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From: "szir at sch dot bme dot hu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/39593] faulty value assignment
Date: Tue, 31 Mar 2009 00:20:00 -0000	[thread overview]
Message-ID: <20090331002042.4673.qmail@sourceware.org> (raw)
In-Reply-To: <bug-39593-10417@http.gcc.gnu.org/bugzilla/>



------- Comment #6 from szir at sch dot bme dot hu  2009-03-31 00:20 -------
(In reply to comment #3)
>  BYTE b[4];
>  *((DWORD *)b) = x;
> this is violating aliasing rules.  Does adding -fno-strict-aliasing allow this
> to work?

If you look at the code you can see it is never called, the only code that is
actually called at all is the InitTF() assignments, the rest is just junk, that
confuses the compiler.

And -fno-strict-aliasing does not help, by the way the junk code works just
fine, that is not the problem. Thanks anyway, I added -fno-strict-aliasing to
makefile.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39593


  parent reply	other threads:[~2009-03-31  0:20 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-30 23:50 [Bug c/39593] New: " szir at sch dot bme dot hu
2009-03-30 23:53 ` [Bug c/39593] " szir at sch dot bme dot hu
2009-03-30 23:54 ` [Bug target/39593] " pinskia at gcc dot gnu dot org
2009-03-30 23:56 ` szir at sch dot bme dot hu
2009-03-30 23:57 ` pinskia at gcc dot gnu dot org
2009-03-30 23:59 ` szir at sch dot bme dot hu
2009-03-31  0:09 ` szir at sch dot bme dot hu
2009-03-31  0:20 ` szir at sch dot bme dot hu [this message]
2009-03-31  9:44 ` rguenth at gcc dot gnu dot org
2009-03-31 12:05 ` szir at sch dot bme dot hu
2009-03-31 12:11 ` szir at sch dot bme dot hu
2009-04-06 22:38 ` [Bug target/39593] [avr] " eric dot weddington at atmel dot com

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