This is all about dead code.
To avoid this change 'if' to:
if(p>=cmd_buf+1)
...
or just do not write dead code :)
I have no idea why gcc pukes this code instead of stripping it down.
~d
On Monday 02 June 2003 19:12, Steve Underwood wrote:
> Daniel Néri wrote:
> > Hello,
> >
> >
> >I have some code (preprocessed source attached below), that gives me
> >an ICE when compiled with optimisations enabled (either -O or -O2):
> >
> > $ msp430-gcc -save-temps -c -O2 cmd.c
> > cmd.c: In function `cmd_read':
> > cmd.c:50: Internal compiler error in redirect_edge_and_branch, at
> > cfgrtl.c:902 Please submit a full bug report,
> > with preprocessed source if appropriate.
> > See <URL:http://gcc.gnu.org/bugs.html> for instructions.
> >
> >
> >I use GCC 3.2.3 with mspgcc patches from less than an hour ago.
> >
> >
> >Best wishes,
> > --Daniel
>
> If I strip your test case down to the following, it still gives the same
> error. I hope this makes a simpler test case for Dmitry.
>
> Regards,
> Steve
>
>
> enum cmd_status
> {
> CMD_OK
> };
>
> struct cmd_cfg
> {
> enum cmd_status (*eval)(const char *, unsigned int);
> };
>
>
> static char cmd_buf[32];
>
> unsigned int cmd_read(const struct cmd_cfg *cfg)
> {
> char *p = cmd_buf;
>
> switch (getc())
> {
> case '\b':
> if (p > cmd_buf)
> --p;
> break;
> }
> }
>
>
>
>
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