JIT x86: Fixed NaN handling

Author: dstogov

ext/opcache/jit/zend_jit_x86.dasc

@@ -8617,8 +8617,9 @@ static int zend_jit_bool_jmpznz(dasm_State **Dst, const zend_op *opline, uint32_
 					|	SET_ZVAL_TYPE_INFO res_addr, IS_FALSE
 				} else {
 					|	SET_ZVAL_TYPE_INFO res_addr, IS_FALSE
-					|	jp &exit_addr
+					|	jp >1
 					|	je &exit_addr
+					|1:
 					|	SET_ZVAL_TYPE_INFO res_addr, IS_TRUE
 				}
 			} else if (false_label != (uint32_t)-1) { // JMPZ_EX
@@ -8657,8 +8658,9 @@ static int zend_jit_bool_jmpznz(dasm_State **Dst, const zend_op *opline, uint32_
 					|	jne &exit_addr
 					|1:
 				} else {
-					|	jp &exit_addr
+					|	jp >1
 					|	je &exit_addr
+					|1:
 				}
 			} else {
 				ZEND_ASSERT(true_label != (uint32_t)-1 || false_label != (uint32_t)-1);

ext/opcache/tests/jit/nan_001.phpt

@@ -0,0 +1,20 @@
+--TEST--
+NaN handling: 001
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.file_update_protection=0
+opcache.jit_buffer_size=1M
+opcache.protect_memory=1
+--FILE--
+<?php
+$b = NAN;
+for ($i = 0; $i < 3; $i++) {
+    if ($b) { echo "nan is true\n"; }
+    else { echo "nan is false\n"; }
+}	
+?>
+--EXPECT--
+nan is true
+nan is true
+nan is true