Hi,

I may have run into a compiler bug accessing 32-bit integers in an array within a struct.

In the code below, the last two bytes of the variable are written with the contents of the Y register instead of the X register, but Y is never loaded with a valid value.

Here is a sample main.c:

#pragma PREPRINT

typedef struct {
  unsigned long ll[2];
} CANRxFrame;

void main(void) {
  CANRxFrame f;
  f.ll[1] = 0x00FF00FF;
  while(1);
}

Here is a sample main.lst:

RCSTM8 COMPILER V2.26.09.317,  MAIN               04/09/10  21:13:02

QCW(0x00963FA0)

RCSTM8 COMPILER V2.26.09.317, COMPILATION OF MODULE MAIN      
OBJECT MODULE PLACED IN C:\Documents and Settings\Brian\My Documents\stm8\rctest\main.obj
COMPILER INVOKED BY: QUIET GENERATEDEPFILE CODE DB OJ(C:\Documents and Settings\Brian\My Documents\stm8\rctest\main.obj) PR(C:\Documents and Settings\Brian\My Documents\stm8\rctest\main.lst) PIN(C:\Program Files\Raisonance\Ride\Inc;C:\Program Files\Raisonance\Ride\Inc\ST7) STM8(SMALL) O(3,SIZE) NOINITSTATICVAR SMALLOBJECT ET(INT) 

stmt level    source
   1          #pragma PREPRINT
   2          
   3          typedef struct {
   4            unsigned long ll[2];
   5          } CANRxFrame;
   6          
   7          void main(void) {
   8   1        CANRxFrame f;
   9   1        f.ll[1] = 0x00FF00FF;
  10   1        while(1);
  11   1      }
  12          
RCSTM8 COMPILER V2.26.09.317
ASSEMBLY LISTING OF GENERATED OBJECT CODE

              ; FUNCTION main (BEGIN)
              ; SOURCE LINE # 7 
0000 5208                              SUB    SP,#008H
              ; SOURCE LINE # 9 
0002 AE00FF                            LDW    X,#000FFH
0005 1F05       F                      LDW    (005H,SP),X
0007 1707       F                      LDW    (007H,SP),Y
0009         ?WHILE_0001:
              ; SOURCE LINE # 10 
0009 20FE                              JRA    ?WHILE_0001
              ; f             struct (size=8-Alg)(size=8-Alg).  variable  in AUTO

              ; FUNCTION main (END)

RCSTM8 COMPILER V2.26.09.317


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     11    ----
   CONSTANT SIZE    =   ----    ----
   DATA SIZE        =   ----    ----
   PAGE0 SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.

RCSTM8 COMPILATION COMPLETE.  0 WARNING,  0 ERROR