Revert "[compiler-rt][aarch64] Add SME ABI support routines." (#68875)

This reverts commit 2b05fa8. It caused build errors in compiler-rt.

Author: hnrklssn

compiler-rt/cmake/Modules/AddCompilerRT.cmake

@@ -312,10 +312,6 @@ function(add_compiler_rt_runtime name type)
       set(COMPONENT_OPTION COMPONENT ${libname})
     endif()
 
-    if(type STREQUAL "SHARED")
-      list(APPEND LIB_DEFS COMPILER_RT_SHARED_LIB)
-    endif()
-
     if(type STREQUAL "OBJECT")
       if(CMAKE_C_COMPILER_ID MATCHES Clang AND CMAKE_C_COMPILER_TARGET)
         list(APPEND extra_cflags_${libname} "--target=${CMAKE_C_COMPILER_TARGET}")

compiler-rt/cmake/builtin-config-ix.cmake

@@ -33,12 +33,6 @@ asm(\".arch armv8-a+lse\");
 asm(\"cas w0, w1, [x2]\");
 ")
 
-builtin_check_c_compiler_source(COMPILER_RT_HAS_ASM_SME
-"
-asm(\".arch armv9-a+sme\");
-asm(\"smstart\");
-")
-
 if(ANDROID)
   set(OS_NAME "Android")
 else()

compiler-rt/lib/builtins/CMakeLists.txt

@@ -551,8 +551,6 @@ set(aarch64_SOURCES
   ${GENERIC_SOURCES}
   cpu_model.c
   aarch64/fp_mode.c
-  aarch64/sme-abi.S
-  aarch64/sme-abi-init.c
 )
 
 # Generate outline atomics helpers from lse.S base
@@ -782,7 +780,6 @@ else ()
   endif()
 
   append_list_if(COMPILER_RT_HAS_ASM_LSE HAS_ASM_LSE BUILTIN_DEFS)
-  append_list_if(COMPILER_RT_HAS_ASM_SME HAS_ASM_SME BUILTIN_DEFS)
 
   foreach (arch ${BUILTIN_SUPPORTED_ARCH})
     if (CAN_TARGET_${arch})