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Port switch

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This commit is contained in:
Nikita Popov 2014-07-11 15:31:47 +02:00
parent f12c1482a3
commit dde9faee2e
3 changed files with 104 additions and 12 deletions
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3
Zend/zend_ast.h
View File

@ -84,6 +84,9 @@ enum _zend_ast_kind {
ZEND_AST_REF,
ZEND_AST_IF,
ZEND_AST_IF_ELEM,
ZEND_AST_SWITCH,
ZEND_AST_SWITCH_LIST,
ZEND_AST_SWITCH_CASE,
};
typedef unsigned short zend_ast_kind;

86
Zend/zend_compile.c
View File

@ -7316,6 +7316,89 @@ void zend_compile_if(zend_ast *ast TSRMLS_DC) {
efree(jmp_opnums);
}
void zend_compile_switch(zend_ast *ast TSRMLS_DC) {
zend_ast *expr_ast = ast->child[0];
zend_ast *cases_ast = ast->child[1];
zend_uint i;
zend_bool has_default_case = 0;
zend_switch_entry switch_entry;
znode expr_node, case_node;
zend_op *opline;
zend_uint *jmpnz_opnums = safe_emalloc(sizeof(zend_uint), cases_ast->children, 0);
zend_uint opnum_default_jmp;
zend_compile_expr(&expr_node, expr_ast TSRMLS_CC);
switch_entry.cond = expr_node;
switch_entry.default_case = -1;
switch_entry.control_var = -1;
zend_stack_push(&CG(switch_cond_stack), (void *) &switch_entry);
do_begin_loop(TSRMLS_C);
case_node.op_type = IS_TMP_VAR;
case_node.u.op.var = get_temporary_variable(CG(active_op_array));
for (i = 0; i < cases_ast->children; ++i) {
zend_ast *case_ast = cases_ast->child[i];
zend_ast *cond_ast = case_ast->child[0];
znode cond_node;
if (!cond_ast) {
has_default_case = 1;
continue;
}
zend_compile_expr(&cond_node, cond_ast TSRMLS_CC);
opline = emit_op(NULL, ZEND_CASE, &expr_node, &cond_node TSRMLS_CC);
SET_NODE(opline->result, &case_node);
if (opline->op1_type == IS_CONST) {
zval_copy_ctor(&CONSTANT(opline->op1.constant));
}
jmpnz_opnums[i] = get_next_op_number(CG(active_op_array));
emit_op(NULL, ZEND_JMPNZ, &case_node, NULL TSRMLS_CC);
}
opnum_default_jmp = get_next_op_number(CG(active_op_array));
emit_op(NULL, ZEND_JMP, NULL, NULL TSRMLS_CC);
for (i = 0; i < cases_ast->children; ++i) {
zend_ast *case_ast = cases_ast->child[i];
zend_ast *cond_ast = case_ast->child[0];
zend_ast *stmt_ast = case_ast->child[1];
if (cond_ast) {
opline = &CG(active_op_array)->opcodes[jmpnz_opnums[i]];
opline->op2.opline_num = get_next_op_number(CG(active_op_array));
} else {
opline = &CG(active_op_array)->opcodes[opnum_default_jmp];
opline->op1.opline_num = get_next_op_number(CG(active_op_array));
}
zend_compile_stmt(stmt_ast TSRMLS_CC);
}
if (!has_default_case) {
opline = &CG(active_op_array)->opcodes[opnum_default_jmp];
opline->op1.opline_num = get_next_op_number(CG(active_op_array));
}
do_end_loop(get_next_op_number(CG(active_op_array)), 1 TSRMLS_CC);
if (expr_node.op_type == IS_VAR || expr_node.op_type == IS_TMP_VAR) {
emit_op(NULL, expr_node.op_type == IS_TMP_VAR ? ZEND_FREE : ZEND_SWITCH_FREE,
&expr_node, NULL TSRMLS_CC);
} else if (expr_node.op_type == IS_CONST) {
zval_dtor(&expr_node.u.constant);
}
zend_stack_del_top(&CG(switch_cond_stack));
}
void zend_compile_stmt_list(zend_ast *ast TSRMLS_DC) {
zend_uint i;
for (i = 0; i < ast->children; ++i) {
@ -8116,6 +8199,9 @@ void zend_compile_stmt(zend_ast *ast TSRMLS_DC) {
case ZEND_AST_IF:
zend_compile_if(ast TSRMLS_CC);
break;
case ZEND_AST_SWITCH:
zend_compile_switch(ast TSRMLS_CC);
break;
default:
{
znode result;

27
Zend/zend_language_parser.y
View File

@ -334,7 +334,9 @@ unticked_statement:
{ $$.u.ast = zend_ast_create_binary(ZEND_AST_DO_WHILE, $2.u.ast, $4.u.ast); }
| T_FOR '(' for_expr ';' for_expr ';' for_expr ')' for_statement
{ $$.u.ast = zend_ast_create(4, ZEND_AST_FOR, $3.u.ast, $5.u.ast, $7.u.ast, $9.u.ast); }
| T_SWITCH parenthesis_expr { AC($2); zend_do_switch_cond(&$2 TSRMLS_CC); } switch_case_list { zend_do_switch_end(&$4 TSRMLS_CC); AN($$); }
| T_SWITCH parenthesis_expr switch_case_list
{ $$.u.ast = zend_ast_create_binary(ZEND_AST_SWITCH, $2.u.ast, $3.u.ast); }
/*| T_SWITCH parenthesis_expr { AC($2); zend_do_switch_cond(&$2 TSRMLS_CC); } switch_case_list { zend_do_switch_end(&$4 TSRMLS_CC); AN($$); }*/
| T_BREAK ';' { $$.u.ast = zend_ast_create_unary(ZEND_BRK, NULL); }
| T_BREAK expr ';' { $$.u.ast = zend_ast_create_unary(ZEND_BRK, $2.u.ast); }
| T_CONTINUE ';' { $$.u.ast = zend_ast_create_unary(ZEND_CONT, NULL); }
@ -356,10 +358,6 @@ unticked_statement:
foreach_statement
{ $$.u.ast = zend_ast_create(4, ZEND_AST_FOREACH,
$3.u.ast, $7.u.ast, $5.u.ast, $9.u.ast); }
/*| T_FOREACH '(' expr_without_variable T_AS
{ AC($3); zend_do_foreach_begin(&$1, &$2, &$3, &$4, 0 TSRMLS_CC); }
foreach_variable foreach_optional_arg ')' { zend_do_foreach_cont(&$1, &$2, &$4, &$6, &$7 TSRMLS_CC); }
foreach_statement { zend_do_foreach_end(&$1, &$4 TSRMLS_CC); AN($$); }*/
| T_DECLARE { $1.u.op.opline_num = get_next_op_number(CG(active_op_array)); zend_do_declare_begin(TSRMLS_C); } '(' declare_list ')' declare_statement { zend_do_declare_end(&$1 TSRMLS_CC); AN($$); }
| ';' /* empty statement */ { AN($$); }
| T_TRY { zend_do_try(&$1 TSRMLS_CC); } '{' inner_statement_list '}' { AS($4); }
@ -507,17 +505,22 @@ declare_list:
switch_case_list:
'{' case_list '}' { $$ = $2; }
| '{' ';' case_list '}' { $$ = $3; }
| ':' case_list T_ENDSWITCH ';' { $$ = $2; }
| ':' ';' case_list T_ENDSWITCH ';' { $$ = $3; }
'{' case_list '}' { $$.u.ast = $2.u.ast; }
| '{' ';' case_list '}' { $$.u.ast = $3.u.ast; }
| ':' case_list T_ENDSWITCH ';' { $$.u.ast = $2.u.ast; }
| ':' ';' case_list T_ENDSWITCH ';' { $$.u.ast = $3.u.ast; }
;
case_list:
/* empty */ { $$.op_type = IS_UNUSED; }
| case_list T_CASE expr case_separator { AC($3); zend_do_extended_info(TSRMLS_C); zend_do_case_before_statement(&$1, &$2, &$3 TSRMLS_CC); } inner_statement_list { AS($6); zend_do_case_after_statement(&$$, &$2 TSRMLS_CC); $$.op_type = IS_CONST; }
| case_list T_DEFAULT case_separator { zend_do_extended_info(TSRMLS_C); zend_do_default_before_statement(&$1, &$2 TSRMLS_CC); } inner_statement_list { AS($5); zend_do_case_after_statement(&$$, &$2 TSRMLS_CC); $$.op_type = IS_CONST; }
/* empty */ { $$.u.ast = zend_ast_create_dynamic(ZEND_AST_SWITCH_LIST); }
| case_list T_CASE expr case_separator inner_statement_list
{ $$.u.ast = zend_ast_dynamic_add($1.u.ast,
zend_ast_create_binary(ZEND_AST_SWITCH_CASE, $3.u.ast, $5.u.ast)); }
| case_list T_DEFAULT case_separator inner_statement_list
{ $$.u.ast = zend_ast_dynamic_add($1.u.ast,
zend_ast_create_binary(ZEND_AST_SWITCH_CASE, NULL, $4.u.ast)); }
/*| case_list T_CASE expr case_separator { AC($3); zend_do_extended_info(TSRMLS_C); zend_do_case_before_statement(&$1, &$2, &$3 TSRMLS_CC); } inner_statement_list { AS($6); zend_do_case_after_statement(&$$, &$2 TSRMLS_CC); $$.op_type = IS_CONST; }*/
;