------- Comment #33 from =?ISO-8859-1?Q?Tobias_Schl=FCter?= <tobias dot schlueter at physik dot uni-muenchen dot de> 2009-08-15 10:17 ------- Subject: Re: Invariant DO loop variables and subroutines
jv244 at cam dot ac dot uk wrote: > ------- Comment #32 from jv244 at cam dot ac dot uk 2009-08-15 10:05 ------- > (In reply to comment #29) > >> It's the other way around: If output were to modify any of its >> arguments, the program would be illegal. Therefore, the compiler can >> assume that this doesn't happen. Intent(in) would be redundant for this >> particular case (though useful, so the compiler could easier detect >> errors). > that's true for pX, but value can be modified by output. I.e. this is (afaict) > valid fortran that write the numbers from 1 to 10 > n=10 > DO i=1,n > n=0 > write(6,*)i > ENDDO Actually, we're buggy there, and my patch fixes it. I'm just now trying out testcases. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31593
