Merge branch 'llvm:main' into main

Author: santhoshe447

.clang-tidy

@@ -1,4 +1,16 @@
-Checks: '-*,clang-diagnostic-*,llvm-*,misc-*,-misc-const-correctness,-misc-unused-parameters,-misc-non-private-member-variables-in-classes,-misc-no-recursion,-misc-use-anonymous-namespace,readability-identifier-naming,-misc-include-cleaner'
+Checks: >
+  -*,
+  clang-diagnostic-*,
+  llvm-*,
+  misc-*,
+  -misc-const-correctness,
+  -misc-include-cleaner,
+  -misc-no-recursion,
+  -misc-non-private-member-variables-in-classes,
+  -misc-unused-parameters,
+  -misc-use-anonymous-namespace,
+  readability-identifier-naming
+
 CheckOptions:
   - key:             readability-identifier-naming.ClassCase
     value:           CamelCase

.github/new-prs-labeler.yml

@@ -784,18 +784,20 @@ backend:NVPTX:
 backend:MIPS:
   - '**/*mips*'
   - '**/*Mips*'
+  - '**/*mips*/**'
+  - '**/*Mips*/**'
 
 backend:RISC-V:
-  - clang/**/*riscv*
-  - clang/**/*RISCV*
-  - llvm/**/*riscv*
-  - llvm/**/*RISCV*
+  - '**/*riscv*'
+  - '**/*RISCV*'
+  - '**/*riscv*/**'
+  - '**/*RISCV*/**'
 
 backend:Xtensa:
-  - clang/**/*xtensa*
-  - clang/**/*Xtensa*
-  - llvm/**/*xtensa*
-  - llvm/**/*Xtensa*
+  - '**/*xtensa*'
+  - '**/*Xtensa*'
+  - '**/*xtensa*/**'
+  - '**/*Xtensa*/**'
 
 lld:coff:
   - lld/**/COFF/**

.github/workflows/build-ci-container-windows.yml

@@ -20,7 +20,7 @@ on:
 jobs:
   build-ci-container-windows:
     if: github.repository_owner == 'llvm'
-    runs-on: windows-2019
+    runs-on: windows-2022
     outputs:
       container-name: ${{ steps.vars.outputs.container-name }}
       container-name-tag: ${{ steps.vars.outputs.container-name-tag }}
@@ -34,7 +34,7 @@ jobs:
         id: vars
         run: |
           $tag = [int64](Get-Date -UFormat %s)
-          $container_name="ghcr.io/$env:GITHUB_REPOSITORY_OWNER/ci-windows-2019"
+          $container_name="ghcr.io/$env:GITHUB_REPOSITORY_OWNER/ci-windows-2022"
           echo "container-name=${container_name}" >> $env:GITHUB_OUTPUT
           echo "container-name-tag=${container_name}:${tag}" >> $env:GITHUB_OUTPUT
           echo "container-filename=ci-windows-${tag}.tar" >> $env:GITHUB_OUTPUT
@@ -58,7 +58,7 @@ jobs:
       - build-ci-container-windows
     permissions:
       packages: write
-    runs-on: windows-2019
+    runs-on: windows-2022
     env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:

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

@@ -1,6 +1,6 @@
 # Agent image for LLVM org cluster.
 # .net 4.8 is required by chocolately package manager.
-FROM mcr.microsoft.com/dotnet/framework/sdk:4.8-windowsservercore-ltsc2019
+FROM mcr.microsoft.com/dotnet/framework/sdk:4.8-windowsservercore-ltsc2022
 
 # Restore the default Windows shell for correct batch processing.
 SHELL ["cmd", "/S", "/C"]
@@ -39,11 +39,16 @@ RUN regsvr32 /S "C:\BuildTools\DIA SDK\bin\amd64\msdia140.dll" & \
 
 # install tools as described in https://llvm.org/docs/GettingStartedVS.html
 # and a few more that were not documented...
-RUN choco install -y ninja git sccache
 # Pin an older version of Python; the current Python 3.10 fails when
 # doing "pip install" for the other dependencies, as it fails to find libxml
 # while compiling some package.
-RUN choco install -y python3 --version 3.9.7
+# We version pin the other packages as well to ensure the container build is as
+# reproducible as possible to prevent issues when upgrading only part of the
+# container.
+RUN choco install -y ninja --version 1.13.1 && \
+    choco install -y git --version 2.50.1 && \
+    choco install -y sccache --version 0.10.0 && \
+    choco install -y python3 --version 3.9.7
 
 # Testing requires psutil
 RUN pip install psutil

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

@@ -2,7 +2,7 @@ FROM docker.io/library/ubuntu:24.04 as base
 ENV LLVM_SYSROOT=/opt/llvm
 
 FROM base as stage1-toolchain
-ENV LLVM_VERSION=20.1.4
+ENV LLVM_VERSION=20.1.8
 
 RUN apt-get update && \
     apt-get install -y \

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

@@ -36,8 +36,7 @@ concurrency:
 jobs:
   stage1:
     if: github.repository_owner == 'llvm'
-    runs-on: libcxx-self-hosted-linux
-    container: ghcr.io/llvm/libcxx-linux-builder:b060022103f551d8ca1dad84122ef73927c86512
+    runs-on: llvm-premerge-libcxx-runners
     continue-on-error: false
     strategy:
       fail-fast: false
@@ -74,8 +73,7 @@ jobs:
             **/crash_diagnostics/*
   stage2:
     if: github.repository_owner == 'llvm'
-    runs-on: libcxx-self-hosted-linux
-    container: ghcr.io/llvm/libcxx-linux-builder:2b57ebb50b6d418e70382e655feaa619b558e254
+    runs-on: llvm-premerge-libcxx-runners
     needs: [ stage1 ]
     continue-on-error: false
     strategy:
@@ -149,21 +147,20 @@ jobs:
           'generic-static',
           'bootstrapping-build'
         ]
-        machine: [ 'libcxx-self-hosted-linux' ]
+        machine: [ 'llvm-premerge-libcxx-runners' ]
         include:
         - config: 'generic-cxx26'
-          machine: libcxx-self-hosted-linux
+          machine: llvm-premerge-libcxx-runners
         - config: 'generic-asan'
-          machine: libcxx-self-hosted-linux
+          machine: llvm-premerge-libcxx-runners
         - config: 'generic-tsan'
-          machine: libcxx-self-hosted-linux
+          machine: llvm-premerge-libcxx-runners
         - config: 'generic-ubsan'
-          machine: libcxx-self-hosted-linux
+          machine: llvm-premerge-libcxx-runners
         # Use a larger machine for MSAN to avoid timeout and memory allocation issues.
         - config: 'generic-msan'
-          machine: libcxx-self-hosted-linux
+          machine: llvm-premerge-libcxx-runners
     runs-on: ${{ matrix.machine }}
-    container: ghcr.io/llvm/libcxx-linux-builder:2b57ebb50b6d418e70382e655feaa619b558e254
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: ${{ matrix.config }}

.github/workflows/libcxx-restart-preempted-jobs.yaml

@@ -55,7 +55,7 @@ jobs:
       - name: Install clang-format
         uses: aminya/setup-cpp@17c11551771948abc5752bbf3183482567c7caf0 # v1.1.1
         with:
-          clangformat: 20.1.5
+          clangformat: 20.1.8
 
       - name: Setup Python env
         uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0

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

@@ -63,6 +63,7 @@ jobs:
 
           ./.ci/monolithic-linux.sh "${projects_to_build}" "${project_check_targets}" "${runtimes_to_build}" "${runtimes_check_targets}" "${runtimes_check_targets_needs_reconfig}"
       - name: Upload Artifacts
+        if: '!cancelled()'
         uses: actions/upload-artifact@65c4c4a1ddee5b72f698fdd19549f0f0fb45cf08 # v4.6.0
         with:
           name: Premerge Artifacts (Linux)
@@ -113,6 +114,7 @@ jobs:
           call C:\\BuildTools\\Common7\\Tools\\VsDevCmd.bat -arch=amd64 -host_arch=amd64
           bash .ci/monolithic-windows.sh "${{ steps.vars.outputs.windows-projects }}" "${{ steps.vars.outputs.windows-check-targets }}"
       - name: Upload Artifacts
+        if: '!cancelled()'
         uses: actions/upload-artifact@65c4c4a1ddee5b72f698fdd19549f0f0fb45cf08 # v4.6.0
         with:
           name: Premerge Artifacts (Windows)

.github/workflows/premerge.yaml

@@ -430,6 +430,17 @@ class MCPlusBuilder {
     return Analysis->isIndirectBranch(Inst);
   }
 
+  /// Returns true if the instruction unconditionally transfers the control to
+  /// another program point, interrupting sequential code execution, e.g. by a
+  /// call, return, or unconditional jump. This explicitly leaves out
+  /// conditional branches as they may not be taken, but does allow transferring
+  /// the control to the next instruction (zero-displacement jump/call).
+  bool isUnconditionalControlTransfer(const MCInst &Inst) const {
+    const MCInstrDesc &Desc = Info->get(Inst.getOpcode());
+    // barrier captures returns and unconditional branches
+    return Desc.isBarrier() || Desc.isCall();
+  }
+
   /// Returns true if the instruction is memory indirect call or jump
   virtual bool isBranchOnMem(const MCInst &Inst) const {
     llvm_unreachable("not implemented");