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Remove dead code for ADD_STRING/ADD_CHAR optimization

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These opcodes don't exist anymore. The modern equivalent would be
the ROPE_* opcodes. However the code would have to be different
anyway.
This commit is contained in:
Nikita Popov 2018-06-11 15:26:19 +02:00
parent 3b07c6cf87
commit e4e334effb
1 changed files with 0 additions and 74 deletions
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74
ext/opcache/Optimizer/pass1_5.c
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@ -22,7 +22,6 @@
/* pass 1
* - substitute persistent constants (true, false, null, etc)
* - perform compile-time evaluation of constant binary and unary operations
* - optimize series of ADD_STRING and/or ADD_CHAR
* - convert CAST(IS_BOOL,x) into BOOL(x)
* - pre-evaluate constant function calls
*/
@ -129,79 +128,6 @@ void zend_optimizer_pass1(zend_op_array *op_array, zend_optimizer_ctx *ctx)
}
break;
#if 0
case ZEND_ADD_STRING:
case ZEND_ADD_CHAR:
{
zend_op *next_op = opline + 1;
int requires_conversion = (opline->opcode == ZEND_ADD_CHAR? 1 : 0);
size_t final_length = 0;
zend_string *str;
char *ptr;
zend_op *last_op;
/* There is always a ZEND_RETURN at the end
if (next_op>=end) {
break;
}
*/
while (next_op->opcode == ZEND_ADD_STRING || next_op->opcode == ZEND_ADD_CHAR) {
if (opline->result.var != next_op->result.var) {
break;
}
if (next_op->opcode == ZEND_ADD_CHAR) {
final_length += 1;
} else { /* ZEND_ADD_STRING */
final_length += Z_STRLEN(ZEND_OP2_LITERAL(next_op));
}
next_op++;
}
if (final_length == 0) {
break;
}
last_op = next_op;
final_length += (requires_conversion? 1 : Z_STRLEN(ZEND_OP2_LITERAL(opline)));
str = zend_string_alloc(final_length, 0);
str->len = final_length;
ptr = str->val;
ptr[final_length] = '\0';
if (requires_conversion) { /* ZEND_ADD_CHAR */
char chval = (char)Z_LVAL(ZEND_OP2_LITERAL(opline));
ZVAL_NEW_STR(&ZEND_OP2_LITERAL(opline), str);
ptr[0] = chval;
opline->opcode = ZEND_ADD_STRING;
ptr++;
} else { /* ZEND_ADD_STRING */
memcpy(ptr, Z_STRVAL(ZEND_OP2_LITERAL(opline)), Z_STRLEN(ZEND_OP2_LITERAL(opline)));
ptr += Z_STRLEN(ZEND_OP2_LITERAL(opline));
zend_string_release_ex(Z_STR(ZEND_OP2_LITERAL(opline)), 0);
ZVAL_NEW_STR(&ZEND_OP2_LITERAL(opline), str);
}
next_op = opline + 1;
while (next_op < last_op) {
if (next_op->opcode == ZEND_ADD_STRING) {
memcpy(ptr, Z_STRVAL(ZEND_OP2_LITERAL(next_op)), Z_STRLEN(ZEND_OP2_LITERAL(next_op)));
ptr += Z_STRLEN(ZEND_OP2_LITERAL(next_op));
literal_dtor(&ZEND_OP2_LITERAL(next_op));
} else { /* ZEND_ADD_CHAR */
*ptr = (char)Z_LVAL(ZEND_OP2_LITERAL(next_op));
ptr++;
}
MAKE_NOP(next_op);
next_op++;
}
if (!((ZEND_OPTIMIZER_PASS_5|ZEND_OPTIMIZER_PASS_10) & OPTIMIZATION_LEVEL)) {
/* NOP removal is disabled => insert JMP over NOPs */
if (last_op-opline >= 3) { /* If we have more than 2 NOPS then JMP over them */
(opline + 1)->opcode = ZEND_JMP;
(opline + 1)->op1.opline_num = last_op - op_array->opcodes; /* that's OK even for ZE2, since opline_num's are resolved in pass 2 later */
}
}
}
break;
#endif
case ZEND_FETCH_CONSTANT:
if (opline->op2_type == IS_CONST &&
Z_TYPE(ZEND_OP2_LITERAL(opline)) == IS_STRING &&