RE: h8300: less optimal (buggy?) compiler output with last build

[Kazu Hirata <kazu at hxi dot com>]

Hi Ralf,

> extern unsigned char volatile TCW;
> 
> inline Watchdog()
> {
>   TCW = 0;
> }
> 
> void testcase_1(void)
> {
>   TCW = 0;
> }
> 
> void testcase_2(void)
> {
>   Watchdog();
> }
> 
> The h8 assembler source (compiled with -Os -fomit-frame-pointer):
> 
> testcase_1: sub   r2l, r2l
>             mov.b r2l, TCW
>             rts
> 
> testcase_2: sub   r2l, r2l
>             mov.b r2l, TCW
>             mov.b TCW, r2l  ; <-- ????
>             rts

This sounds serious.  I am using the latest gcc from the cvs, but this
problem did not happen.  Does your version actually output TCW, not @_TCW?
Have you applied any patches that are not in the cvs?

Kazu Hirata