Hi,
Please consider following testcase which is a core of PR c++/28236.
typedef enum { X, Y } E;
int f( E e )
{
switch ( e )
{
case X: return -1;
case Y: return +1;
}
}
In this example g++ produces a warning:
e.cpp: In function ‘int f(E)’:
Mark Mitchell wrote:
> For GCC, what happens (though we need not document it) is that the
> value is converted to the underlying type -- but not masked down
> to { 0, 1 }, because that masking would be costly.
> So, "((int) e == 7)" may be true after the assignment above.
> (Perhaps, in some mode
François-Xavier Coudert napisał(a):
$ gcc -march=pentium4 -O3 a.c && time ./a.out
064069fbc13963b920219c3e939225e38e38e38e3956d81c71c71c71c0ba0f00
./a.out 1.81s user 0.00s system 99% cpu 1.818 total
$ gcc-4.3 -march=pentium4 -O3 a.c && time ./a.out
064069fbc13963b920219c3e939225e38e38e38e3956d8
Richard Guenther napisał(a):
On 2/20/07, Mark Mitchell <[EMAIL PROTECTED]> wrote:
So, my feeling is that the best course of action is to set a relatively
low threshold for GCC 4.2.0 and target 4.2.0 RC1 soon: say, March 10th.
Then, we'll have a 4.2.0 release by (worst case, and allowing fo
On Monday 12 of March 2007 19:47:21 Mark Mitchell wrote:
> * PR 29906 (Oliva) -- This is a crash during DWARF generation for a
> small C++ test case.
+= PR 29202.
ps).
the PR 30052 (aliasing related) is still unconfirmed.
On Tuesday 01 of May 2007 20:08:25 Mark Mitchell wrote:
> GCC 4.2 RC2 is now available from:
>
> ftp://gcc.gnu.org/pub/gcc/prerelease-4.2.0-20070430
>
> There is a known serious problem with RC2: Ada does not build.
> Therefore, there will be an RC3 shortly.
there're two more 4.2-only problems w
On Monday, June 20, 2011 03:01:47 PM Jakub Jelinek wrote:
> The first release candidate for GCC 4.6.1 is available from
>
> ftp://gcc.gnu.org/pub/gcc/snapshots/4.6.1-RC-20110620
>
> and shortly its mirrors. It has been generated from SVN revision 175201.
>
> I have so far bootstrapped and tes
On Saturday 20 of August 2011 14:51:44 sudhakar govindavajhala wrote:
> Hi there,
>
> I am writing C++ code in Linux (2.6.18) using pthreads. glibc 2.5. gcc 4.1.2
>
> 2) I would like to translate SIGSEGV or SIGFPE to an exception in the
> program so that it can be caught at higher levels. Is th
On Thursday 26 of January 2012 09:52:22 Ulrich Drepper wrote:
> I think gcc is missing an option since -mavx controls two different
> things. First, the generation of VEX-encoded instructions. Second,
> the use of ymm registers. The latter is not always available when the
> former is and using V
hi,
during development a cross platform appliacation on x86 workstation
i've enabled an alignemnt checking [1] to catch possible erroneous
code before it appears on client's sparc/arm cpu with sigbus ;)
it works pretty fine and catches alignment violations but Jakub Jelinek
had told me (on glibc
On Monday 08 March 2010 16:46:10 Richard Guenther wrote:
> 2010/3/8 Paweł Sikora :
> > hi,
> >
> > during development a cross platform appliacation on x86 workstation
> > i've enabled an alignemnt checking [1] to catch possible erroneous
> > code before it
hi,
i would like to ask why the LTO forces libelf-0.8.x in configure.ac?
linux/unix distros have well tested elfutils-libelf subpackage,
so what is the point in forcing new library?
i've just built (with little hack) gcc/trunk with elfutils-libelf
and lto works fine.
BR,
Pawel.
Dnia 11-03-2010 o 14:51:39 H.J. Lu napisał(a):
checking for libelf/gelf.h... no
checking for the correct version of libelf... yes
I am using elfutils-libelf 0.145.
ahh, right. i've accidentally used an older version 0.142
which libelf.h contains only:
extern int elf_getshstrndx (Elf *__elf,
On Friday 23 April 2010 22:05:56 HyperQuantum wrote:
> On Fri, Apr 23, 2010 at 9:58 PM, HyperQuantum
wrote:
> > On Fri, Apr 23, 2010 at 8:39 PM, Manuel López-Ibáñez
> >
> > wrote:
> >> What reasons keep you from contributing to GCC?
> >
> > The lack of time, for the most part.
>
> I submitted
On Friday 23 April 2010 22:36:21 Manuel López-Ibáñez wrote:
> (...). In the free-software world, you can actually help to fix it.
> (...) we need more contributors. Wanna help?
i haven't so much free time (c++work/family/studies) for learn internal
gcc structures and non-trivial design to start f
On Wednesday 28 of January 2009 17:39:39 Andrew Haley wrote:
> Zoltán Kócsi wrote:
> >> No, this is since C90; nothing has changed in this area. NULL
> >> doesn't mean "address 0", it means "nothing". The C statement
> >>
> >> if (ptr)
> >>
> >> doesn't mean "if ptr does not point to address ze
On Thursday 29 April 2010 20:35:23 Steven Bosscher wrote:
> The standard 1st questions are:
> 1) Did you compile with -Wall -Wextra and solve all warnings?
> 2) Did you try with -fno-strict-aliasing?
for legacy code, the '-fwrapv' could be helpful.
Hi,
the opt_random.h header includes unconditionally and
breaks crytopp build
(redefinition of _mm_shuffle_epi8 in cpu.h).
could you please add #ifdef __SSSE3__ around this include?
BR,
Paweł.
cpu.h @ cryptopp:
(...)
#if !defined(__GNUC__) || defined(__SSSE3__) ||
defined(__INTEL_COMPILER)
W dniu 2014-04-17 12:13, Jonathan Wakely napisał(a):
On 17 April 2014 10:38, Paweł Sikora wrote:
Hi,
the opt_random.h header includes unconditionally and
breaks
crytopp build
(redefinition of _mm_shuffle_epi8 in cpu.h).
could you please add #ifdef __SSSE3__ around this include?
Do you
On Friday 10 of February 2012 13:30:25 James Courtier-Dutton wrote:
> On 10 February 2012 10:42, Andrew Haley wrote:
> > On 02/10/2012 10:07 AM, Richard Guenther wrote:
> >>
> >> The issue with libm in glibc here is that Drepper absolutely does
> >> not want new ABIs in libm - he believes that for
On Friday 10 of February 2012 17:41:49 Andrew Haley wrote:
> On 02/10/2012 05:31 PM, Paweł Sikora wrote:
> > it would be also nice to see functions for reducing argument range in
> > public api.
> > finally the end-user can use e.g. sin(reduce(x)) to get the best precision
&
On Friday 02 of March 2012 14:44:45 Richard Guenther wrote:
>
> GCC 4.7.0 Release Candidate available from gcc.gnu.org
>
> The first release candidate for GCC 4.7.0 is available from
>
> ftp://gcc.gnu.org/pub/gcc/snapshots/4.7.0-RC-20120302
>
> and shortly its mirrors. It has been generated f
On Tuesday 13 of March 2012 17:02:01 Richard Henderson wrote:
> So, I've got something put together. I think it should be fairly scalable.
> As a test I've thrown in some ARM overrides.
>
> See
>
> git://repo.or.cz/gcc/rth.git rth/libatomic
>
> which is a gcc tree with a libatomic subdir.
>
On Wednesday 14 of March 2012 12:22:41 Richard Guenther wrote:
>
> GCC 4.7.0 Release Candidate available from gcc.gnu.org
>
> A second release candidate for GCC 4.7.0 is available from
>
> ftp://gcc.gnu.org/pub/gcc/snapshots/4.7.0-RC-20120314
>
> and shortly its mirrors. It has been generated
On Tuesday 03 of April 2012 13:37:50 Diego Novillo wrote:
>
> Concurrently with this, Lawrence and Ian are working on the C++ coding
> guidelines. The draft is stored at http://gcc.gnu.org/wiki/CppConventions.
what about using http://astyle.sourceforge.net/astyle.html for code checkers?
what ab
On Tuesday 03 of April 2012 13:51:56 Ian Lance Taylor wrote:
> Paweł Sikora writes:
>
> > On Tuesday 03 of April 2012 13:37:50 Diego Novillo wrote:
> >>
> >> Concurrently with this, Lawrence and Ian are working on the C++ coding
> >> guidelines. The dra
On Tuesday 10 of April 2012 10:46:14 Jakub Jelinek wrote:
> On Mon, Apr 09, 2012 at 04:34:32PM -0700, Xinliang David Li wrote:
> > Class hierarchy is one such feature that is useful. Assuming we have
> > two hierarchies for gcc: one for values rooted at ValExp, and one for
> > gimple stmts rooted a
On Wednesday 11 of April 2012 12:35:18 Diego Novillo wrote:
> I have created the SVN branch cxx-conversion to host all the
> mini-projects aimed at exploring the C++ conversion. Everyone is
> welcome to contribute to it.
>
> The branch has been configured to build in C++ mode by default.
>
> I h
On Wednesday 11 of April 2012 11:43:36 Richard Guenther wrote:
> > () The overloadable operator new means that memory can be
> > _implicitly_ allocated in the right place.
>
> Implicit allocation is bad. In a compiler you want to _see_ where you
> spend memory.
in c++ you can overload new/delet
On Thursday 31 of May 2012 22:58:32 Jonathan Wakely wrote:
> On 31 May 2012 22:39, Jonathan Wakely wrote:
> > On 31 May 2012 22:35, James Y Knight wrote:
> >> I understand that the ABI changes generally cannot be avoided, but a lot
> >> of pain for a lot of people could be avoided by making things
On Wednesday 29 of August 2012 00:22:55 Ian Lance Taylor wrote:
> I've spent the last couple of days working on a stack backtrace library.
>
> It uses the GCC unwind interface to collect a stack trace, and parses
> DWARF debug info to get file/line/function information. (Of course it's
> silly to
On Wednesday 29 of August 2012 11:37:07 Ian Lance Taylor wrote:
> On Wed, Aug 29, 2012 at 1:07 AM, Paweł Sikora wrote:
> > On Wednesday 29 of August 2012 00:22:55 Ian Lance Taylor wrote:
> >> I've spent the last couple of days working on a stack backtrace library.
> >
On Friday 22 of February 2008 21:08:10 Guillermo Ballester Valor wrote:
> ../../../native/jni/classpath/.libs/jcl.o -ljack -m32 -m32 -m32
> -Wl,-soname -Wl,libgjsmdssi.so -o .libs/libgjsmdssi.so
> /usr/lib64/gcc/x86_64-suse-linux/4.2.1/../../../../x86_64-suse-linux/bin/ld
>: skipping incompatib
Hi all,
I noticed (readelf -lW/grep) that some gcc libraries require executable stack:
/usr/lib64/libffi.so.4.0.1 GNU_STACK 0x00 0x
0x 0x00 0x00 RWE 0x8
/usr/lib64/libgcj.so.8.0.0 GNU_STACK 0x00 0x000
6/6/2008, "Arne Steinarson" <[EMAIL PROTECTED]> napisał/a:
>The shared libraries themselves still
>have a dependency on libgcc_s.so:
>
> $ ldd libwx_gtk2ud_fwb_core-2.9.so.0 | grep gcc
> libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xb6ee8000)
you can use the -nodefaultlibs and manually add what yo
On Thursday 19 of June 2008 19:26:27 Ian Lance Taylor wrote:
> Jens-Michael Hoffmann <[EMAIL PROTECTED]> writes:
> >> No. I've flipped the branch to start compiling the source files in
> >> gcc with C++. Unfortunately a number of issues will need to be
> >> addressed before all the code will comp
On Sunday 22 of June 2008 13:17:38 Joseph S. Myers wrote:
> Status
> ==
>
> The GCC 4.3 branch is open for commits under normal release branch
> rules. The 4.3.2 release is expected around 2008-08-06.
>
> Quality Data
>
>
> Priority# Change from Last Report
>
On Friday 26 of October 2007 19:40:34 Joe Buck wrote:
> Some programs try to isolate the details of where the headers are by
> having one header with #ifdefs that, in turn, does the #include of
> , but many others do not.
I think you shouldn't care about implementation specific #include .
I'm usi
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