Revert "[AArch64][compiler-rt] Add memcpy, memset, memmove, memchr bu…

…iltins. (#77496)"

This reverts commit 3ab8d2a.

This change is causing issues running lit tests on many bots including:
- https://lab.llvm.org/buildbot/#/builders/197/builds/12119
- https://lab.llvm.org/buildbot/#/builders/184/builds/9792
- https://lab.llvm.org/buildbot/#/builders/93/builds/18455
- https://lab.llvm.org/buildbot/#/builders/231/builds/19858
- https://lab.llvm.org/buildbot/#/builders/121/builds/38426
- https://lab.llvm.org/buildbot/#/builders/230/builds/23990
- https://lab.llvm.org/buildbot/#/builders/57/builds/32391
- https://lab.llvm.org/buildbot/#/builders/247/builds/13502
- https://lab.llvm.org/buildbot/#/builders/275/builds/3601
- https://lab.llvm.org/buildbot/#/builders/269/builds/4211
- https://lab.llvm.org/buildbot/#/builders/18/builds/14161
- https://lab.llvm.org/buildbot/#/builders/19/builds/23893
- https://lab.llvm.org/buildbot/#/builders/37/builds/30295
- https://lab.llvm.org/buildbot/#/builders/77/builds/33979

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

@@ -35,12 +35,10 @@ asm(\".arch armv8-a+lse\");
 asm(\"cas w0, w1, [x2]\");
 ")
 
-builtin_check_c_compiler_source(COMPILER_RT_HAS_AARCH64_SME
+builtin_check_c_compiler_source(COMPILER_RT_HAS_ASM_SME
 "
-void foo(void)  __arm_streaming_compatible {
-  asm(\".arch armv9-a+sme\");
-  asm(\"smstart\");
-}
+asm(\".arch armv9-a+sme\");
+asm(\"smstart\");
 ")
 
 if(ANDROID)

compiler-rt/lib/builtins/CMakeLists.txt

@@ -560,10 +560,9 @@ set(aarch64_SOURCES
   aarch64/fp_mode.c
 )
 
-if(COMPILER_RT_HAS_AARCH64_SME AND COMPILER_RT_HAS_FNO_BUILTIN_FLAG AND (COMPILER_RT_HAS_AUXV OR COMPILER_RT_BAREMETAL_BUILD))
-  list(APPEND aarch64_SOURCES aarch64/sme-abi.S aarch64/sme-abi-init.c aarch64/sme-libc-routines.c)
+if(COMPILER_RT_HAS_ASM_SME AND (COMPILER_RT_HAS_AUXV OR COMPILER_RT_BAREMETAL_BUILD))
+  list(APPEND aarch64_SOURCES aarch64/sme-abi.S aarch64/sme-abi-init.c)
   message(STATUS "AArch64 SME ABI routines enabled")
-  set_source_files_properties(aarch64/sme-libc-routines.c PROPERTIES COMPILE_FLAGS "-fno-builtin")
 else()
   message(STATUS "AArch64 SME ABI routines disabled")
 endif()

compiler-rt/test/lit.common.cfg.py

@@ -454,9 +454,6 @@ def get_ios_commands_dir():
 if config.has_lld:
     config.available_features.add("lld-available")
 
-if config.aarch64_sme:
-    config.available_features.add("aarch64-sme-available")
-
 if config.use_lld:
     config.available_features.add("lld")
 

compiler-rt/test/lit.common.configured.in

@@ -50,7 +50,6 @@ set_default("gwp_asan", @COMPILER_RT_HAS_GWP_ASAN_PYBOOL@)
 set_default("expensive_checks", @LLVM_ENABLE_EXPENSIVE_CHECKS_PYBOOL@)
 set_default("test_standalone_build_libs", @COMPILER_RT_TEST_STANDALONE_BUILD_LIBS_PYBOOL@)
 set_default("has_compiler_rt_libatomic", @COMPILER_RT_BUILD_STANDALONE_LIBATOMIC_PYBOOL@)
-set_default("aarch64_sme", @COMPILER_RT_HAS_AARCH64_SME@)
 # True iff the test suite supports ignoring the test compiler's runtime library path
 # and using `config.compiler_rt_libdir` instead. This only matters when the runtime
 # library paths differ.

compiler-rt/unittests/lit.common.unit.configured.in

@@ -7,7 +7,6 @@ config.llvm_obj_root = "@LLVM_BINARY_DIR@"
 config.llvm_tools_dir = lit_config.substitute("@LLVM_TOOLS_DIR@")
 config.compiler_rt_src_root = "@COMPILER_RT_SOURCE_DIR@"
 config.compiler_rt_libdir = lit_config.substitute("@COMPILER_RT_RESOLVED_LIBRARY_OUTPUT_DIR@")
-config.aarch64_sme = "@COMPILER_RT_HAS_AARCH64_SME@"
 config.enable_per_target_runtime_dir = @LLVM_ENABLE_PER_TARGET_RUNTIME_DIR_PYBOOL@
 config.llvm_build_mode = lit_config.substitute("@LLVM_BUILD_MODE@")
 config.host_arch = "@HOST_ARCH@"