Why can't this information be used to optimize comparisons?
My patch caused GCC to infer that x & 7 > 7 is false. But I couldn't
think of a quick way to use this to optimize away the check, because
then GCC crashed.
Does it work only for consecutive ands?
Or is it just an early constant
Hello,
I have currently a reproducable seg fault from an exe produced by gcc
4.0.1 (*). It does not appear using gcc 2.95, 3.2, 3.3, 3.4.
If I run it throught gdb I get:
0x402814b1 in __gnu_cxx::__pool::_M_reclaim_block () from
/usr/lib/libstdc++.so.6
(gdb) bt
#0 0x402814b1 in __gnu_cxx::_
Hello,
While reading the function pre_edge_insert () in gcse.c, something
didn't make sense to me:
According to the documentation:
/* Where PRE_INSERT_MAP is nonzero, we add the expression on that edge
if it reaches any of the deleted expressions. */
I understand that before inserting an expr
> If what I'm saying here is correct, some redundant expression might
> be inserted.
We have testcases (search bugzilla for GCSE) with redundant expressions
being inserted by GCSE (repeatedly, such that if you run GCSE 5 times,
it inserts the same expression 5 times in the same place). If you ar
Andrew Walrond wrote:
Can anybody explain what this error might mean?
/tmp/gcc-3-3.heretix/work/gcc/xgcc "" -B/tmp/gcc-3-3.heretix/work/gcc/
^^^
-c ../../../../gcc-3.3.6/libstdc++-v3/libsupc++/guard.cc -fPIC -DPIC -o
guard.o
On Fri, Aug 26, 2005 at 05:03:08PM +0100, Joern RENNECKE wrote:
> java uses char_type_node for its character type, which is 16 bits.
> gcc/java/decl.c:747 java_init_decl_processing:
> TYPE_PRECISION (char_type_node) = 16;
>
> On the other hand, tree.c uses char_type_node as the type of the
> sma
On Sunday 28 August 2005 16:06, Kean Johnston wrote:
> Andrew Walrond wrote:
> > Can anybody explain what this error might mean?
> >
> > /tmp/gcc-3-3.heretix/work/gcc/xgcc "" -B/tmp/gcc-3-3.heretix/work/gcc/
>
> ^^^
>
> > -c ../../../../gcc-3.3.6/libstdc++-v3/
[Sorry for the way-late response... was on vacation]
On Fri, Aug 19, 2005 at 02:16:53PM -0700, Ian Lance Taylor wrote:
> > The idea of letting gcc load a .so to do the checking also seems fine.
> > At least then the checking language is a standard one, not one we made
> > up.
I think this is a wo
Kevin McBride <[EMAIL PROTECTED]> writes:
> If you look closely, you can see that %edi can be automatically loaded
> directly without problems, and that (%eax) can be directly loaded into
> (%esp). Is this behavior intentional (for bugs I don't know about in
> earlier processors) or could this op
Maybe I should avoid making suggestions that would make the project
more complex, especially since I'm not implementing it, but...
If we can describe the argument types expected for a given format
string, then we can produce warnings for values used but not yet set
(%s with an uninitialized
> Output from running srcdir/config.guess. Do not send that file itself, just
the one-line output from running it.
i586-pc-linux-gnu
> The output of gcc -v for your newly installed gcc. This tells us which
version of GCC you built and the options you passed to configure.
Using built-in specs
Everyone,
Please take notice that I am appealing my bug (number 23605) to the
steering committee of GCC on the basis that it is a legimate
bug/enhancement in need of a through research. I believe that Andrew
Pinski is trying to keep the research from occuring by means of marking
the bug as inval
On Sun, 2005-08-28 at 18:48 -0400, Kevin McBride wrote:
> Everyone,
>
> Please take notice that I am appealing my bug (number 23605) to the
> steering committee of GCC on the basis that it is a legimate
> bug/enhancement in need of a through research.
The Steering committee really doesn't get i
Kevin McBride <[EMAIL PROTECTED]> writes:
> Please take notice that I am appealing my bug (number 23605) to the
> steering committee of GCC on the basis that it is a legimate
> bug/enhancement in need of a through research. I believe that Andrew
> Pinski is trying to keep the research from occuri
Libtool ...
automatically implies
Something is very fscked up
I have had no end of bad luck, and very little good luck,
with libtool. Not to mention that its use (at least in
stock 1.4.3) breaks paradigms like 'make install DESTDIR=blah'
But this is gcc list, not a libtool list, so I will j
Does anyone know of the status of --enable-mapped-location? I tried to
do a bootstrap and test and I got a lot of failures due to getting the
wrong line number and file for the error message when dealing with
macros.
Thanks,
Andrew Pinski
In gcc/g++ version 4.0 there is no way to turn off the
unused variable warning enabled by -Wall with a command
line switch.
I think this is a bug: it should be possible to selectively
turn on or off all warnings (on the command line).
The advice in the documentation is to attach
__attribute__(
On Sun, Aug 28, 2005 at 06:48:17PM -0400, Kevin McBride wrote:
> Please take notice that I am appealing my bug (number 23605) to the
> steering committee of GCC on the basis that it is a legimate
> bug/enhancement in need of a through research. I believe that Andrew
> Pinski is trying to keep the
Joe Buck wrote:
I've looked at the bug in bugzilla; it's not marked as invalid, though
I tend to agree with Andrew and Ian's comments in the log.
I set the bug back to unconfirmed after I noticed that, in my opinion,
there can be more optimization done.
In any case, the SC doesn't get invol
Andrew Pinski wrote:
Does anyone know of the status of --enable-mapped-location? I tried to
do a bootstrap and test and I got a lot of failures due to getting the
wrong line number and file for the error message when dealing with macros.
I haven't had time to work on gcc for a while, but I'm h
It appears that the ia64 port introduced the internal define
MASK_GNU_AS that is used the same was as the historical MASK_GAS
define. There was some discussion of this about 5 years ago as part
of a larger discussion about possible user level changes.
It would seem to be a pretty simple change to
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