autoconf-patches
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: changing "configure" to default to "gcc -g -O2 -fwrapv ..."


From: Robert Dewar
Subject: Re: changing "configure" to default to "gcc -g -O2 -fwrapv ..."
Date: Sat, 30 Dec 2006 19:19:03 -0500
User-agent: Thunderbird 1.5.0.9 (Windows/20061207)

Andrew Pinski wrote:

-fwrapv-in-all-cases-except-loop-bounds


Again, please don't this the default for Fortran as integer
overflow has been undefined since at least 1977 so I don't think
it is a good idea for GCC in general anyways as evidence of Fortran.

-- Pinski

Well the question is whether the optimization buys anything
in practice for other than the loop bound case, I am guessing
it does not, and if that is the case there is an argument
for uniformity.





reply via email to

[Prev in Thread] Current Thread [Next in Thread]