Re: target/7559: kdelibs miscompilation

[Andreas Jaeger <aj at suse dot de>]

The following reply was made to PR target/7559; it has been noted by GNATS.

From: Andreas Jaeger <aj@suse.de>
To: Jan Hubicka <jh@suse.cz>
Cc: Gwenole Beauchesne <gbeauchesne@mandrakesoft.com>,
	gcc-gnats@gcc.gnu.org, david@mandrakesoft.com, nobody@gcc.gnu.org,
	gcc-prs@gcc.gnu.org, gcc-bugs@gcc.gnu.org
Subject: Re: target/7559: kdelibs miscompilation
Date: Sun, 11 Aug 2002 15:22:33 +0200

 Honza,
 
 since you fixed this bug: Can you add the testcase to the testsuite,
 please?  Please also remember to close the PR.
 
 Thanks a lot for the quick patch,
 Andreas
 
 Jan Hubicka <jh@suse.cz> writes:
 
 >> 3) The last testcase is ultra-reduced to a two eightbytes object, with 
 >> only one member in each one. That one do fails.
 >> 
 >> extern void abort();
 >> 
 >> struct A {
 >>   long x;
 >> };
 >> 
 >> struct R {
 >>   struct A a, b;
 >> };
 >> 
 >> struct R R = {
 >>   100, 200
 >> };
 >> 
 >> void f(struct R r) {
 >>   if (r.a.x != R.a.x || r.b.x != R.b.x)
 >>     abort();
 >> }
 >> 
 >> int main() {
 >>   f(R);
 >>   return 0;
 >> }
 >
 > This looks like a bug in code computing offests of nested aggregates.  I
 > am just checking it.
 > Thanks a lot for reducing the testcase! This is really usefull one :)
 >
 > Honza
 >> 
 >> 4) The <struct.c> testcase won't fail if we add some garbage in struct R, 
 >> because the size of the object will be > 16 bytes, thus having MEMORY 
 >> class.
 >> 
 >> HTH,
 >> Gwenole.
 >
 -- 
  Andreas Jaeger
   SuSE Labs aj@suse.de
    private aj@arthur.inka.de
     http://www.suse.de/~aj