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Use iteration instead of recursion

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This commit is contained in:
Dmitry Stogov
2018-05-08 01:22:39 +03:00
parent 858d545ce6
commit 1e00b767a4
1 changed files with 15 additions and 6 deletions
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21
Zend/zend_ast.c
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@@ -754,7 +754,9 @@ ZEND_API zend_ast_ref * ZEND_FASTCALL zend_ast_copy(zend_ast *ast)
return ref;
}
ZEND_API void ZEND_FASTCALL zend_ast_destroy(zend_ast *ast) {
ZEND_API void ZEND_FASTCALL zend_ast_destroy(zend_ast *ast)
{
tail_call:
if (!ast) {
return;
}
@@ -762,17 +764,23 @@ ZEND_API void ZEND_FASTCALL zend_ast_destroy(zend_ast *ast) {
if (EXPECTED(ast->kind >= ZEND_AST_VAR)) {
uint32_t i, children = zend_ast_get_num_children(ast);
for (i = 0; i < children; i++) {
for (i = 1; i < children; i++) {
zend_ast_destroy(ast->child[i]);
}
ast = ast->child[0];
goto tail_call;
} else if (EXPECTED(ast->kind == ZEND_AST_ZVAL)) {
zval_ptr_dtor_nogc(zend_ast_get_zval(ast));
} else if (EXPECTED(zend_ast_is_list(ast))) {
zend_ast_list *list = zend_ast_get_list(ast);
uint32_t i;
if (list->children) {
uint32_t i;
for (i = 0; i < list->children; i++) {
zend_ast_destroy(list->child[i]);
for (i = 1; i < list->children; i++) {
zend_ast_destroy(list->child[i]);
}
ast = list->child[0];
goto tail_call;
}
} else if (EXPECTED(ast->kind == ZEND_AST_CONSTANT)) {
zend_string_release(zend_ast_get_constant_name(ast));
@@ -788,7 +796,8 @@ ZEND_API void ZEND_FASTCALL zend_ast_destroy(zend_ast *ast) {
zend_ast_destroy(decl->child[0]);
zend_ast_destroy(decl->child[1]);
zend_ast_destroy(decl->child[2]);
zend_ast_destroy(decl->child[3]);
ast = decl->child[3];
goto tail_call;
}
}