[Cooker] gcc-2.96-0.48mdk

[J . A . Magallon]

Hi,

I check tha attached bug.c on each gcc package release. It is still failing,
and also does with a recent gcc-3 snapshot. Anybody knows if gcc people is
aware of this ?

Bug: x86 low level optimizer is broken for strength-reducion. Attached bug.c
gives bad results when compiled with 'gcc -O2' and ok with
'gcc -O2 -fno-strength-reduce'. Its s86 specific because it does not show
in IRIX nor in Solaris.

-- 
J.A. Magallon                                          #  Let the source
mailto:[EMAIL PROTECTED]                              #  be with you, Luke... 

Linux werewolf 2.4.3-ac3 #1 SMP Thu Apr 5 00:28:45 CEST 2001 i686
#include <stdio.h>

#define SMALL_N  2
#define NUM_ELEM 4

int main(void)
{
  int listElem[NUM_ELEM]={30,2,10,5};
  int listSmall[SMALL_N];
  int i, j;
  int posGreatest=-1, greatest=-1;

  for (i=0; i<SMALL_N; i++) { 
    listSmall[i] = listElem[i];
    if (listElem[i] > greatest) {
      posGreatest = i;
      greatest = listElem[i];
    }
  }
  
  for (i=SMALL_N; i<NUM_ELEM; i++) { 
    if (listElem[i] < greatest) {
      listSmall[posGreatest] = listElem[i];
      posGreatest = 0;
      greatest = listSmall[0];
      for (j=1; j<SMALL_N; j++) 
	  {
	if (listSmall[j] > greatest) {
	  posGreatest = j;
	  greatest = listSmall[j];
	}
	  }
      //printf("%d\n", posGreatest);
    }
  }
 
  printf("Correct output: 5 2\n");
  printf("GCC output: ");
  for (i=0; i<SMALL_N; i++) printf(" %.1d", listSmall[i]);
  printf("\n");
  return (1);
}