Bug#186937: [hppa, PR target/10271] Floating point args don't get reloaded across function calls at -O2

[Matthias Klose <doko@cs.tu-berlin.de>]

retitle 186937 [fixed in 3.3] [hppa, PR target/10271] Floating point args don't get reloaded across function calls at -O2 
forwarded 186937 gcc-gnats@gcc.gnu.org
thanks

Randolph Chung writes:
> Package: gcc-3.2
> Severity: important
> 
> [Debian note: this may be related to #185184 and #105816]
> 
> When compiling the bug.c code below with -O2, the floating point 
> argument to the fprintf does not get reloaded for the second fprintf() 
> call, so the second call prints junk. At -O1 the arguments (r23/r24) 
> are properly reloaded.
>  
> Compile with gcc -O2 -o bug bug.c -lm
> $ ./bug
> nan
> 1.422968e-309
> 
> With -O1
> $ ./bug
> nan
> nan
> 
> ------8< bug.c 8<--------
> #include <stdio.h>
> #include <math.h>
> 
> void doprint(double dval)
> {
>         fprintf(stdout, "%e\n", dval);
>         fprintf(stdout, "%e\n", dval);
> }
> 
> int main(int argc, char **argv)
> {
>         doprint(log(-8)); /* nan */
>         return 0;
> } 
> 
> 
> 
> -- 
> To UNSUBSCRIBE, email to debian-gcc-request@lists.debian.org
> with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.org