diff --git a/compiler-rt/lib/builtins/aarch64/lse.S b/compiler-rt/lib/builtins/aarch64/lse.S
--- a/compiler-rt/lib/builtins/aarch64/lse.S
+++ b/compiler-rt/lib/builtins/aarch64/lse.S
@@ -113,7 +113,8 @@
 .endm
 
 #ifdef L_cas
-DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED(NAME(cas))
+DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED_START(NAME(cas))
+DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED_END(NAME(cas))
         JUMP_IF_NOT_LSE 8f
 #if SIZE < 16
 #ifdef HAS_ASM_LSE
@@ -166,7 +167,8 @@
 #else
 #define SWP .inst 0x38208020 + B + N
 #endif
-DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED(NAME(swp))
+DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED_START(NAME(swp))
+DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED_END(NAME(swp))
         JUMP_IF_NOT_LSE 8f
         SWP    // s(0), s(0), [x1]
         ret
@@ -209,7 +211,8 @@
 #define LDOP .inst 0x38200020 + OPN + B + N
 #endif
 
-DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED(NAME(LDNM))
+DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED_START(NAME(LDNM))
+DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED_END(NAME(LDNM))
         JUMP_IF_NOT_LSE 8f
         LDOP // s(0), s(0), [x1]
         ret
diff --git a/compiler-rt/lib/builtins/assembly.h b/compiler-rt/lib/builtins/assembly.h
--- a/compiler-rt/lib/builtins/assembly.h
+++ b/compiler-rt/lib/builtins/assembly.h
@@ -243,12 +243,16 @@
   DECLARE_FUNC_ENCODING                                                        \
   name:
 
-#define DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED(name)                     \
+// TODO(ilinpv) START & END parts will be merged when assembly parser bug
+// (kristina) in MasmParser::parseDirectiveCFIStartProc() is fixed.
+#define DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED_START(name)               \
   DEFINE_CODE_STATE                                                            \
   FUNC_ALIGN                                                                   \
   .globl name SEPARATOR                                                        \
   SYMBOL_IS_FUNC(name) SEPARATOR                                               \
-  DECLARE_SYMBOL_VISIBILITY(name) SEPARATOR                                    \
+  DECLARE_SYMBOL_VISIBILITY(name)
+
+#define DEFINE_COMPILERRT_OUTLINE_FUNCTION_UNMANGLED_END(name)                 \
   CFI_START SEPARATOR                                                          \
   DECLARE_FUNC_ENCODING                                                        \
   name: SEPARATOR BTI_C