Merge branch 'main' into main

Author: Felix Kellenbenz

.ci/generate-buildkite-pipeline-premerge

@@ -91,7 +91,7 @@ function add-dependencies() {
     echo "${project}"
     case ${project} in
     bolt)
-      for p in lld llvm; do
+      for p in clang lld llvm; do
         echo $p
       done
     ;;
@@ -108,7 +108,7 @@ function add-dependencies() {
     compiler-rt|libc|openmp)
       echo clang lld
     ;;
-    flang|lldb)
+    flang|lldb|libclc)
       for p in llvm clang; do
         echo $p
       done

.ci/monolithic-linux.sh

@@ -48,7 +48,6 @@ cmake -S "${MONOREPO_ROOT}"/llvm -B "${BUILD_DIR}" \
       -D LLVM_LIT_ARGS="-v --xunit-xml-output ${BUILD_DIR}/test-results.xml --timeout=1200 --time-tests" \
       -D LLVM_ENABLE_LLD=ON \
       -D CMAKE_CXX_FLAGS=-gmlt \
-      -D BOLT_CLANG_EXE=/usr/bin/clang \
       -D LLVM_CCACHE_BUILD=ON \
       -D MLIR_ENABLE_BINDINGS_PYTHON=ON
 

.github/CODEOWNERS

@@ -35,6 +35,10 @@
 clang/lib/AST/Interp/ @tbaederr
 clang/test/AST/Interp/ @tbaederr
 
+/clang/include/clang/CIR @lanza @bcardosolopes
+/clang/lib/CIR @lanza @bcardosolopes
+/clang/tools/cir-* @lanza @bcardosolopes
+
 /lldb/ @JDevlieghere
 
 # MLIR Interfaces.
@@ -113,7 +117,15 @@ clang/test/AST/Interp/ @tbaederr
 
 # MLIR NVVM Dialect in MLIR
 /mlir/**/LLVMIR/**/BasicPtxBuilderInterface* @grypp
-/mlir/**/NVVM*/ @grypp
+/mlir/**/NVVM* @grypp
+
+# MLIR Python Bindings
+/mlir/test/python/ @ftynse @makslevental @stellaraccident
+/mlir/python/ @ftynse @makslevental @stellaraccident
+
+# MLIR Mem2Reg/SROA
+/mlir/**/Transforms/Mem2Reg.* @moxinilian
+/mlir/**/Transforms/SROA.* @moxinilian
 
 # BOLT
 /bolt/ @aaupov @maksfb @rafaelauler @ayermolo @dcci

.github/new-prs-labeler.yml

@@ -1,3 +1,12 @@
+BOLT:
+  - bolt/**/*
+
+ClangIR:
+  - clang/include/clang/CIR/**/*
+  - clang/lib/CIR/**/*
+  - clang/tools/cir-*/**/*
+  - clang/test/CIR/**/*
+
 clang:dataflow:
   - clang/include/clang/Analysis/FlowSensitive/**/*
   - clang/lib/Analysis/FlowSensitive/**/*
@@ -461,6 +470,7 @@ backend:m68k:
 
 libc++:
   - libcxx/**
+  - .github/workflows/libcxx-*
 
 libc++abi:
   - libcxxabi/**
@@ -938,3 +948,6 @@ openmp:libomptarget:
 
 bazel:
   - utils/bazel/**
+
+offload:
+  - offload/**

.github/workflows/libcxx-build-and-test.yaml

@@ -38,11 +38,11 @@ env:
   # LLVM POST-BRANCH bump version
   # LLVM POST-BRANCH add compiler test for ToT - 1, e.g. "Clang 17"
   # LLVM RELEASE bump remove compiler ToT - 3, e.g. "Clang 15"
-  LLVM_HEAD_VERSION: "18"   # Used compiler, update POST-BRANCH.
-  LLVM_PREVIOUS_VERSION: "17"
-  LLVM_OLDEST_VERSION: "16"
+  LLVM_HEAD_VERSION: "19"   # Used compiler, update POST-BRANCH.
+  LLVM_PREVIOUS_VERSION: "18"
+  LLVM_OLDEST_VERSION: "17"
   GCC_STABLE_VERSION: "13"
-  LLVM_SYMBOLIZER_PATH: "/usr/bin/llvm-symbolizer-18"
+  LLVM_SYMBOLIZER_PATH: "/usr/bin/llvm-symbolizer-19"
   CLANG_CRASH_DIAGNOSTICS_DIR: "crash_diagnostics"
 
 
@@ -59,22 +59,19 @@ jobs:
           'generic-cxx26',
           'generic-modules'
         ]
-        cc: [  'clang-18' ]
-        cxx: [ 'clang++-18' ]
-        clang_tidy: [ 'ON' ]
+        cc: [  'clang-19' ]
+        cxx: [ 'clang++-19' ]
         include:
           - config: 'generic-gcc'
             cc: 'gcc-13'
             cxx: 'g++-13'
-            clang_tidy: 'OFF'
     steps:
       - uses: actions/checkout@v4
       - name: ${{ matrix.config }}.${{ matrix.cxx }}
         run: libcxx/utils/ci/run-buildbot ${{ matrix.config }}
         env:
           CC: ${{ matrix.cc }}
           CXX: ${{ matrix.cxx }}
-          ENABLE_CLANG_TIDY: ${{ matrix.clang_tidy }}
       - uses: actions/upload-artifact@26f96dfa697d77e81fd5907df203aa23a56210a8 # v4.3.0
         if: always()
         with:
@@ -100,30 +97,25 @@ jobs:
           'generic-cxx20',
           'generic-cxx23'
         ]
-        cc: [ 'clang-18' ]
-        cxx: [ 'clang++-18' ]
-        clang_tidy: [ 'ON' ]
+        cc: [ 'clang-19' ]
+        cxx: [ 'clang++-19' ]
         include:
           - config: 'generic-gcc-cxx11'
             cc: 'gcc-13'
             cxx: 'g++-13'
-            clang_tidy: 'OFF'
-          - config: 'generic-cxx23'
-            cc: 'clang-16'
-            cxx: 'clang++-16'
-            clang_tidy: 'OFF'
           - config: 'generic-cxx23'
             cc: 'clang-17'
             cxx: 'clang++-17'
-            clang_tidy: 'OFF'
+          - config: 'generic-cxx26'
+            cc: 'clang-18'
+            cxx: 'clang++-18'
     steps:
       - uses: actions/checkout@v4
       - name: ${{ matrix.config }}
         run: libcxx/utils/ci/run-buildbot ${{ matrix.config }}
         env:
           CC: ${{ matrix.cc }}
           CXX: ${{ matrix.cxx }}
-          ENABLE_CLANG_TIDY: ${{ matrix.clang_tidy }}
       - uses: actions/upload-artifact@26f96dfa697d77e81fd5907df203aa23a56210a8 # v4.3.0
         if: always()  # Upload artifacts even if the build or test suite fails
         with:
@@ -186,9 +178,8 @@ jobs:
       - name: ${{ matrix.config }}
         run: libcxx/utils/ci/run-buildbot ${{ matrix.config }}
         env:
-          CC: clang-18
-          CXX: clang++-18
-          ENABLE_CLANG_TIDY: "OFF"
+          CC: clang-19
+          CXX: clang++-19
       - uses: actions/upload-artifact@26f96dfa697d77e81fd5907df203aa23a56210a8 # v4.3.0
         if: always()
         with:

.github/workflows/pr-code-format.yml

@@ -1,4 +1,8 @@
 name: "Check code formatting"
+
+permissions:
+  contents: read
+
 on:
   pull_request:
     branches:

.github/workflows/release-lit.yml

@@ -58,7 +58,7 @@ jobs:
           cd llvm/utils/lit
           # Remove 'dev' suffix from lit version.
           sed -i 's/ + "dev"//g' lit/__init__.py
-          python3 setup.py sdist
+          python3 setup.py sdist bdist_wheel
 
       - name: Upload lit to test.pypi.org
         uses: pypa/gh-action-pypi-publish@release/v1

bolt/docs/BAT.md

@@ -81,9 +81,10 @@ Hot indices are delta encoded, implicitly starting at zero.
 | `FuncHash` | 8b | Function hash for input function | Hot |
 | `NumBlocks` | ULEB128 | Number of basic blocks in the original function | Hot |
 | `NumSecEntryPoints` | ULEB128 | Number of secondary entry points in the original function | Hot |
+| `ColdInputSkew` | ULEB128 | Skew to apply to all input offsets | Cold |
 | `NumEntries` | ULEB128 | Number of address translation entries for a function | Both |
-| `EqualElems` | ULEB128 | Number of equal offsets in the beginning of a function | Hot |
-| `BranchEntries` | Bitmask, `alignTo(EqualElems, 8)` bits | If `EqualElems` is non-zero, bitmask denoting entries with `BRANCHENTRY` bit | Hot |
+| `EqualElems` | ULEB128 | Number of equal offsets in the beginning of a function | Both |
+| `BranchEntries` | Bitmask, `alignTo(EqualElems, 8)` bits | If `EqualElems` is non-zero, bitmask denoting entries with `BRANCHENTRY` bit | Both |
 
 Function header is followed by *Address Translation Table* with `NumEntries`
 total entries, and *Secondary Entry Points* table with `NumSecEntryPoints`
@@ -99,8 +100,8 @@ entry is encoded. Input offsets implicitly start at zero.
 | `BBHash` | Optional, 8b | Basic block hash in input binary | BB |
 | `BBIdx`  | Optional, Delta, ULEB128 | Basic block index in input binary | BB |
 
-For hot fragments, the table omits the first `EqualElems` input offsets
-where the input offset equals output offset.
+The table omits the first `EqualElems` input offsets where the input offset
+equals output offset.
 
 `BRANCHENTRY` bit denotes whether a given offset pair is a control flow source
 (branch or call instruction). If not set, it signifies a control flow target

bolt/include/bolt/Core/BinaryContext.h

@@ -20,6 +20,7 @@
 #include "bolt/Core/JumpTable.h"
 #include "bolt/Core/MCPlusBuilder.h"
 #include "bolt/RuntimeLibs/RuntimeLibrary.h"
+#include "llvm/ADT/AddressRanges.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/iterator.h"
@@ -726,6 +727,9 @@ class BinaryContext {
   uint64_t OldTextSectionOffset{0};
   uint64_t OldTextSectionSize{0};
 
+  /// Area in the input binary reserved for BOLT.
+  AddressRange BOLTReserved;
+
   /// Address of the code/function that is executed before any other code in
   /// the binary.
   std::optional<uint64_t> StartFunctionAddress;

bolt/include/bolt/Core/BinaryData.h

@@ -107,7 +107,6 @@ class BinaryData {
   std::vector<MCSymbol *> &getSymbols() { return Symbols; }
 
   bool hasName(StringRef Name) const;
-  bool hasNameRegex(StringRef Name) const;
   bool nameStartsWith(StringRef Prefix) const;
 
   bool hasSymbol(const MCSymbol *Symbol) const {