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Convert ASSIGN_ADD $a, $b into $a = ADD $a, $b, if possible.

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Dmitry Stogov
2016-03-22 23:57:26 +03:00
parent 76d612129b
commit d8b75b0807
1 changed files with 25 additions and 0 deletions
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25
ext/opcache/Optimizer/dfa_pass.c
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@@ -431,6 +431,31 @@ void zend_dfa_optimize_op_array(zend_op_array *op_array, zend_optimizer_ctx *ctx
op_array->opcodes[op2].opcode = ZEND_PRE_DEC;
SET_UNUSED(op_array->opcodes[op2].op2);
} else if (ssa->ops[op2].op1_def == i
&& !RETURN_VALUE_USED(&op_array->opcodes[op2])
&& ssa->ops[op2].op1_use >= 0
&& !(ssa->var_info[ssa->ops[op2].op1_use].type & (MAY_BE_STRING|MAY_BE_ARRAY|MAY_BE_OBJECT|MAY_BE_RESOURCE|MAY_BE_REF))
&& (op_array->opcodes[op2].opcode == ZEND_ASSIGN_ADD
|| op_array->opcodes[op2].opcode == ZEND_ASSIGN_SUB
|| op_array->opcodes[op2].opcode == ZEND_ASSIGN_MUL
|| op_array->opcodes[op2].opcode == ZEND_ASSIGN_DIV
|| op_array->opcodes[op2].opcode == ZEND_ASSIGN_MOD
|| op_array->opcodes[op2].opcode == ZEND_ASSIGN_SL
|| op_array->opcodes[op2].opcode == ZEND_ASSIGN_SR
|| op_array->opcodes[op2].opcode == ZEND_ASSIGN_BW_OR
|| op_array->opcodes[op2].opcode == ZEND_ASSIGN_BW_AND
|| op_array->opcodes[op2].opcode == ZEND_ASSIGN_BW_XOR)
&& op_array->opcodes[op2].extended_value == 0) {
/* Reconstruct SSA */
ssa->ops[op2].result_def = ssa->ops[op2].op1_def;
ssa->ops[op2].op1_def = -1;
/* Update opcode */
op_array->opcodes[op2].opcode -= (ZEND_ASSIGN_ADD - ZEND_ADD);
op_array->opcodes[op2].result_type = op_array->opcodes[op2].op1_type;
op_array->opcodes[op2].result.var = op_array->opcodes[op2].op1.var;
}
}
if (remove_nops) {