DOCUMENT:Q167347  07-MAY-2001  [visualc]
TITLE   :FIX: /Og Causes C1001, main.c, line 379 for Recursive Call
PRODUCT :Microsoft C Compiler
PROD/VER:winnt:5.0
OPER/SYS:
KEYWORDS:kbcode kbtool kbCompiler kbVC500bug kbVC600 kbVS97sp3fix

======================================================================
-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft Visual C++, 32-bit Enterprise Edition, version 5.0 
 - Microsoft Visual C++, 32-bit Professional Edition, version 5.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

When you compile a file, such as the following sample, with global optimization
enabled, the following error occurs:

   Text1.cpp(9) : fatal error C1001: INTERNAL COMPILER ERROR
   (compiler file 'E:\utc\src\\P2\main.c', line 379) Please choose the Technical
   Support command on the Visual C++ Help menu, or open the Technical Support
   help file for more information

RESOLUTION
==========

Remove the global optimizations for the source file or use the optimize pragma
to remove the optimization for the function which is causing the error.

NOTE 1: If you are optimizing to minimize size (/O1) or maximize speed (/O2) then
global optimization (/Og) is enabled as these options consist of several
optimizations which includes global optimization.

NOTE 2: The default compiler options /GZ (Catch Release-Build Errors in Debug
Build) and /ZI(Program Database for "Edit and Continue") are incompatible with
/Og option.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article. This bug has been fixed in Visual Studio 97 Service
Pack 3.

For more information, please see the following article in the Microsoft Knowledge
Base:

   Q170365 INFO: Visual Studio 97 Service Packs - What, Where, and Why

MORE INFORMATION
================

Sample Code
-----------

   /* Command Line Options: /Og
   */ 

   #include <d3drm.h>
   class A {
   public:
     void Recursive(D3DVECTOR p1, D3DVECTOR p2, D3DVECTOR q1,
                 D3DVECTOR q2, D3DVECTOR& ret);
   };

   void A::Recursive(D3DVECTOR p1, D3DVECTOR p2, D3DVECTOR q1,
                 D3DVECTOR q2, D3DVECTOR& ret)
   {
   Recursive(q1, q2, p1, p2, ret);
   }

======================================================================
Keywords          : kbcode kbtool kbCompiler kbVC500bug kbVC600 kbVS97sp3fix 
Technology        : kbVCsearch kbAudDeveloper kbVC500 kbVC32bitSearch kbVC500Search
Version           : winnt:5.0
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND.  MICROSOFT DISCLAIMS
ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  IN NO
EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.  SOME STATES DO NOT ALLOW THE EXCLUSION
OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
SO THE FOREGOING LIMITATION MAY NOT APPLY.

Copyright Microsoft Corporation 2001.