Re: pgcc optimizations

Peter Moulder (reiter@netspace.net.au)
20 Dec 1998 14:37:27 +1100

> BTW, according to pgcc's web site to get the maximum, safe,
> optimizations using their compiler you should use the -O6 option.

I have had a bug report that (on his machine) is repeatable with
different kernel compiles and different .config settings with pgcc -O6,
but neither he nor I can repeat it with gcc 2.7.2.

Btw, note that I haven't really investigated this (I don't have a
pentium or pgcc and my x86 asm knowledge is slim), so it is possible
that the C code in question relies on unspecified or undefined
behaviour. (gcc -Wall doesn't complain, though.)

pjm.

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