This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: [PATCH] Eliminates phi on branch for CMP result
On Sun, May 12, 2019 at 10:07:28PM -0500, Jiufu Guo wrote:
> To elimiate the instructions which moving result of CMP to GPR, I'm
> wondering maybe we could do a combine(or a peephole) after bbro to let
> the condition jump directly using the result of CMP.
It will have to be a peephole. And peepholes are machine-specific.
You will also not get any further optimisations in those blocks, that way;
not combine etc.
It really should be done on gimple, not rtl.
Segher