sdcc/support/regression/tests/bug-3471.c

   1 /* bug-3459.c
   2    A bug in code generation for restoring registers after a builtin call.
   3  */
   4
   5 #include <testfwk.h>
   6
   7 #pragma disable_warning 85
   8
   9 // Based on code by "Under4Mhz" licensed under GPL 2.0 or later
  10
  11 #include <string.h>
  12 #include <stdint.h>
  13 #include <stdarg.h>
  14
  15 const char TextPunc[] = ":%! ";
  16
  17 #define TEXT_SPACE ( TEXT_PUNC + 3 )
  18 #define TEXT_UPPER ( TEXT_NUM + 10 )
  19 #define TEXT_PUNC ( TEXT_UPPER + 26 )
  20 #define TEXT_NUM ( TEXT_START + 0 )
  21 #define TEXT_START 0
  22
  23 int myprintf( const char *restrict format, ... );
  24
  25 void ImageCompleteText( uint8_t x, uint8_t y, const char *text ) {
  26
  27     while( *text ) {
  28
  29         uint8_t ch = *text++;
  30
  31         uint8_t index = 0;
  32         uint8_t start = TEXT_SPACE;
  33
  34         if ( ch == ' ' ) ;
  35         else{
  36
  37             char *ptr = strchr( TextPunc, ch ); // One of the two bytes of the result of this builtin call got corrupted.
  38             if ( ptr )
  39             {
  40                 index = ptr - TextPunc;
  41                 start = TEXT_PUNC;
  42             }
  43         }
  44
  45         myprintf( "%d %d %c\n", index, start, ch );
  46
  47         x += 2;
  48     }
  49 }
  50
  51 int myprintf ( const char *restrict format, ... )
  52 {
  53         int index, start, ch;
  54         va_list v;
  55         va_start ( v, format );
  56         index = va_arg ( v, int );
  57         ASSERT (index == 2);
  58         start = va_arg ( v, int );
  59         ASSERT (start == 36);
  60         ch = va_arg ( v, int );
  61         ASSERT (ch == '!');
  62         va_end ( v );
  63 }
  64
  65 void
  66 testBug( void) {
  67     ImageCompleteText(0,0,"!");
  68 }
  69