Created attachment 615119 [details]
ccSQoup9.out file (requested to attach)

Description of problem:  Bug in C compiler 

Here is the C code

#include<stdio.h>
int main()
{ int i,j,a,b,p;
 a = 997; b = 23; p = 1048573;
 for( i=0; i<10000; i++ ) {
     a = a+b;
     for( j=0; j<10000; j++ ) { b ++; a += a*b; }
 }
 printf("a=%d\n",a);
}



Steps to Reproduce:
1.  compile with  cc -O3  <file.c>

  
Actual results:

divmul.c: In function ‘main’:
divmul.c:3:5: internal compiler error: in vect_create_epilog_for_reduction, at tree-vect-loop.c:3739
Please submit a full bug report, with preprocessed source if appropriate.


Expected results:   compile with no errors


Additional info:  It compiles okay with other orderings of code e.g.

#include<stdio.h>
int main()
{ int i,j,a,b,p;
 a = 997; b = 23; p = 1048573;
 for( i=0; i<10000; i++ ) {
     for( j=0; j<10000; j++ ) { b ++; a += a*b; }
     a = a+b;
 }
 printf("a=%d\n",a);
}