retitle 186937 [fixed in 3.3] [hppa, PR target/10271] Floating point args don't
get reloaded across function calls at -O2
forwarded 186937 [EMAIL PROTECTED]
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;
> }
>
>
>
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