Revert "[CMake][compiler-rt][AArch64] Avoid preprocessing LSE builtins separately"

Causing issues on Apple buildbots.
http://green.lab.llvm.org/green/job/clang-stage1-RA/17019/console

This reverts commit 33b740f8dc.
This reverts commit d9697c2e6b.

Differential Revision: https://reviews.llvm.org/D93199

compiler-rt/cmake/Modules/CompilerRTDarwinUtils.cmake

@@ -395,9 +395,7 @@ macro(darwin_add_builtin_libraries)
   set(CMAKE_CXX_FLAGS "")
   set(CMAKE_ASM_FLAGS "")
 
-  append_string_if(COMPILER_RT_HAS_ASM_LSE " -DHAS_ASM_LSE" CFLAGS)
-
-  set(PROFILE_SOURCES ../profile/InstrProfiling
+  set(PROFILE_SOURCES ../profile/InstrProfiling 
                       ../profile/InstrProfilingBuffer
                       ../profile/InstrProfilingPlatformDarwin
                       ../profile/InstrProfilingWriter

compiler-rt/lib/builtins/CMakeLists.txt

@@ -509,24 +509,31 @@ set(aarch64_SOURCES
 )
 
 # Generate outline atomics helpers from lse.S base
+set(CUSTOM_FLAGS ${CMAKE_C_FLAGS})
+if(NOT ANDROID)
+  append_list_if(COMPILER_RT_HAS_VISIBILITY_HIDDEN_FLAG -DVISIBILITY_HIDDEN CUSTOM_FLAGS)
+endif()
+append_list_if(COMPILER_RT_HAS_ASM_LSE -DHAS_ASM_LSE CUSTOM_FLAGS)
+string(REPLACE " " "\t" CUSTOM_FLAGS "${CUSTOM_FLAGS}")
 set(OA_HELPERS_DIR "${CMAKE_CURRENT_BINARY_DIR}/outline_atomic_helpers.dir")
-file(MAKE_DIRECTORY "${OA_HELPERS_DIR}")
+file(MAKE_DIRECTORY ${OA_HELPERS_DIR})
 
 foreach(pat cas swp ldadd ldclr ldeor ldset)
   foreach(size 1 2 4 8 16)
     foreach(model 1 2 3 4)
       if(pat STREQUAL "cas" OR NOT size STREQUAL "16")
-        set(helper_asm "${OA_HELPERS_DIR}/outline_atomic_${pat}${size}_${model}.S")
+        set(helper_asm ${OA_HELPERS_DIR}/outline_atomic_${pat}${size}_${model}.S)
         add_custom_command(
           OUTPUT ${helper_asm}
-          COMMAND ${CMAKE_COMMAND} -E create_symlink "${CMAKE_CURRENT_SOURCE_DIR}/aarch64/lse.S" "${helper_asm}"
+          COMMAND ${CMAKE_C_COMPILER} -E ${CUSTOM_FLAGS} -DL_${pat} -DSIZE=${size} -DMODEL=${model}
+                  ${CMAKE_CURRENT_SOURCE_DIR}/aarch64/lse.S -o ${helper_asm}
+          DEPENDS aarch64/lse.S assembly.h
         )
-        set_source_files_properties("${helper_asm}"
-          PROPERTIES
-          COMPILE_DEFINITIONS "L_${pat};SIZE=${size};MODEL=${model}"
-          INCLUDE_DIRECTORIES "${CMAKE_CURRENT_SOURCE_DIR}"
+        set_source_files_properties(${helper_asm} PROPERTIES GENERATED TRUE)
+        set(aarch64_SOURCES
+          ${aarch64_SOURCES}
+          ${helper_asm}
         )
-        list(APPEND aarch64_SOURCES "${helper_asm}")
       endif()
     endforeach(model)
   endforeach(size)
@@ -680,8 +687,6 @@ else ()
     append_list_if(COMPILER_RT_HAS_VISIBILITY_HIDDEN_FLAG VISIBILITY_HIDDEN BUILTIN_DEFS)
   endif()
 
-  append_list_if(COMPILER_RT_HAS_ASM_LSE HAS_ASM_LSE BUILTIN_DEFS)
-
   foreach (arch ${BUILTIN_SUPPORTED_ARCH})
     if (CAN_TARGET_${arch})
       # For ARM archs, exclude any VFP builtins if VFP is not supported

compiler-rt/lib/builtins/aarch64/lse.S

@@ -2,7 +2,7 @@
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-#include "assembly.h"
+#include "../assembly.h"
 
 // Out-of-line LSE atomics helpers. Ported from libgcc library.
 // N = {1, 2, 4, 8}