[mono] Fix some asserts caused by #78182. (#78291)

Fixes #78290.

Author: vargaz

src/mono/mono/mini/simd-intrinsics.c

@@ -684,7 +684,8 @@ get_vector_t_elem_type (MonoType *vector_type)
 }
 
 static gboolean
-type_is_unsigned (MonoType *type) {
+type_is_unsigned (MonoType *type)
+{
 	MonoClass *klass = mono_class_from_mono_type_internal (type);
 	MonoType *etype = mono_class_get_context (klass)->class_inst->type_argv [0];
 	return type_enum_is_unsigned (etype->type);
@@ -705,7 +706,8 @@ type_enum_is_unsigned (MonoTypeEnum type)
 }
 
 static gboolean
-type_is_float (MonoType *type) {
+type_is_float (MonoType *type)
+{
 	MonoClass *klass = mono_class_from_mono_type_internal (type);
 	MonoType *etype = mono_class_get_context (klass)->class_inst->type_argv [0];
 	return type_enum_is_float (etype->type);
@@ -2145,12 +2147,14 @@ emit_sys_numerics_vector_t (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSig
 	klass = cmethod->klass;
 	type = m_class_get_byval_arg (klass);
 	etype = mono_class_get_context (klass)->class_inst->type_argv [0];
+
+	if (!MONO_TYPE_IS_VECTOR_PRIMITIVE (etype))
+		return NULL;
+
 	size = mono_class_value_size (mono_class_from_mono_type_internal (etype), NULL);
 	g_assert (size);
 	len = register_size / size;
 
-	if (!MONO_TYPE_IS_VECTOR_PRIMITIVE (etype))
-		return NULL;
 
 	if (cfg->verbose_level > 1) {
 		char *name = mono_method_full_name (cmethod, TRUE);
@@ -4193,13 +4197,14 @@ emit_vector256_t (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSignature *fs
 
 	klass = cmethod->klass;
 	etype = mono_class_get_context (klass)->class_inst->type_argv [0];
-	size = mono_class_value_size (mono_class_from_mono_type_internal (etype), NULL);
-	g_assert (size);
-	len = 32 / size;
 
 	if (!MONO_TYPE_IS_VECTOR_PRIMITIVE (etype))
 		return NULL;
 
+	size = mono_class_value_size (mono_class_from_mono_type_internal (etype), NULL);
+	g_assert (size);
+	len = 32 / size;
+
 	if (cfg->verbose_level > 1) {
 		char *name = mono_method_full_name (cmethod, TRUE);
 		printf ("  SIMD intrinsic %s\n", name);