sdcc/support/regression/tests/bug-3733.c

   1 /** A bad z80 peephole optimizer rule created invalid asm
   2 */
   3
   4 // Based on code sample under GPL 2.0 or later
   5 #include <stdio.h>
   6 #include <stdint.h>
   7 #include <stdbool.h>
   8
   9 #include <testfwk.h>
  10
  11 #pragma disable_warning 85
  12
  13 void vdu_sprite_position_set16( uint8_t id, uint8_t tile, uint8_t x, uint8_t y, uint8_t colour ) {}
  14
  15 ///< Show patch - set tiles
  16 uint8_t vdu_patch_crop_impl( uint8_t id, int8_t col, int8_t row,
  17     int8_t width, int8_t offset, const uint8_t *counts, const uint8_t *colours,
  18     int8_t cols, int8_t rows, uint8_t tile_offset, bool zoom ) {
  19
  20     int16_t px = col;
  21     int16_t py = rows;
  22
  23     do {
  24
  25         uint8_t x = cols;
  26         do {
  27
  28             uint8_t count = 1;
  29
  30             do {
  31                 vdu_sprite_position_set16( id++, tile_offset, px, py, *colours++ ); // The bad asm happened in code for passing parameters here.
  32
  33             } while ( --count );
  34
  35             px++;
  36             counts++;
  37
  38         } while( --x );
  39
  40     } while ( --rows );
  41
  42     return 0;
  43 }
  44
  45 void
  46 testBug(void)
  47 {
  48     uint8_t c = 0;
  49     vdu_patch_crop_impl(0, 0, 0, 0, 0, &c, &c, 1, 1, 0, 0);
  50 }
  51