performance regressions, profiling _of_ gcc

[Steven Bosscher]

Op wo 09-04-2003, om 12:55 schreef Jan Van Dijk:
> To this end I need more detailed information than -ftime-report gives me. 

You can get profile information from gprof (from binutils). To create a
profiling compiler, I suggest you bootstrap and install a compiler, and
use that compiler to build (i.e. make, not make bootstrap) a compiler
with CFLAGS=-pg LDFLAGS=-pg.

gcov can give you coverage information with gcov (part of GCC).  It is
documented in the GCC manual.

> and bootstrapped the compiler, but I am clueless how to proceed. I was 
> assuming that running the new compiler on some test file would result in 
> files suitable for analysis _of gcc_ with gcov/gprof, but nothing seems to 
> appear.

Maybe you have tried to profile the compiler driver?  You should profile
the compiler itself (i.e. cc1, cc1plus, etc).

Hope this helps,

Greetz
Steven