Merge branch 'arm-software' into automerge

Author: pratlucas

.github/CODEOWNERS

@@ -27,6 +27,7 @@
 /llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp @nikic
 /llvm/lib/Transforms/InstCombine/ @nikic
 
+/clang/include/clang/Sema/Sema.h @Endilll
 /clang/test/CXX/drs/ @Endilll
 /clang/www/cxx_dr_status.html @Endilll
 /clang/www/make_cxx_dr_status @Endilll
@@ -128,10 +129,10 @@
 /mlir/**/Transforms/SROA.* @moxinilian
 
 # BOLT
-/bolt/ @aaupov @maksfb @rafaelauler @ayermolo @dcci @yota9
+/bolt/ @aaupov @maksfb @rafaelauler @ayermolo @dcci
 
 # Bazel build system.
-/utils/bazel/ @rupprecht @keith @aaronmondal
+/utils/bazel/ @rupprecht @keith
 
 # InstallAPI and TextAPI
 /llvm/**/TextAPI/ @cyndyishida

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,26 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+**Summary**
+[A clear and concise description of what the bug is]
+
+**To Reproduce**
+1. [Steps to reproduce]
+
+**Expected behavior**
+[A clear and concise description of what you expected to happen]
+
+**Actual behavior**
+[A clear and concise description of what happens instead]
+
+**Environment**
+[Arm Toolchain variant and version, host OS: name, version, architecture]
+
+**[Additional context]**
+[Optional: Add any other context about the problem here or remove]

.github/ISSUE_TEMPLATE/downstream-change.md

@@ -0,0 +1,14 @@
+---
+name: Downstream Change
+about: Issue to track a Downstream Change
+title: "[Downstream Change] "
+labels: downstream-change
+assignees: ''
+
+---
+
+**What is the change**
+[Describe the change here, see CONTRIBUTING.md for details]
+
+**Why this change cannot be done upstream**
+[Provide the rationale]

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+**Problem or Opportunity**
+[A clear and concise description of what the problem or opportunity to improve is]
+
+**Requested Solution**
+[A clear and concise description of what you want to happen]
+
+**Alternatives Considered**
+[A clear and concise description of any alternative solutions or features you've considered]
+
+**Additional context**
+[Add any other context or screenshots about the feature request here]

.github/ISSUE_TEMPLATE/rfc.md

@@ -0,0 +1,38 @@
+---
+name: RFC
+about: Request for Comments (RFC)
+title: ''
+labels: RFC
+assignees: ''
+
+---
+
+**Summary**
+[A short summary/abstract of what this RFC is about so that readers can quickly judge if they are interested in going into the details or not]
+
+**Background**
+[Provide the context: relevant current status and/or history, references to more information]
+
+**Problem (or Opportunity or Goals)**
+[Clearly state the problem to solve or the opportunity (goals) to make use of, if this more an improvement/innovation.]
+
+**[Out of Scope]**
+[Optional: In cases where people could naturally have expectations/misconceptions about the solution, clearly state what this RFC is not about]
+
+**Proposal**
+[Explain and provide relevant details of the actual proposed design or actions]
+
+**[Benefits]**
+[Optional: Highlight why the proposal makes sense, especially if this is not a problem solving, but exploiting an opportunity]
+
+**[Implementation or Transition]**
+[Optional: Some solutions may need multiple steps to be implemented or require migration/transition period from the previous approach - outline the plan here]
+
+**[Risks]**
+[Optional: Consider risks and mitigations, if relevant]
+
+**Alternatives**
+[Explain what alternatives exist or were evaluated and rejected, why]
+
+**[Request for Comments]**
+[Optional: If it is not obvious, specifically list what questions/insights are asked from reviewers]

.github/dependabot.yml

@@ -7,12 +7,6 @@ ClangIR:
   - clang/tools/cir-*/**/*
   - clang/test/CIR/**/*
 
-clang:bytecode:
-  - clang/docs/ConstantInterpreter.rst
-  - clang/lib/AST/ByteCode/**/*
-  - clang/test/AST/ByteCode/**/*
-  - clang/unittests/AST/ByteCode/**/*
-
 clang:dataflow:
   - clang/include/clang/Analysis/FlowSensitive/**/*
   - clang/lib/Analysis/FlowSensitive/**/*
@@ -505,7 +499,6 @@ clang:static analyzer:
   - clang/tools/scan-build/**
   - clang/utils/analyzer/**
   - clang/docs/analyzer/**
-  - clang/test/Analysis/**
 
 pgo:
   - llvm/lib/Transforms/Instrumentation/CGProfile.cpp
@@ -643,7 +636,6 @@ hlsl:
   - clang/lib/Sema/HLSLExternalSemaSource.cpp
   - clang/lib/Sema/SemaHLSL.cpp
   - clang/lib/CodeGen/CGHLSLRuntime.*
-  - clang/lib/CodeGen/CGHLSLBuiltins.cpp
   - llvm/include/llvm/Frontend/HLSL/**
   - llvm/lib/Frontend/HLSL/**
 
@@ -666,20 +658,9 @@ backend:DirectX:
   - '**/*dxil*/**'
   - '**/*DXContainer*'
   - '**/*DXContainer*/**'
-  - clang/lib/Sema/SemaDirectX.cpp
-  - clang/include/clang/Sema/SemaDirectX.h
-  - clang/include/clang/Basic/BuiltinsDirectX.td
-  - clang/lib/CodeGen/TargetBuiltins/DirectX.cpp
-  - clang/test/CodeGenDirectX/**
-  - clang/test/SemaDirectX/**
 
 backend:SPIR-V:
   - clang/lib/Driver/ToolChains/SPIRV.*
-  - clang/lib/Sema/SemaSPIRV.cpp
-  - clang/include/clang/Sema/SemaSPIRV.h
-  - clang/include/clang/Basic/BuiltinsSPIRV.td
-  - clang/test/CodeGenSPIRV/**
-  - clang/test/SemaSPIRV/**
   - llvm/lib/Target/SPIRV/**
   - llvm/test/CodeGen/SPIRV/**
   - llvm/test/Frontend/HLSL/**
@@ -744,9 +725,6 @@ llvm:regalloc:
 lldb:
   - lldb/**
 
-lldb-dap:
-  - lldb/tools/lldb-dap/**
-
 backend:AMDGPU:
   - '**/*amdgpu*'
   - '**/*AMDGPU*'

.github/new-prs-labeler.yml

@@ -0,0 +1,86 @@
+# Copyright (c) 2025, Arm Limited and affiliates.
+# Part of the Arm Toolchain 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
+
+# This workflow runs all build scripts in parallel on Linux.
+# It is intended to be triggered as part of a **nightly build** to
+# validate all build configurations and test them automatically.
+#
+# Each build script is paired with a corresponding test script using
+# a matrix strategy. Each build+test pair runs as a separate job,
+# allowing for concurrency and clear traceability of failures.
+
+name: ATfE Nightly Build and Test
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '0 2 * * *'  # Every day at 02:00 UTC
+
+jobs:
+  build-and-test-toolchain:
+    name: Build ${{ matrix.build_script }} + Test ${{ matrix.test_script }} on ${{ matrix.runner }}
+    runs-on: ${{ matrix.runner }}
+    # Ensure the workflow only runs on the arm-toolchain repository and not on forks
+    if: github.repository == 'arm/arm-toolchain'
+
+    strategy:
+      fail-fast: false  # Prevents one job failure from cancelling all
+      matrix:
+        include:
+          - build_script: build.sh
+            test_script: test.sh
+            runner: ah-ubuntu_22_04-c7g_8x-100
+          - build_script: build_llvmlibc_overlay.sh
+            test_script: ''
+            runner: ah-ubuntu_22_04-c7g_8x-100
+          - build_script: build_newlib_nano_overlay.sh
+            test_script: ''
+            runner: ah-ubuntu_22_04-c7g_8x-100
+          - build_script: build_newlib_overlay.sh
+            test_script: ''
+            runner: ah-ubuntu_22_04-c7g_8x-100
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: bash ./arm-software/embedded/scripts/install_dependencies.sh
+
+      - name: Add ~/.local/bin to PATH
+        run: echo "$HOME/.local/bin" >> $GITHUB_PATH
+
+      - name: Apply llvm-project patches
+        run: |
+          python3 arm-software/embedded/cmake/patch_repo.py \
+            --method apply \
+            arm-software/embedded/patches/llvm-project
+
+      - name: Apply llvm-project-perf patches
+        run: |
+          python3 arm-software/embedded/cmake/patch_repo.py \
+            --method apply \
+            arm-software/embedded/patches/llvm-project-perf
+
+      - name: Build ${{ matrix.build_script }}
+        run: bash ./arm-software/embedded/scripts/${{ matrix.build_script }}
+
+      - name: Test ${{ matrix.test_script }}
+        if: matrix.test_script != ''
+        run: bash ./arm-software/embedded/scripts/${{ matrix.test_script }}
+
+      - name: Upload test results
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: test-results-${{ matrix.build_script }}
+          path: build/**/*.junit.xml
+
+      - name: Upload built packages
+        uses: actions/upload-artifact@v4
+        if: success()
+        with:
+          name: ATfE-packages-${{ matrix.build_script }}
+          path: build*/ATfE-*.tar.xz

.github/workflows/atfe_nightly_build_and_test.yml

@@ -0,0 +1,46 @@
+# This workflow executes the automerge python script to automatically merge
+# changes from the `main` branch of upstream LLVM into the `arm-software`
+# branch of the arm/arm-toolchain repository.
+name: Automerge
+on:
+  workflow_run:
+    workflows: [Sync from Upstream LLVM]
+    types:
+      - completed
+  workflow_dispatch:
+jobs:
+  Run-Automerge:
+    runs-on: ubuntu-24.04-arm
+    permissions:
+      pull-requests: write
+    if: github.repository == 'arm/arm-toolchain'
+    strategy:
+      matrix:
+        branches:
+          - from_branch: main
+            to_branch: arm-software
+    steps:
+      - name: Configure Access Token
+        uses: actions/create-github-app-token@v1
+        id: generate-token
+        with:
+          app-id: ${{ secrets.SYNC_APP_ID }}
+          private-key: ${{ secrets.SYNC_APP_PRIVATE_KEY }}
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ matrix.branches.to_branch }}
+          token: ${{ steps.generate-token.outputs.token }}
+      - name: Configure Git Identity
+        run: |
+          git config --local user.name "github-actions[bot]"
+          git config --local user.email "41898282+github-actions[bot]@users.noreply.github.com"
+      - name: Fetch Branches
+        run: |
+          git remote set-branches --add origin ${{ matrix.branches.from_branch }}
+          git fetch origin ${{ matrix.branches.from_branch }}:${{ matrix.branches.from_branch }}
+          git pull --unshallow --ff-only origin ${{ matrix.branches.to_branch }}
+      - name: Run automerge
+        run: python3 arm-software/ci/automerge.py --project-name ${{ github.repository }} --from-branch ${{ matrix.branches.from_branch }} --to-branch ${{ matrix.branches.to_branch }} --verbose
+        env:
+          GH_TOKEN: ${{ steps.generate-token.outputs.token }}