Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!shadooby!samsung!uunet!mcsun!hp4nl!ruuinf!praxis!edwin
From: edwin@praxis.cs.ruu.nl (Edwin Kremer)
Newsgroups: comp.sys.hp
Subject: Re: Possible HP-UX compiler optimizer bug (found while making Perl)
Message-ID: <1785@ruuinf.cs.ruu.nl>
Date: 9 Nov 89 21:35:31 GMT
References: <4413@fmeed1.UUCP>
Sender: news@ruuinf.cs.ruu.nl
Lines: 23

In article <4413@fmeed1.UUCP> wehr@fmeed1.UUCP (Bruce Wehr) writes:

  > We just got Perl 3.0 from c.s.u.  Making it on our HP 9000/370 running
  > HP-UX 6.5 with the optimizer caused the compiler to hang on these files:
  > eval.c (&& teval.c), toke.c (&& ttoke.c), x2p/walk.c.  These files had
  > to be manually compiled without the optimizer (we told Configure to use
  > -O).

Refer to the chapter of about the C optimizer in your HP-UX 6.5
Upgradenotes file. The -O flag causes the peephole optimizer to
use the highest implemented optimize level. This is not properly
implemented; I've a few pieces of C code that either crash or hang
the compiler. I always use "+O1", that causes the compiler to use
the usual (6.2) optimize level.


						--[ Edwin ]--

--
Edwin Kremer, Department of Computer Science, University of Utrecht
Padualaan 14,  P.O. Box 80.089,  3508 TB  Utrecht,  The Netherlands
Phone : +31 - 30 - 534104     |     Telefax: +31 - 30 - 513791
E-Mail: edwin@cs.ruu.nl       |     UUCP to: ...!hp4nl!ruuinf!edwin