diff --git a/clang/cmake/caches/Fuchsia-stage2.cmake b/clang/cmake/caches/Fuchsia-stage2.cmake --- a/clang/cmake/caches/Fuchsia-stage2.cmake +++ b/clang/cmake/caches/Fuchsia-stage2.cmake @@ -41,7 +41,6 @@ set(CLANG_ENABLE_STATIC_ANALYZER ON CACHE BOOL "") set(CLANG_PLUGIN_SUPPORT OFF CACHE BOOL "") -set(ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER ON CACHE BOOL "") set(ENABLE_LINKER_BUILD_ID ON CACHE BOOL "") set(ENABLE_X86_RELAX_RELOCATIONS ON CACHE BOOL "") diff --git a/clang/cmake/caches/Fuchsia.cmake b/clang/cmake/caches/Fuchsia.cmake --- a/clang/cmake/caches/Fuchsia.cmake +++ b/clang/cmake/caches/Fuchsia.cmake @@ -32,7 +32,6 @@ set(CLANG_ENABLE_STATIC_ANALYZER ON CACHE BOOL "") set(CLANG_PLUGIN_SUPPORT OFF CACHE BOOL "") -set(ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER ON CACHE BOOL "") set(ENABLE_LINKER_BUILD_ID ON CACHE BOOL "") set(ENABLE_X86_RELAX_RELOCATIONS ON CACHE BOOL "") diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt --- a/llvm/CMakeLists.txt +++ b/llvm/CMakeLists.txt @@ -706,8 +706,13 @@ endif() option(LLVM_ENABLE_PLUGINS "Enable plugin support" ${LLVM_ENABLE_PLUGINS_default}) -set(ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER TRUE CACHE BOOL +set(LLVM_ENABLE_NEW_PASS_MANAGER TRUE CACHE BOOL "Enable the new pass manager by default.") +if(NOT LLVM_ENABLE_NEW_PASS_MANAGER) + message(WARNING "Using the legacy pass manager for the optimization pipeline" + " is deprecated. The functionality will degrade over time and" + " be removed in a future release.") +endif() include(HandleLLVMOptions) @@ -846,10 +851,6 @@ set_property(GLOBAL APPEND PROPERTY LLVM_EXPORTS tf_xla_runtime) endif() -# Keep the legacy CMake flag ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER for -# compatibility. -set(LLVM_ENABLE_NEW_PASS_MANAGER ${ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER}) - # Configure the three LLVM configuration header files. configure_file( ${LLVM_MAIN_INCLUDE_DIR}/llvm/Config/config.h.cmake diff --git a/llvm/docs/NewPassManager.rst b/llvm/docs/NewPassManager.rst --- a/llvm/docs/NewPassManager.rst +++ b/llvm/docs/NewPassManager.rst @@ -449,7 +449,7 @@ For the optimization pipeline, the new PM is the default PM. The legacy PM is available for the optimization pipeline either by setting the CMake flag -``-DENABLE_EXPERIMENTAL_NEW_PASS_MANAGER=OFF`` when building LLVM, or by +``-DLLVM_ENABLE_NEW_PASS_MANAGER=OFF`` when building LLVM, or by various compiler/linker flags, e.g. ``-flegacy-pass-manager`` for ``clang``. There will be efforts to deprecate and remove the legacy PM for the