Microsoft KB Archive/216747

= FIX: Incorrect Code Generated With /Og and /G6 =

Article ID: 216747

Article Last Modified on 5/6/2001

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APPLIES TO


 * Microsoft Visual C++ 6.0 Professional Edition

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This article was previously published under Q216747



SYMPTOMS
Incorrect code may be generated with the /Og and /G6 compiler optimizations.



CAUSE
The compiler incorrectly moves an .inc file, .add file, .sub file, or .lea file across an instruction that references memory.



STATUS
Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.

This bug was corrected in Visual Studio 6.0 Service Pack 3. For more information about Visual Studio service packs, please see the following articles in the Microsoft Knowledge Base:

194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why

194295 HOWTO: Tell That Visual Studio 6.0 Service Packs Are Installed



MORE INFORMATION
The following code illustrates one way the compiler can handle moving an instruction: inc eax mov [eax + 2*ebx + 3] The compiler needs to update the displacement to swap the instructions. For example: mov [eax + 2*ebx + (3 + 1)] inc eax

Keywords: kbbug kbfix kbvs600sp3fix KB216747

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