From: David Edelsohn <dje@watson.ibm.com>
To: dpitts@cozx.com
Cc: gcc@gcc.gnu.org
Subject: Re: Optimizer questions/issues with EBCDIC i370/s390 modes.
Date: Wed, 21 Aug 2002 14:12:00 -0000 [thread overview]
Message-ID: <200208212111.RAA28120@makai.watson.ibm.com> (raw)
In-Reply-To: <3D63FCA5.4090902@cozx.com>
>>>>> Dave Pitts writes:
Dave> I've a few questions concerning the operation of the optimizer when cross
Dave> compiling on an ASCII based system for an EBCDIC based system. These
Dave> things work correctly when compiling natively on an EBCDIC system. I'm
Dave> using the 3.2 release with my i370 changes.
The right place to begin looking for strcpy and printf
optimizations probably is builtins.c and c-common.c.
The asms are trying to inline 32x32->64 multiply and equivalent
divide. I think that impossible reload means that GCC can't figure out
how to generate valid instructions to move the arguments into the
registers required by the asm constraints. Maybe the s390 port can
provide some guidance?
David
next prev parent reply other threads:[~2002-08-21 14:12 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-21 13:51 Dave Pitts
2002-08-21 14:12 ` David Edelsohn [this message]
2002-08-21 16:58 ` Dave Pitts
2002-08-21 19:03 ` David Edelsohn
2002-08-22 7:41 ` Kaveh R. Ghazi
2002-08-22 8:11 ` Dave Pitts
2002-08-22 8:15 ` Dave Pitts
2002-08-22 8:27 ` Kaveh R. Ghazi
2002-08-22 8:31 ` Dave Pitts
2002-08-22 8:48 Ulrich Weigand
2002-08-22 9:05 ` Dave Pitts
2002-08-22 10:21 Ulrich Weigand
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