Re: Inner loop unable to compute sufficient information during vectorization

2009-05-26 Thread Ira Rosen
gcc-ow...@gcc.gnu.org wrote on 25/05/2009 21:53:41: > for a loop like > > 1 for(i=0;i 2 for(j=0;j 3 a[i][j] = a[i][j]+b[i][j]; > > GCC 4.3.* is unable to get the information for the inner loop that > array reference 'a' is alias of each other and generates code f

March=native with a main 64bit system and 32bit chroot

2009-05-26 Thread Luca Zorzo
Hi all, I've a main Gentoo 64bit system with CHOST="x86_64-pc-linux-gnu" and CFLAGS="-march=native -mtune=native -O2 -pipe -fomit-frame-pointer". My cpu is a Pentium 4 Prescott and i'm using gcc-4.3.2. With this little script: "echo 'float x(float x){return x < 0 ? -x : x;}' > x.c && gcc -fverbose

Intermediate representation

2009-05-26 Thread Nicolas COLLIN
Hello again, I 'm still working on egcs 1.1 and the function cp_namespace_decls is not implemented in. I just want to get the classes and functions implemented in my source code and I tried to get them with the function gettags but I think I didn't understand something. I tried to read some th

Intermediate representation

2009-05-26 Thread Nicolas COLLIN
Hello again, to answer your question my code's purpose is to write a kind of tree in a file, the main arborescence is the classes, their method (with parameters, return type, ...), their attributes, etc... it will also recognize some new keywords I will introduce thanks to "__attribute__". In

Re: March=native with a main 64bit system and 32bit chroot

2009-05-26 Thread Ian Lance Taylor
Luca Zorzo writes: > I've a main Gentoo 64bit system with CHOST="x86_64-pc-linux-gnu" and > CFLAGS="-march=native -mtune=native -O2 -pipe -fomit-frame-pointer". > My cpu is a Pentium 4 Prescott and i'm using gcc-4.3.2. > > With this little script: > "echo 'float x(float x){return x < 0 ? -x : x;}

Re: Intermediate representation

2009-05-26 Thread Dave Korn
Nicolas COLLIN wrote: > Hello again, > > I 'm still working on egcs 1.1 and the function cp_namespace_decls is > not implemented in. Well, the definition is very simple tree cp_namespace_decls (tree ns) { return NAMESPACE_LEVEL (ns)->names; } and NAMESPACE_LEVEL exists in egcs-1.1, so why n

gcc-4.4-20090526 is now available

2009-05-26 Thread gccadmin
Snapshot gcc-4.4-20090526 is now available on ftp://gcc.gnu.org/pub/gcc/snapshots/4.4-20090526/ and on various mirrors, see http://gcc.gnu.org/mirrors.html for details. This snapshot has been generated from the GCC 4.4 SVN branch with the following options: svn://gcc.gnu.org/svn/gcc/branches

Re: Seeking suggestion

2009-05-26 Thread Jim Wilson
Jamie Prescott wrote: Is there a reason why something like this would not work? if (!TARGET_XXX2) emit_clobber(gen_rtx_REG(CCmode, CC_REGNUM)); emit_insn(gen_addsi3_nc(operands[0], operands[1], operands[2])); Yes. The optimizer will not know that addsi3_nc uses CC_REGNUM, as it

4.4: march-native gives -mno-sse4, but cpuinfo sse4_1

2009-05-26 Thread sean darcy
If I run gcc -fverbose-asm -mtune=native -march=native -S x.c I get cat x.s: .file "x.c" # GNU C (GCC) version 4.4.0 20090506 (Red Hat 4.4.0-4) (x86_64-redhat-linux) # compiled by GNU C version 4.4.0 20090506 (Red Hat 4.4.0-4), GMP version 4.2.4, MPFR version 2.4.1. # GGC heuristic

Re: 4.4: march-native gives -mno-sse4, but cpuinfo sse4_1

2009-05-26 Thread Ian Lance Taylor
sean darcy writes: > If I run gcc -fverbose-asm -mtune=native -march=native -S x.c > > I get > cat x.s: > .file "x.c" > # GNU C (GCC) version 4.4.0 20090506 (Red Hat 4.4.0-4) (x86_64-redhat-linux) > # compiled by GNU C version 4.4.0 20090506 (Red Hat 4.4.0-4), GMP > version 4.2.4, MPF