[llvm] build_llvm_release.bat: Add --fast-build option (PR #219595)

[Tom Stellard via llvm-commits]

https://github.com/tstellar created https://github.com/llvm/llvm-project/pull/219595

This disables PGO and skips the tests for stage0.  With this option we can build the Windows release package on the github hosted Arm runners without hitting the 6 hour timeout.

>From f44e2d69fbb3d507a90ac17e297f6169eed27afc Mon Sep 17 00:00:00 2001
From: Tom Stellard <tstellar at redhat.com>
Date: Fri, 28 Aug 2026 15:54:36 -0700
Subject: [PATCH] build_llvm_release.bat: Add --fast-build option

This disables PGO and skips the tests for stage0.  With this option
we can build the Windows release package on the github hosted
Arm runners without hitting the 6 hour timeout.
---
 .github/workflows/release-binaries.yml    |  3 ++-
 llvm/utils/release/build_llvm_release.bat | 10 ++++++++--
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/release-binaries.yml b/.github/workflows/release-binaries.yml
index e758a0821c3ba..e95a6c5936137 100644
--- a/.github/workflows/release-binaries.yml
+++ b/.github/workflows/release-binaries.yml
@@ -297,10 +297,11 @@ jobs:
       env:
         INPUTS_RUNS_ON: ${{ inputs.runs-on }}
         LLVM_VERSION: ${{ needs.prepare.outputs.release-version }}
+        EXTRA_ARGS: ${{ case(needs.prepare.outputs.build-runs-on == 'windows-11-arm', '--fast-build', '--fast-build') }}
       run: |
         subst S: ${{ github.workspace }}
         cd S:\llvm\utils\release\
-        .\build_llvm_release.bat "--$($env:RUNNER_ARCH.ToLower())" --version $env:LLVM_VERSION --local-python --skip-checkout
+        .\build_llvm_release.bat "--$($env:RUNNER_ARCH.ToLower())" --version $env:LLVM_VERSION --local-python --skip-checkout $env:EXTRA_ARGS
         if ($env:INPUTS_RUNS_ON -eq "windows-11-arm") {
           $zstd = (Get-ChildItem -Recurse -Filter "zstd.exe" | Select-Object -First 1).fullName
           mv $zstd $env:GITHUB_WORKSPACE
diff --git a/llvm/utils/release/build_llvm_release.bat b/llvm/utils/release/build_llvm_release.bat
index db74c8bb0456d..b8a32ccde1050 100644
--- a/llvm/utils/release/build_llvm_release.bat
+++ b/llvm/utils/release/build_llvm_release.bat
@@ -10,7 +10,7 @@ goto begin
 echo Script for building the LLVM installer on Windows,
 echo used for the releases at https://github.com/llvm/llvm-project/releases
 echo.
-echo Usage: build_llvm_release.bat --version ^<version^> [--x86,--x64, --arm64] [--skip-checkout] [--local-python] [--force-msvc]
+echo Usage: build_llvm_release.bat --version ^<version^> [--x86,--x64, --arm64] [--skip-checkout] [--local-python] [--force-msvc] [--fast-build]
 echo.
 echo Options:
 echo --version: [required] version to build
@@ -40,6 +40,7 @@ set arm64=
 set skip-checkout=
 set local-python=
 set force-msvc=
+set fast-build=
 call :parse_args %*
 
 if "%help%" NEQ "" goto usage
@@ -325,6 +326,8 @@ if "%arch%"=="arm64" (
 cmake -GNinja %cmake_flags% ^
   -DLLVM_TARGETS_TO_BUILD=Native ^
   %llvm_src%\llvm || exit /b 1
+ninja clang lld llvm-lib llvm-windres runtimes || exit /b 1
+if "%fast-build%" neq "true" (
 ninja || exit /b 1
 ninja check-llvm || exit /b 1
 ninja check-clang || exit /b 1
@@ -332,6 +335,7 @@ ninja check-lld || exit /b 1
 if "%arch%"=="amd64" (
   ninja check-runtimes || exit /b 1
 )
+)
 cd..
 
 REM CMake expects the paths that specifies the compiler and linker to be
@@ -351,7 +355,9 @@ set cmake_flags=%all_cmake_flags:\=/%
 
 mkdir build_%arch%
 cd build_%arch%
-call :do_generate_profile || exit /b 1
+if "%fast-build%" neq "true" (
+  call :do_generate_profile || exit /b 1
+)
 cmake -GNinja %cmake_flags% ^
   -DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;lld;lldb;flang;mlir" ^
   -DLLVM_ENABLE_RUNTIMES="compiler-rt;openmp" ^