sdcc/support/regression/tests/bug3403429.c

   1 /*
   2    bug3403429.c
   3 */
   4
   5 #include "testfwk.h"
   6
   7 void PTBL (signed char col, signed char row, unsigned char spN)
   8 {
   9   col;
  10   row;
  11   spN;
  12 }
  13
  14 signed char C [4+1][2+1];
  15 unsigned int gm;
  16
  17 signed char i;
  18
  19 void Sub_9000 (void)
  20 {
  21   {
  22     unsigned char i, j;
  23     for( i=0; i<=36; i+=4 )
  24     {
  25       for( j=0; j<=23; j+=8 )
  26       {
  27         PTBL(i,j,98);
  28         PTBL(30-i,20-j,98);
  29       }
  30     }
  31   }
  32
  33   if( gm==0 )
  34   {
  35     C[ 1][1]=10; C[ 1][2]=10;
  36     C[ 2][1]=10; C[ 2][2]=10;
  37     C[ 3][1]=10; C[ 3][2]=10;
  38     C[ 4][1]=10; C[ 4][2]=10;
  39
  40     for(i=4; i!=0; i--) // <-- BUG IS HERE
  41     {
  42       /* the calculation of the address of C[i] is pulled out of the loop
  43          and on top of that the local (out of scope) unsigned char i is used
  44          instead of the global signed char i */
  45       C[i][1]=0;
  46       C[i][2]=0;
  47     }
  48   }
  49 }
  50
  51 void testBug(void)
  52 {
  53   unsigned int i;
  54
  55   i;
  56
  57   gm = 0;
  58
  59   Sub_9000();
  60
  61   for(i = 1; i <= 4; i++)
  62     {
  63       ASSERT(C[i][1] == 0);
  64       ASSERT(C[i][2] == 0);
  65     }
  66 }