[Bug target/18723] [C] gcc 3.4.4 zeroes inline function argument with "-O2 -march=pentium4"

[rguenth at gcc dot gnu dot org]

--- Comment #8 from rguenth at gcc dot gnu dot org  2008-01-25 20:49 ---
No response, closing as invalid as of comment #4.


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rguenth at gcc dot gnu dot org changed:

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 Resolution||INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18723

[Bug target/18723] [C] gcc 3.4.4 zeroes inline function argument with "-O2 -march=pentium4"

[rguenth at gcc dot gnu dot org]

--- Comment #7 from rguenth at gcc dot gnu dot org  2007-09-23 12:21 ---
Can you verify the bug still occurs with a still maintained version of GCC? 
That
is, GCC 4.2.1 or trunk.  Thanks.


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rguenth at gcc dot gnu dot org changed:

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18723

[Bug target/18723] [C] gcc 3.4.4 zeroes inline function argument with "-O2 -march=pentium4"

[ebotcazou at gcc dot gnu dot org]

--- Additional Comments From ebotcazou at gcc dot gnu dot org  2005-03-02 
08:01 ---
> If -fno-strict-aliasing fixes the problem, then you have an aliasing problem
in > the source. So closing as invalid.

Ugh! If compilers were that simple... -fno-strict-aliasing disables a whole
class of optimizations; in particular, it will hide any stack slot sharing 
problem.

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 Status|RESOLVED|UNCONFIRMED
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18723

[Bug target/18723] [C] gcc 3.4.4 zeroes inline function argument with "-O2 -march=pentium4"

[pinskia at gcc dot gnu dot org]

--- Additional Comments From pinskia at gcc dot gnu dot org  2005-03-02 
00:54 ---
If -fno-strict-aliasing fixes the problem, then you have an aliasing problem in 
the source.
So closing as invalid.

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   What|Removed |Added

 Status|UNCONFIRMED |RESOLVED
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18723

[Bug target/18723] [C] gcc 3.4.4 zeroes inline function argument with "-O2 -march=pentium4"

[thrall at vss dot fsi dot com]

--- Additional Comments From thrall at vss dot fsi dot com  2004-11-29 
19:38 ---
-fno-strict-aliasing does make the segfault go away, but changing the line like 
you suggested does not (the assembly for handleButtonEvent is exactly the same 
up to the place it zeroes event, and it still segfaults in exactly the same 
place).

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18723

[Bug target/18723] [C] gcc 3.4.4 zeroes inline function argument with "-O2 -march=pentium4"

[pinskia at gcc dot gnu dot org]

--- Additional Comments From pinskia at gcc dot gnu dot org  2004-11-29 
18:08 ---
Can you try something?
try with -fno-strict-aliasing -O2 -march=pentium4.

Then if that works try changing the following line:
  but_event = (XButtonEvent *) event;
to
  but_even = &event->xbutton.

And if that fixes the problem then this is not a bug.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18723

[Bug target/18723] [C] gcc 3.4.4 zeroes inline function argument with "-O2 -march=pentium4"

[pinskia at gcc dot gnu dot org]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18723