[llvm] r232769 - libLTO, llvm-lto, gold: Introduce flag for controlling optimization level.

[Ahmed Bougacha]

On Thu, Mar 19, 2015 at 3:01 PM, Peter Collingbourne <peter at pcc.me.uk> wrote:
> +static cl::opt<char>
> +OptLevel("O",
> +         cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
> +                  "(default = '-O2')"),

This means LTO now defaults to -O2 - rather than the previous -O3 -
for CodeGenOpt, right?  That seems like a somewhat important change,
affecting all LTO users.

Don't get me wrong, I think it's for the best, but people involved
with performance might be interested in this.

-Ahmed