Re: Benchmarks gcc 3.0.4 (soon 3.1) vs. Intel C++ 6.0

[Daniel Berlin <dberlin at dberlin dot org>]

On Thu, 9 May 2002, Erik Schnetter wrote:

> Tim Prince <tprince at computer dot org> wrote:
> 
> > icc's equivalent to -fstrict-aliasing is -ansi.  It's not a default.
> 
> I couldn't find anything about aliasing in the description of "-ansi".  

It does what he says, however, i can prove it through option dumps (it 
turns on P2OPT_disam_assume_ansi_c)
> However, icc does have a "-falias" option (which is also not the default).  
> The description of "-falias" is unfortunately unusable.

You mean -fno-alias and -fno-fnalias, i thinks.

If you want to see the aliasing/intermediate code dumps for intel's 
compiler, so you can watch what it does at each stage, "-mIPOPT_trace=-1 
-mP1OPT_il0_trace=-1 -mP2OPT_il0_list_source_lines=-1 -mP2OPT_il0_dump=0 
-mIPOPT_opt_trace=-1"  will suffice.

If you want the debug options to print the mod-ref sets and whatnot, let 
me know.


> 
> -erik
> 
>