusBuilder::equals(const MCSpecifierExpr &A, const MCSpecifierExpr &B,
 }
 
 bool MCPlusBuilder::isTerminator(const MCInst &Inst) const {
-  return Analysis->isTerminator(Inst) ||
-         (opts::TerminalTrap && Info->get(Inst.getOpcode()).isTrap());
+  return (opts::TerminalTrap && Info->get(Inst.getOpcode()).isTrap()) ||
+                 Analysis->isTerminator(Inst)
+             ? !isX86HLT(Inst)
+             : false;
 }
 
 void MCPlusBuilder::setTailCall(MCInst &Inst) const {

bolt/lib/Target/X86/X86MCPlusBuilder.cpp

@@ -223,6 +223,10 @@ class X86MCPlusBuilder : public MCPlusBuilder {
     return Inst.getOpcode() == X86::ENDBR32 || Inst.getOpcode() == X86::ENDBR64;
   }
 
+  bool isX86HLT(const MCInst &Inst) const override {
+    return Inst.getOpcode() == X86::HLT;
+  }
+
   int getPopSize(const MCInst &Inst) const override {
     switch (Inst.getOpcode()) {
     case X86::POP16r:

bolt/test/X86/cfg_build_hlt.s

@@ -0,0 +1,17 @@
+## Check CFG for halt instruction
+
+# RUN: %clang %cflags %s -static -o %t.exe -nostdlib
+# RUN: llvm-bolt %t.exe --print-cfg --print-only=main -o %t 2>&1 | FileCheck %s --check-prefix=CHECK-CFG
+# RUN: llvm-objdump -d %t --print-imm-hex | FileCheck %s --check-prefix=CHECK-BIN
+
+# CHECK-CFG: BB Count    : 1
+# CHECK-BIN: <main>:
+# CHECK-BIN-NEXT: f4                            hlt
+# CHECK-BIN-NEXT: c3                            retq
+
+.global main
+  .type main, %function
+main:
+        hlt
+        retq
+.size main, .-main

clang-tools-extra/docs/ReleaseNotes.rst

@@ -1,3 +1,6 @@
+.. If you want to modify sections/contents permanently, you should modify both
+   ReleaseNotes.rst and ReleaseNotesTemplate.txt.
+
 ====================================================
 Extra Clang Tools |release| |ReleaseNotesTitle|
 ====================================================

clang-tools-extra/docs/ReleaseNotesTemplate.txt

@@ -0,0 +1,122 @@
+.. If you want to modify sections/contents permanently, you should modify both
+   ReleaseNotes.rst and ReleaseNotesTemplate.txt.
+
+====================================================
+Extra Clang Tools |release| |ReleaseNotesTitle|
+====================================================
+
+.. contents::
+   :local:
+   :depth: 3
+
+Written by the `LLVM Team <https://llvm.org/>`_
+
+.. only:: PreRelease
+
+  .. warning::
+     These are in-progress notes for the upcoming Extra Clang Tools |version| release.
+     Release notes for previous releases can be found on
+     `the Download Page <https://releases.llvm.org/download.html>`_.
+
+Introduction
+============
+
+This document contains the release notes for the Extra Clang Tools, part of the
+Clang release |release|. Here we describe the status of the Extra Clang Tools in
+some detail, including major improvements from the previous release and new
+feature work. All LLVM releases may be downloaded from the `LLVM releases web
+site <https://llvm.org/releases/>`_.
+
+For more information about Clang or LLVM, including information about
+the latest release, please see the `Clang Web Site <https://clang.llvm.org>`_ or
+the `LLVM Web Site <https://llvm.org>`_.
+
+Note that if you are reading this file from a Git checkout or the
+main Clang web page, this document applies to the *next* release, not
+the current one. To see the release notes for a specific release, please
+see the `releases page <https://llvm.org/releases/>`_.
+
+What's New in Extra Clang Tools |release|?
+==========================================
+
+Some of the major new features and improvements to Extra Clang Tools are listed
+here. Generic improvements to Extra Clang Tools as a whole or to its underlying
+infrastructure are described first, followed by tool-specific sections.
+
+Major New Features
+------------------
+
+Improvements to clangd
+----------------------
+
+Inlay hints
+^^^^^^^^^^^
+
+Diagnostics
+^^^^^^^^^^^
+
+Semantic Highlighting
+^^^^^^^^^^^^^^^^^^^^^
+
+Compile flags
+^^^^^^^^^^^^^
+
+Hover
+^^^^^
+
+Code completion
+^^^^^^^^^^^^^^^
+
+Code actions
+^^^^^^^^^^^^
+
+Signature help
+^^^^^^^^^^^^^^
+
+Cross-references
+^^^^^^^^^^^^^^^^
+
+Objective-C
+^^^^^^^^^^^
+
+Miscellaneous
+^^^^^^^^^^^^^
+
+Improvements to clang-doc
+-------------------------
+
+Improvements to clang-query
+---------------------------
+
+Improvements to clang-tidy
+--------------------------
+
+New checks
+^^^^^^^^^^
+
+New check aliases
+^^^^^^^^^^^^^^^^^
+
+Changes in existing checks
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Removed checks
+^^^^^^^^^^^^^^
+
+Miscellaneous
+^^^^^^^^^^^^^
+
+Improvements to include-fixer
+-----------------------------
+
+Improvements to clang-include-fixer
+-----------------------------------
+
+Improvements to modularize
+--------------------------
+
+Improvements to pp-trace
+------------------------
+
+Clang-tidy Visual Studio plugin
+-------------------------------