Update zend_vm_gen.php with zend_vm_opcode.c/h changes

The generated files were modified directly, resulting in mysterious
build failures depending on exact build order.

Author: nikic

Zend/zend_vm_gen.php

@@ -2374,7 +2374,8 @@ function gen_vm_opcodes_header(
     $str .= "\n";
     $str .= "BEGIN_EXTERN_C()\n\n";
     $str .= "ZEND_API const char* ZEND_FASTCALL zend_get_opcode_name(zend_uchar opcode);\n";
-    $str .= "ZEND_API uint32_t ZEND_FASTCALL zend_get_opcode_flags(zend_uchar opcode);\n\n";
+    $str .= "ZEND_API uint32_t ZEND_FASTCALL zend_get_opcode_flags(zend_uchar opcode);\n";
+    $str .= "ZEND_API zend_uchar zend_get_opcode_id(const char *name, size_t length);\n\n";
     $str .= "END_EXTERN_C()\n\n";
 
     $code_len = strlen((string) $max_opcode);
@@ -2672,6 +2673,16 @@ function gen_vm($def, $skel) {
     fputs($f, "\treturn zend_vm_opcodes_flags[opcode];\n");
     fputs($f, "}\n");
 
+    fputs($f, "ZEND_API zend_uchar zend_get_opcode_id(const char *name, size_t length) {\n");
+    fputs($f, "\tzend_uchar opcode;\n");
+    fputs($f, "\tfor (opcode = 0; opcode < (sizeof(zend_vm_opcodes_names) / sizeof(zend_vm_opcodes_names[0])) - 1; opcode++) {\n");
+    fputs($f, "\t\tif (strncmp(zend_vm_opcodes_names[opcode], name, length) == 0) {\n");
+    fputs($f, "\t\t\treturn opcode;\n");
+    fputs($f, "\t\t}\n");
+    fputs($f, "\t}\n");
+    fputs($f, "\treturn ZEND_VM_LAST_OPCODE + 1;\n");
+    fputs($f, "}\n");
+
     fclose($f);
     echo "zend_vm_opcodes.c generated successfully.\n";