c/1956: Internal compiler error related to nested function/optimisation

[a dot p dot selby at pobox dot com]

>Number:         1956
>Category:       c
>Synopsis:       Internal compiler error related to nested function/optimisation
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 12 17:16:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Alex Selby
>Release:        gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)
>Organization:
>Environment:
Linux 2.2.16-3, x86
>Description:
The following error message occurs

../../gcc/function.c:3274: Internal compiler error in function instantiate_virtual_regs_1

Seems to happen (with slightly varying error messages)
using any version of gcc I've tried it with,
including the CodeSourcery online compiler.
>How-To-Repeat:
Compile this file with -c -O3

main(){
  int j;
  double *prb;
  
  for(j=0;j<100;j++)prb[j]=0;
  
  {
    double f(){
      double p;
      int i;
      for(i=0;i<j;i++)p+=prb[i];
    }
  }

}
>Fix:
Unknown
>Release-Note:
>Audit-Trail:
>Unformatted: