On Feb 20, 2017, Richard Biener <richard.guent...@gmail.com> wrote: > On Fri, Feb 17, 2017 at 4:18 PM, Martin Liška <mli...@suse.cz> wrote: >> Hello. >> >> We should not have a default value (different from -1) that is smaller than >> minimum. >> >> Ready to be installed after tests?
> I think you should instead change the minimum value. > But OTOH I wonder why this is a --param at all... Alex? Why's this > not just a #define > inside emit-rtl.c? In what circumstances is the user supposed to > alter this --param? It's convenient to debug -fcompare-debug errors. You set the param to a large number, and then non-debug insns will get the same uid in both debug and non-debug compilations, so it's easier to compare RTL dumps (using the attached gcc-diff-dump; I thought it was in contrib, but it's not; should I put it there?) and locate the differences.
gcc-diff-dump
Description: Bourne shell script
-- Alexandre Oliva, freedom fighter http://FSFLA.org/~lxoliva/ You must be the change you wish to see in the world. -- Gandhi Be Free! -- http://FSFLA.org/ FSF Latin America board member Free Software Evangelist|Red Hat Brasil GNU Toolchain Engineer
