Article: Q67358
Product(s): See article
Version(s): 6.00 6.00a | 6.00 6.00a
Operating System(s): MS-DOS | OS/2
Keyword(s): ENDUSER | buglist6.00 buglist6.00a | mspl13_c
Last Modified: 4-DEC-1990
The sample code below produces the following internal compiler errors
under different versions of the compiler. These problems occur when
any of the following individual optimizations are used under the small
and medium memory models:
/Oa /Oc /Oi /On /Op /Or /Os /Ot /Ow /Oz
Under C 6.00a
-------------
test.c(7) : fatal error C1001: Internal Compiler Error
(compiler file '@(#)regMD.c:1.110', line 4688)
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Under C 6.00
------------
test.c(7) : fatal error C1001: Internal Compiler Error
(compiler file '@(#)regMD.c:1.100', line 4634)
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The following are four possible workarounds:
1. Add one of the following optimizations:
/Od /Oe /Og /Ol /Ox
2. Do not declare the structure variables of type register.
3. Use an if-else statement instead of the ternary operator.
4. Compile under the compact or large memory models.
Sample Code
-----------
1: void main(void)
2: {
3: register int *boo, *hoo;
4: int n;
5:
6: boo=hoo;
7: n= *boo ? 1 / *boo : 1;
8: }
Microsoft has confirmed this to be a problem in C versions 6.00 and
6.00a. We are researching this problem and will post new information
here as it becomes available.