Q66169: Internal Compiler Error: ‘@(#)regMD.c:1.100’, Line 3837

Article: Q66169
Product(s): See article
Version(s): 6.00   | 6.00
Operating System(s): MS-DOS | OS/2
Keyword(s): ENDUSER | buglist6.00 fixlist6.00a | mspl13_c
Last Modified: 24-OCT-1990

When the code below is compiled from the command line with

   cl filename.c

it will produce the following error:

   fatal error C1001: Internal Compiler Error
   (compiler file '@(#)regMD.c:1.100', line 3837)
   Contact Microsoft Product Support Services

Workaround
----------

To work around the problem, do one of the following:

1. Change the register value to a nonregister value.

2. Put the quantity (x[p] + y[a]) into a temporary variable, then use
   the temporary.

3. Compile with one or more of -Ol, -Oe, or -Og.

4. Use the C version 6.00a update, which corrects this problem.

A code example, which demonstrates this problem, is shown below:

Code Example
------------

#include <stdio.h>

    unsigned y[200];
    unsigned x[320];
    char buffer[0x4000];
    char far *scrn;

void test(p)
int p;
{
   register a;

   buffer[ x[p] + y[a] ] = scrn[ x[p] + y[a] ];

    }

void main(void)
{
   int b;
   test(b);
}

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