Re: crosstool-ng: cross compiler for -mach=arm4vt (Cirrus Logic EP93xx target)

[Khem Raj <raj.khem@gmail.com>]

On (11/09/09 23:20), Martin Guy wrote:
> On 9/11/09, ng@piments.com <ng@piments.com> wrote:
> >  I see you're posting patch sets for 4.2 and 4.3. I recall you said
> > somewhere that 4.2.x produced faster ARM code. Is that still your
> > experience?
> 
> THere's some extra measurements I didn't post there: using differen
> GCCs to compile gcc-4.3.4, and measuring the size of the different
> GCCs themselves and the size of the object code they generate and the
> maximum memory they use to do it (compiling insn_recog.c as a rule):
> 
>         --the compiler itself-- --on gcc-4.3.2 stage1--
> Version  gcc     cc1     cc1    Elapsed Max VM  xgcc
>          text    text    data   time    used    text
> gcc-3.4  79579  3862155   3236  4m30    104128  209509
> gcc-4.0  86429  4579965  10208  4m44    111104  225846
> gcc-4.1 193369  5115620  15976  4m56    123264  226469
> gcc-4.2 188582  5490547  17364  4m50    112128  221171
> gcc-4.3 203918* 7010746 420820  6m41    157440  227755
> gcc-4.4 202989* 9431805 546128  8m21    170550  249260
> llvm4.2 189365                  4m56     67136  236957

Did you compile exact same insn_recog.c source ?
if not then you are comparing apples to pineapples.

-Khem
> 
> so 4.2 shows an unexpected dip in its own size, its memory use, the
> time it takes to run and the size of its output code.
> (Maybe it was just gathering its strength for the exponential growth
> from 4.3 onwards :)
> 
>    M
> 
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