https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109865
GARY.WHITE at ColoState dot edu <Gary.White at ColoState dot edu> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|WAITING |RESOLVED
--- Comment #16 from GARY.WHITE at ColoState dot edu <Gary.White at ColoState
dot edu> ---
I resolved the issue. The parameter ir was declared intent(out) in subroutine
mc11ad, but there was a check in an if statement to see if ir == 0, meaning ir
was defined on input. This check followed code that set ir when n == 1, and
this was never executed when the code did not produce correct answers. Anyway,
changing intent(out) to intent(in out) resolved the -O3 optimization issue and
the code works as expected.
I guess its too much to expect that the compiler would detect that a parameter
was actually being access before being set if the parameter is declared
intent(out) only.
