Fixed to avoid incorrect optimization with llvm15.0.0

Author: SakiTakamachi

ext/standard/math.c

@@ -187,14 +187,22 @@ PHPAPI double _php_math_round(double value, int places, int mode) {
 	 * e.g.
 	 * 0.285 * 10000000000 => 2850000000.0
 	 * floor(0.285 * 10000000000) => 2850000000
+	 *
+	 * Using `if` twice to prevent accidental optimization with llvm 15.0.0.
 	 */
 	cpu_round_mode = fegetround();
 	if (value >= 0.0) {
 		fesetround(FE_UPWARD);
-		tmp_value = floor(places > 0  ? value * exponent : value / exponent);
 	} else {
 		fesetround(FE_DOWNWARD);
-		tmp_value = ceil(places > 0  ? value * exponent : value / exponent);
+	}
+
+	adjusted_value = places > 0  ? value * exponent : value / exponent;
+
+	if (value >= 0.0) {
+		tmp_value = floor(adjusted_value);
+	} else {
+		tmp_value = ceil(adjusted_value);
 	}
 	fesetround(cpu_round_mode);