Use "lea" to add/sub register with constant

Author: dstogov

ext/opcache/jit/zend_jit_x86.dasc

@@ -3826,6 +3826,21 @@ static int zend_jit_math_long_long(dasm_State    **Dst,
 			is_power_of_two(Z_LVAL_P(Z_ZV(op2_addr))))) {
 		|	GET_ZVAL_LVAL result_reg, op1_addr
 		|	shr Ra(result_reg), floor_log2(Z_LVAL_P(Z_ZV(op2_addr)))
+	} else if (opcode == ZEND_ADD &&
+			!may_overflow &&
+			Z_MODE(op1_addr) == IS_REG &&
+			Z_MODE(op2_addr) == IS_CONST_ZVAL) {
+		|	lea Ra(result_reg), [Ra(Z_REG(op1_addr))+Z_LVAL_P(Z_ZV(op2_addr))]
+	} else if (opcode == ZEND_ADD &&
+			!may_overflow &&
+			Z_MODE(op2_addr) == IS_REG &&
+			Z_MODE(op1_addr) == IS_CONST_ZVAL) {
+		|	lea Ra(result_reg), [Ra(Z_REG(op2_addr))+Z_LVAL_P(Z_ZV(op1_addr))]
+	} else if (opcode == ZEND_SUB &&
+			!may_overflow &&
+			Z_MODE(op1_addr) == IS_REG &&
+			Z_MODE(op2_addr) == IS_CONST_ZVAL) {
+		|	lea Ra(result_reg), [Ra(Z_REG(op1_addr))-Z_LVAL_P(Z_ZV(op2_addr))]
 	} else {
 		|	GET_ZVAL_LVAL result_reg, op1_addr
 		if (same_ops && opcode != ZEND_DIV) {