diff --git a/Zend/zend.c b/Zend/zend.c
index bebf00a424d3..778c3ee9603c 100644
--- a/Zend/zend.c
+++ b/Zend/zend.c
@@ -632,7 +632,7 @@ static void function_copy_ctor(zval *zv) /* {{{ */
 	}
 	func = pemalloc(sizeof(zend_internal_function), 1);
 	Z_FUNC_P(zv) = func;
-	memcpy(func, old_func, sizeof(zend_internal_function));
+	ZEND_MEMCPY_INLINE(func, old_func, sizeof(zend_internal_function));
 	function_add_ref(func);
 	if ((old_func->common.fn_flags & (ZEND_ACC_HAS_RETURN_TYPE|ZEND_ACC_HAS_TYPE_HINTS))
 	 && old_func->common.arg_info) {
@@ -1298,7 +1298,7 @@ ZEND_API zval *zend_get_configuration_directive(zend_string *name) /* {{{ */
 
 #define SAVE_STACK(stack) do { \
 		if (CG(stack).top) { \
-			memcpy(&stack, &CG(stack), sizeof(zend_stack)); \
+			ZEND_MEMCPY_INLINE(&stack, &CG(stack), sizeof(zend_stack)); \
 			CG(stack).top = CG(stack).max = 0; \
 			CG(stack).elements = NULL; \
 		} else { \
@@ -1309,7 +1309,7 @@ ZEND_API zval *zend_get_configuration_directive(zend_string *name) /* {{{ */
 #define RESTORE_STACK(stack) do { \
 		if (stack.top) { \
 			zend_stack_destroy(&CG(stack)); \
-			memcpy(&CG(stack), &stack, sizeof(zend_stack)); \
+			ZEND_MEMCPY_INLINE(&CG(stack), &stack, sizeof(zend_stack)); \
 		} \
 	} while (0)
 
diff --git a/Zend/zend_API.c b/Zend/zend_API.c
index bfcbe2e5f3e1..c9da1256d5a9 100644
--- a/Zend/zend_API.c
+++ b/Zend/zend_API.c
@@ -1328,7 +1328,7 @@ ZEND_API HashTable *zend_separate_class_constants_table(zend_class_entry *class_
 		if (c->ce == class_type) {
 			if (Z_TYPE(c->value) == IS_CONSTANT_AST) {
 				new_c = zend_arena_alloc(&CG(arena), sizeof(zend_class_constant));
-				memcpy(new_c, c, sizeof(zend_class_constant));
+				ZEND_MEMCPY_INLINE(new_c, c, sizeof(zend_class_constant));
 				c = new_c;
 			}
 			Z_TRY_ADDREF(c->value);
@@ -2770,7 +2770,7 @@ ZEND_API zend_result zend_register_functions(zend_class_entry *scope, const zend
 		lowercase_name = zend_string_tolower_ex(internal_function->function_name, type == MODULE_PERSISTENT);
 		lowercase_name = zend_new_interned_string(lowercase_name);
 		reg_function = malloc(sizeof(zend_internal_function));
-		memcpy(reg_function, &function, sizeof(zend_internal_function));
+		ZEND_MEMCPY_INLINE(reg_function, &function, sizeof(zend_internal_function));
 		if (zend_hash_add_ptr(target_function_table, lowercase_name, reg_function) == NULL) {
 			unload=1;
 			free(reg_function);
diff --git a/Zend/zend_alloc.c b/Zend/zend_alloc.c
index 0ed2ee2a79ae..12d8b96bbd05 100644
--- a/Zend/zend_alloc.c
+++ b/Zend/zend_alloc.c
@@ -3008,7 +3008,7 @@ ZEND_API zend_mm_heap *zend_mm_startup_ex(const zend_mm_handlers *handlers, void
 	zend_mm_chunk *chunk;
 	zend_mm_heap *heap;
 
-	memcpy((zend_mm_handlers*)&tmp_storage.handlers, handlers, sizeof(zend_mm_handlers));
+	ZEND_MEMCPY_INLINE((zend_mm_handlers*)&tmp_storage.handlers, handlers, sizeof(zend_mm_handlers));
 	tmp_storage.data = data;
 	chunk = (zend_mm_chunk*)handlers->chunk_alloc(&tmp_storage, ZEND_MM_CHUNK_SIZE, ZEND_MM_CHUNK_SIZE);
 	if (UNEXPECTED(chunk == NULL)) {
@@ -3068,7 +3068,7 @@ ZEND_API zend_mm_heap *zend_mm_startup_ex(const zend_mm_handlers *handlers, void
 #endif
 		return NULL;
 	}
-	memcpy(storage, &tmp_storage, sizeof(zend_mm_storage));
+	ZEND_MEMCPY_INLINE(storage, &tmp_storage, sizeof(zend_mm_storage));
 	if (data) {
 		storage->data = (void*)(((char*)storage + sizeof(zend_mm_storage)));
 		memcpy(storage->data, data, data_size);
diff --git a/Zend/zend_attributes.c b/Zend/zend_attributes.c
index 6330887b2908..a1dfa6f4d60a 100644
--- a/Zend/zend_attributes.c
+++ b/Zend/zend_attributes.c
@@ -374,7 +374,7 @@ void zend_register_attribute_ce(void)
 	zend_ce_sensitive_parameter = register_class_SensitiveParameter();
 	attr = zend_internal_attribute_register(zend_ce_sensitive_parameter, ZEND_ATTRIBUTE_TARGET_PARAMETER);
 
-	memcpy(&attributes_object_handlers_sensitive_parameter_value, &std_object_handlers, sizeof(zend_object_handlers));
+	ZEND_MEMCPY_INLINE(&attributes_object_handlers_sensitive_parameter_value, &std_object_handlers, sizeof(zend_object_handlers));
 	attributes_object_handlers_sensitive_parameter_value.get_properties_for = attributes_sensitive_parameter_value_get_properties_for;
 
 	/* This is not an actual attribute, thus the zend_internal_attribute_register() call is missing. */
diff --git a/Zend/zend_closures.c b/Zend/zend_closures.c
index e141d0956dc9..42fc4a9cdf06 100644
--- a/Zend/zend_closures.c
+++ b/Zend/zend_closures.c
@@ -648,7 +648,7 @@ void zend_register_closure_ce(void) /* {{{ */
 	zend_ce_closure = register_class_Closure();
 	zend_ce_closure->create_object = zend_closure_new;
 
-	memcpy(&closure_handlers, &std_object_handlers, sizeof(zend_object_handlers));
+	ZEND_MEMCPY_INLINE(&closure_handlers, &std_object_handlers, sizeof(zend_object_handlers));
 	closure_handlers.free_obj = zend_closure_free_storage;
 	closure_handlers.get_constructor = zend_closure_get_constructor;
 	closure_handlers.get_method = zend_closure_get_method;
@@ -685,7 +685,7 @@ static void zend_create_closure_ex(zval *res, zend_function *func, zend_class_en
 	}
 
 	if (func->type == ZEND_USER_FUNCTION) {
-		memcpy(&closure->func, func, sizeof(zend_op_array));
+		ZEND_MEMCPY_INLINE(&closure->func, func, sizeof(zend_op_array));
 		closure->func.common.fn_flags |= ZEND_ACC_CLOSURE;
 		closure->func.common.fn_flags &= ~ZEND_ACC_IMMUTABLE;
 
@@ -739,7 +739,7 @@ static void zend_create_closure_ex(zval *res, zend_function *func, zend_class_en
 			(*closure->func.op_array.refcount)++;
 		}
 	} else {
-		memcpy(&closure->func, func, sizeof(zend_internal_function));
+		ZEND_MEMCPY_INLINE(&closure->func, func, sizeof(zend_internal_function));
 		closure->func.common.fn_flags |= ZEND_ACC_CLOSURE;
 		/* wrap internal function handler to avoid memory leak */
 		if (UNEXPECTED(closure->func.internal_function.handler == zend_closure_internal_handler)) {
diff --git a/Zend/zend_constants.c b/Zend/zend_constants.c
index 8ce832153a0b..49cd7b2191db 100644
--- a/Zend/zend_constants.c
+++ b/Zend/zend_constants.c
@@ -64,7 +64,7 @@ static void copy_zend_constant(zval *zv)
 
 	ZEND_ASSERT(ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT);
 	Z_PTR_P(zv) = pemalloc(sizeof(zend_constant), 1);
-	memcpy(Z_PTR_P(zv), c, sizeof(zend_constant));
+	ZEND_MEMCPY_INLINE(Z_PTR_P(zv), c, sizeof(zend_constant));
 
 	c = Z_PTR_P(zv);
 	c->name = zend_string_copy(c->name);
@@ -538,7 +538,7 @@ static void* zend_hash_add_constant(HashTable *ht, zend_string *key, zend_consta
 	void *ret;
 	zend_constant *copy = pemalloc(sizeof(zend_constant), ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT);
 
-	memcpy(copy, c, sizeof(zend_constant));
+	ZEND_MEMCPY_INLINE(copy, c, sizeof(zend_constant));
 	ret = zend_hash_add_ptr(ht, key, copy);
 	if (!ret) {
 		pefree(copy, ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT);
diff --git a/Zend/zend_enum.c b/Zend/zend_enum.c
index ab4e6e4e6f93..bb0f83fa8cbd 100644
--- a/Zend/zend_enum.c
+++ b/Zend/zend_enum.c
@@ -156,7 +156,7 @@ void zend_register_enum_ce(void)
 	zend_ce_backed_enum = register_class_BackedEnum(zend_ce_unit_enum);
 	zend_ce_backed_enum->interface_gets_implemented = zend_implement_backed_enum;
 
-	memcpy(&enum_handlers, &std_object_handlers, sizeof(zend_object_handlers));
+	ZEND_MEMCPY_INLINE(&enum_handlers, &std_object_handlers, sizeof(zend_object_handlers));
 	enum_handlers.clone_obj = NULL;
 	enum_handlers.compare = zend_objects_not_comparable;
 }
diff --git a/Zend/zend_exceptions.c b/Zend/zend_exceptions.c
index 3934a3cef071..882671bc84f2 100644
--- a/Zend/zend_exceptions.c
+++ b/Zend/zend_exceptions.c
@@ -744,7 +744,7 @@ void zend_register_default_exception(void) /* {{{ */
 	zend_ce_throwable = register_class_Throwable(zend_ce_stringable);
 	zend_ce_throwable->interface_gets_implemented = zend_implement_throwable;
 
-	memcpy(&default_exception_handlers, &std_object_handlers, sizeof(zend_object_handlers));
+	ZEND_MEMCPY_INLINE(&default_exception_handlers, &std_object_handlers, sizeof(zend_object_handlers));
 	default_exception_handlers.clone_obj = NULL;
 
 	zend_ce_exception = register_class_Exception(zend_ce_throwable);
diff --git a/Zend/zend_generators.c b/Zend/zend_generators.c
index 99c888ee09e9..d89267a4115c 100644
--- a/Zend/zend_generators.c
+++ b/Zend/zend_generators.c
@@ -1133,7 +1133,7 @@ void zend_register_generator_ce(void) /* {{{ */
 	/* get_iterator has to be assigned *after* implementing the interface */
 	zend_ce_generator->get_iterator = zend_generator_get_iterator;
 
-	memcpy(&zend_generator_handlers, &std_object_handlers, sizeof(zend_object_handlers));
+	ZEND_MEMCPY_INLINE(&zend_generator_handlers, &std_object_handlers, sizeof(zend_object_handlers));
 	zend_generator_handlers.free_obj = zend_generator_free_storage;
 	zend_generator_handlers.dtor_obj = zend_generator_dtor_storage;
 	zend_generator_handlers.get_gc = zend_generator_get_gc;
diff --git a/Zend/zend_inheritance.c b/Zend/zend_inheritance.c
index 3921ee35fe0d..1584f1ecde50 100644
--- a/Zend/zend_inheritance.c
+++ b/Zend/zend_inheritance.c
@@ -81,10 +81,10 @@ static zend_function *zend_duplicate_internal_function(zend_function *func, zend
 
 	if (UNEXPECTED(ce->type & ZEND_INTERNAL_CLASS)) {
 		new_function = pemalloc(sizeof(zend_internal_function), 1);
-		memcpy(new_function, func, sizeof(zend_internal_function));
+		ZEND_MEMCPY_INLINE(new_function, func, sizeof(zend_internal_function));
 	} else {
 		new_function = zend_arena_alloc(&CG(arena), sizeof(zend_internal_function));
-		memcpy(new_function, func, sizeof(zend_internal_function));
+		ZEND_MEMCPY_INLINE(new_function, func, sizeof(zend_internal_function));
 		new_function->common.fn_flags |= ZEND_ACC_ARENA_ALLOCATED;
 	}
 	if (EXPECTED(new_function->common.function_name)) {
@@ -1111,7 +1111,7 @@ static zend_always_inline inheritance_status do_inheritance_check_on_method_ex(
 				} else {
 					/* op_array wasn't duplicated yet */
 					zend_function *new_function = zend_arena_alloc(&CG(arena), sizeof(zend_op_array));
-					memcpy(new_function, child, sizeof(zend_op_array));
+					ZEND_MEMCPY_INLINE(new_function, child, sizeof(zend_op_array));
 					Z_PTR_P(child_zv) = child = new_function;
 				}
 			}
@@ -1352,13 +1352,13 @@ static void do_inherit_class_constant(zend_string *name, zend_class_constant *pa
 			ce->ce_flags |= ZEND_ACC_HAS_AST_CONSTANTS;
 			if (ce->parent->ce_flags & ZEND_ACC_IMMUTABLE) {
 				c = zend_arena_alloc(&CG(arena), sizeof(zend_class_constant));
-				memcpy(c, parent_const, sizeof(zend_class_constant));
+				ZEND_MEMCPY_INLINE(c, parent_const, sizeof(zend_class_constant));
 				parent_const = c;
 			}
 		}
 		if (ce->type & ZEND_INTERNAL_CLASS) {
 			c = pemalloc(sizeof(zend_class_constant), 1);
-			memcpy(c, parent_const, sizeof(zend_class_constant));
+			ZEND_MEMCPY_INLINE(c, parent_const, sizeof(zend_class_constant));
 			parent_const = c;
 		}
 		_zend_hash_append_ptr(&ce->constants_table, name, parent_const);
@@ -1638,14 +1638,14 @@ static void do_inherit_iface_constant(zend_string *name, zend_class_constant *c,
 			ce->ce_flags |= ZEND_ACC_HAS_AST_CONSTANTS;
 			if (iface->ce_flags & ZEND_ACC_IMMUTABLE) {
 				ct = zend_arena_alloc(&CG(arena), sizeof(zend_class_constant));
-				memcpy(ct, c, sizeof(zend_class_constant));
+				ZEND_MEMCPY_INLINE(ct, c, sizeof(zend_class_constant));
 				c = ct;
 				Z_CONSTANT_FLAGS(c->value) |= CONST_OWNED;
 			}
 		}
 		if (ce->type & ZEND_INTERNAL_CLASS) {
 			ct = pemalloc(sizeof(zend_class_constant), 1);
-			memcpy(ct, c, sizeof(zend_class_constant));
+			ZEND_MEMCPY_INLINE(ct, c, sizeof(zend_class_constant));
 			c = ct;
 		}
 		zend_hash_update_ptr(&ce->constants_table, name, c);
@@ -1837,11 +1837,11 @@ static void zend_add_trait_method(zend_class_entry *ce, zend_string *name, zend_
 
 	if (UNEXPECTED(fn->type == ZEND_INTERNAL_FUNCTION)) {
 		new_fn = zend_arena_alloc(&CG(arena), sizeof(zend_internal_function));
-		memcpy(new_fn, fn, sizeof(zend_internal_function));
+		ZEND_MEMCPY_INLINE(new_fn, fn, sizeof(zend_internal_function));
 		new_fn->common.fn_flags |= ZEND_ACC_ARENA_ALLOCATED;
 	} else {
 		new_fn = zend_arena_alloc(&CG(arena), sizeof(zend_op_array));
-		memcpy(new_fn, fn, sizeof(zend_op_array));
+		ZEND_MEMCPY_INLINE(new_fn, fn, sizeof(zend_op_array));
 		new_fn->op_array.fn_flags |= ZEND_ACC_TRAIT_CLONE;
 		new_fn->op_array.fn_flags &= ~ZEND_ACC_IMMUTABLE;
 	}
@@ -2425,14 +2425,14 @@ static void add_compatibility_obligation(
 	obligation->type = OBLIGATION_COMPATIBILITY;
 	/* Copy functions, because they may be stack-allocated in the case of traits. */
 	if (child_fn->common.type == ZEND_INTERNAL_FUNCTION) {
-		memcpy(&obligation->child_fn, child_fn, sizeof(zend_internal_function));
+		ZEND_MEMCPY_INLINE(&obligation->child_fn, child_fn, sizeof(zend_internal_function));
 	} else {
-		memcpy(&obligation->child_fn, child_fn, sizeof(zend_op_array));
+		ZEND_MEMCPY_INLINE(&obligation->child_fn, child_fn, sizeof(zend_op_array));
 	}
 	if (parent_fn->common.type == ZEND_INTERNAL_FUNCTION) {
-		memcpy(&obligation->parent_fn, parent_fn, sizeof(zend_internal_function));
+		ZEND_MEMCPY_INLINE(&obligation->parent_fn, parent_fn, sizeof(zend_internal_function));
 	} else {
-		memcpy(&obligation->parent_fn, parent_fn, sizeof(zend_op_array));
+		ZEND_MEMCPY_INLINE(&obligation->parent_fn, parent_fn, sizeof(zend_op_array));
 	}
 	obligation->child_scope = child_scope;
 	obligation->parent_scope = parent_scope;
@@ -2553,7 +2553,7 @@ static zend_class_entry *zend_lazy_class_load(zend_class_entry *pce)
 	Bucket *p, *end;
 
 	ce = zend_arena_alloc(&CG(arena), sizeof(zend_class_entry));
-	memcpy(ce, pce, sizeof(zend_class_entry));
+	ZEND_MEMCPY_INLINE(ce, pce, sizeof(zend_class_entry));
 	ce->ce_flags &= ~ZEND_ACC_IMMUTABLE;
 	ce->refcount = 1;
 	ce->inheritance_cache = NULL;
@@ -2592,7 +2592,7 @@ static zend_class_entry *zend_lazy_class_load(zend_class_entry *pce)
 			ZEND_ASSERT(op_array->prototype == NULL);
 			new_op_array = zend_arena_alloc(&CG(arena), sizeof(zend_op_array));
 			Z_PTR(p->val) = new_op_array;
-			memcpy(new_op_array, op_array, sizeof(zend_op_array));
+			ZEND_MEMCPY_INLINE(new_op_array, op_array, sizeof(zend_op_array));
 			new_op_array->fn_flags &= ~ZEND_ACC_IMMUTABLE;
 			new_op_array->scope = ce;
 			ZEND_MAP_PTR_INIT(new_op_array->run_time_cache, NULL);
@@ -2641,7 +2641,7 @@ static zend_class_entry *zend_lazy_class_load(zend_class_entry *pce)
 			ZEND_ASSERT(prop_info->ce == pce);
 			new_prop_info= zend_arena_alloc(&CG(arena), sizeof(zend_property_info));
 			Z_PTR(p->val) = new_prop_info;
-			memcpy(new_prop_info, prop_info, sizeof(zend_property_info));
+			ZEND_MEMCPY_INLINE(new_prop_info, prop_info, sizeof(zend_property_info));
 			new_prop_info->ce = ce;
 			if (ZEND_TYPE_HAS_LIST(new_prop_info->type)) {
 				zend_type_list *new_list;
@@ -2669,7 +2669,7 @@ static zend_class_entry *zend_lazy_class_load(zend_class_entry *pce)
 			ZEND_ASSERT(c->ce == pce);
 			new_c = zend_arena_alloc(&CG(arena), sizeof(zend_class_constant));
 			Z_PTR(p->val) = new_c;
-			memcpy(new_c, c, sizeof(zend_class_constant));
+			ZEND_MEMCPY_INLINE(new_c, c, sizeof(zend_class_constant));
 			new_c->ce = ce;
 		}
 	}
diff --git a/Zend/zend_ini.c b/Zend/zend_ini.c
index f4f17c7ba18e..6ec3f5a019e5 100644
--- a/Zend/zend_ini.c
+++ b/Zend/zend_ini.c
@@ -143,7 +143,7 @@ static void copy_ini_entry(zval *zv) /* {{{ */
 	zend_ini_entry *new_entry = pemalloc(sizeof(zend_ini_entry), 1);
 
 	Z_PTR_P(zv) = new_entry;
-	memcpy(new_entry, old_entry, sizeof(zend_ini_entry));
+	ZEND_MEMCPY_INLINE(new_entry, old_entry, sizeof(zend_ini_entry));
 	if (old_entry->name) {
 		new_entry->name = zend_string_dup(old_entry->name, 1);
 	}
diff --git a/Zend/zend_portability.h b/Zend/zend_portability.h
index 6ad9f1b1db2f..19cb7450631b 100644
--- a/Zend/zend_portability.h
+++ b/Zend/zend_portability.h
@@ -341,6 +341,12 @@ char *alloca();
 # define UNEXPECTED(condition) (condition)
 #endif
 
+#if PHP_HAVE_BUILTIN_MEMCPY_INLINE
+# define ZEND_MEMCPY_INLINE(a, b, s) __builtin_memcpy_inline(a, b, s)
+#else
+# define ZEND_MEMCPY_INLINE(a, b, s) memcpy(a, b, s)
+#endif
+
 #ifndef XtOffsetOf
 # define XtOffsetOf(s_type, field) offsetof(s_type, field)
 #endif
diff --git a/Zend/zend_signal.c b/Zend/zend_signal.c
index 68bc3de3ff25..f23b3b4c4947 100644
--- a/Zend/zend_signal.c
+++ b/Zend/zend_signal.c
@@ -319,7 +319,7 @@ void zend_signal_activate(void)
 {
 	size_t x;
 
-	memcpy(&SIGG(handlers), &global_orig_handlers, sizeof(global_orig_handlers));
+	ZEND_MEMCPY_INLINE(&SIGG(handlers), &global_orig_handlers, sizeof(global_orig_handlers));
 
 	if (SIGG(reset)) {
 		for (x = 0; x < sizeof(zend_sigs) / sizeof(*zend_sigs); x++) {
diff --git a/Zend/zend_string.h b/Zend/zend_string.h
index 1a1c0cd7a67b..b5546a2e4156 100644
--- a/Zend/zend_string.h
+++ b/Zend/zend_string.h
@@ -432,7 +432,7 @@ static zend_always_inline zend_ulong zend_inline_hash_func(const char *str, size
 		   time and extract each byte with a bit field extract instr. */
 		uint64_t chunk;
 
-		memcpy(&chunk, str, sizeof(chunk));
+		ZEND_MEMCPY_INLINE(&chunk, str, sizeof(chunk));
 		hash =
 			hash                        * 33 * 33 * 33 * 33 +
 			((chunk >> (8 * 0)) & 0xff) * 33 * 33 * 33 +
diff --git a/Zend/zend_weakrefs.c b/Zend/zend_weakrefs.c
index 9d530047f902..aa76ad566ed8 100644
--- a/Zend/zend_weakrefs.c
+++ b/Zend/zend_weakrefs.c
@@ -648,7 +648,7 @@ void zend_register_weakref_ce(void) /* {{{ */
 
 	zend_ce_weakref->create_object = zend_weakref_new;
 
-	memcpy(&zend_weakref_handlers, zend_get_std_object_handlers(), sizeof(zend_object_handlers));
+	ZEND_MEMCPY_INLINE(&zend_weakref_handlers, zend_get_std_object_handlers(), sizeof(zend_object_handlers));
 	zend_weakref_handlers.offset = XtOffsetOf(zend_weakref, std);
 
 	zend_weakref_handlers.free_obj = zend_weakref_free;
@@ -659,7 +659,7 @@ void zend_register_weakref_ce(void) /* {{{ */
 	zend_ce_weakmap->create_object = zend_weakmap_create_object;
 	zend_ce_weakmap->get_iterator = zend_weakmap_get_iterator;
 
-	memcpy(&zend_weakmap_handlers, zend_get_std_object_handlers(), sizeof(zend_object_handlers));
+	ZEND_MEMCPY_INLINE(&zend_weakmap_handlers, zend_get_std_object_handlers(), sizeof(zend_object_handlers));
 	zend_weakmap_handlers.offset = XtOffsetOf(zend_weakmap, std);
 	zend_weakmap_handlers.free_obj = zend_weakmap_free_obj;
 	zend_weakmap_handlers.read_dimension = zend_weakmap_read_dimension;
diff --git a/build/php.m4 b/build/php.m4
index fb28f462396f..5223f1e89a62 100644
--- a/build/php.m4
+++ b/build/php.m4
@@ -2733,6 +2733,26 @@ AC_DEFUN([PHP_CHECK_BUILTIN_CPU_SUPPORTS], [
    [$have_builtin_cpu_supports], [Whether the compiler supports __builtin_cpu_supports])
 ])
 
+dnl
+dnl PHP_CHECK_BUILTIN_MEMCPY_INLINE
+dnl
+AC_DEFUN([PHP_CHECK_BUILTIN_MEMCPY_INLINE], [
+  AC_MSG_CHECKING([for __builtin_memcpy_inline])
+
+  AC_LINK_IFELSE([AC_LANG_PROGRAM([], [[
+    int d, s = 5;
+    __builtin_memcpy_inline(&d,&s,sizeof(d));
+  ]])], [
+    have_builtin_memcpy_inline=1
+    AC_MSG_RESULT([yes])
+  ], [
+    have_builtin_memcpy_inline=0
+    AC_MSG_RESULT([no])
+  ])
+
+  AC_DEFINE_UNQUOTED([PHP_HAVE_BUILTIN_MEMCPY_INLINE], [$have_builtin_memcpy_inline], [Whether the compiler supports __builtin_memcpy_inline])
+])
+
 dnl
 dnl PHP_PATCH_CONFIG_HEADERS([FILE])
 dnl
diff --git a/configure.ac b/configure.ac
index 29dd3b0437a4..c5ef09c928e2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -507,6 +507,8 @@ dnl Check __builtin_cpu_init
 PHP_CHECK_BUILTIN_CPU_INIT
 dnl Check __builtin_cpu_supports
 PHP_CHECK_BUILTIN_CPU_SUPPORTS
+dnl Check __builtin_memcpy_inline
+PHP_CHECK_BUILTIN_MEMCPY_INLINE
 
 dnl Check for __alignof__ support in the compiler
 AC_CACHE_CHECK(whether the compiler supports __alignof__, ac_cv_alignof_exists,[