Re: gcc build on FC18 and automake 1.11

2013-03-27 Thread Ian Lance Taylor
On Wed, Mar 27, 2013 at 2:04 PM, Nenad Vukicevic wrote: > The latest Fedora Core 18 comes with automake 1.12.1 and perl 5.16.2. I > installed and tried to use automake 1.11.1 for one of the GCC libraries, but > got a warning from aclocal: > > main::scan_file() called too early to check prototype a

Typo in GCC 4.8 release page

2013-03-27 Thread Foone Turing
This page: http://gcc.gnu.org/gcc-4.8/ under "release history" says GCC 4.8 was released on March 22, 2012. This should be 2013, not 2012.

gcc build on FC18 and automake 1.11

2013-03-27 Thread Nenad Vukicevic
The latest Fedora Core 18 comes with automake 1.12.1 and perl 5.16.2. I installed and tried to use automake 1.11.1 for one of the GCC libraries, but got a warning from aclocal: main::scan_file() called too early to check prototype at /usr/local/bin/aclocal line 617. The latest 1.11.6 has the

Re: Debugging C++ Function Calls

2013-03-27 Thread Tom Tromey
> "Lawrence" == Lawrence Crowl writes: Lawrence> Are the symbol searches specific to the scope context, or does it Lawrence> search all globally defined symbols? I am not totally certain in this case, but in gdb many searches are global, so that "print something" works even if "something" is

Re: [Patch, testsuite] Add missing -gdwarf-2 flag in debug/dwarf2 testcase

2013-03-27 Thread Mike Stump
On Mar 27, 2013, at 1:02 AM, Senthil Kumar Selvaraj wrote: > global-used-types.c in gcc/testsuite/gcc.dg/debug/dwarf2 only specifies > -g in dg-options. For a target that is not configured to generate > dwarf-2 by default, the test fails looking for specific DWARF strings in > the generated assem

Re: _Alignas attribute and HOST_BITS_PER_INT

2013-03-27 Thread Joseph S. Myers
On Wed, 27 Mar 2013, Senthil Kumar Selvaraj wrote: > Hi, > > I was looking at why gcc.dg/c1x-align-3.c (test for errors, line 15) is > failing for the AVR target, and I found that the test expects _Alignas > with -__INT_MAX__ - 1 to fail with a "too large" error. It expects either an error eithe

Identifying Compiler Options to Minimise Energy Consumption for Embedded Platforms

2013-03-27 Thread James Pallister
Hi, I posted a while ago about a project between Embecosm and the University of Bristol. In this project we explored the effect that a wide range of optimisations had on the execution time and energy consumption of a variety of benchmarks. The project has been written up, and results and conclu

_Alignas attribute and HOST_BITS_PER_INT

2013-03-27 Thread Senthil Kumar Selvaraj
Hi, I was looking at why gcc.dg/c1x-align-3.c (test for errors, line 15) is failing for the AVR target, and I found that the test expects _Alignas with -__INT_MAX__ - 1 to fail with a "too large" error. I looked at the code responsible for generating the error (c-common.c, check_user_alignment) a

Re: cond_exec no-ops in RTL optimisations

2013-03-27 Thread Eric Botcazou
> While working with some splitters I noticed that the RTL optimisation > passes do not optimise away a no-op wrapped in a cond_exec. > > So for example, if my splitter generates something like: > (cond_exec (lt:SI (reg:CC CC_REGNUM) (const_int 0)) >(set (match_dup 1) >

Re: Widening multiplication limitations

2013-03-27 Thread Frederic Riss
On 27 March 2013 10:05, Richard Biener wrote: > On Tue, Mar 26, 2013 at 6:30 PM, Frederic Riss > wrote: >> Here, the code trying to expand a signed by unsigned widening multiply >> explicitly checks that the operand isn't a constant. Why is that? I >> removed that condition to try to find the fa

Re: expmed.c cost calculation limited to word size

2013-03-27 Thread Frederic Riss
On 27 March 2013 10:10, Richard Biener wrote: > On Tue, Mar 26, 2013 at 6:55 PM, Frederic Riss > wrote: >> The cost arrays are filled up to >> MAX_BITS_PER_WORD, thus as a temporary workaround I have defined >> MAX_BITS_PER_WORD to 64, and I have softened the checks to fail only >> above MAX_BIT

Re: Problem in understanding points-to analysis

2013-03-27 Thread Richard Biener
On Wed, Mar 27, 2013 at 3:13 AM, Nikhil Patil wrote: > Hello everyone, > > I am trying to understand the points-to analysis ("pta") ipa pass, but > I am not able to match the information generated by the pass and that > in structure "SSA_NAME_PTR_INFO". > > For the code segment, > > --

Re: expmed.c cost calculation limited to word size

2013-03-27 Thread Richard Biener
On Tue, Mar 26, 2013 at 6:55 PM, Frederic Riss wrote: > While working on having the divisions by constants optimized by my GCC > targeting, I realized that whatever *muldi3_highpart my backend > provides, it would never be used because of the bounds checks that > expmed.c does on the cost arrays.

Re: Widening multiplication limitations

2013-03-27 Thread Richard Biener
On Tue, Mar 26, 2013 at 6:30 PM, Frederic Riss wrote: > I was playing with adding support of the various modes of widening > multiplies on my backend, and hit some restrictions in the expansion > code that I couldn't explain to myself. These restrictions only impact > the signed by unsigned versio

[Patch, testsuite] Add missing -gdwarf-2 flag in debug/dwarf2 testcase

2013-03-27 Thread Senthil Kumar Selvaraj
Hi, global-used-types.c in gcc/testsuite/gcc.dg/debug/dwarf2 only specifies -g in dg-options. For a target that is not configured to generate dwarf-2 by default, the test fails looking for specific DWARF strings in the generated assembly. The patch below changes dg-options to -gdwarf-2. Can someo