On 3/23/23 5:38 AM, Ajit Agarwal wrote:
> This patch removed unnecessary signed extension elimination in ree pass.
> Bootstrapped and regtested on powerpc64-linux-gnu.
>
>
> Thanks & Regards
> Ajit
>
> rtl-optimization: ppc backend generates unnecessary signed extension.
>
> Eliminate unnecessary redundant signed extension.
>
> 2023-03-23 Ajit Kumar Agarwal <aagar...@linux.ibm.com>
>
> gcc/ChangeLog:
>
> * ree.cc: Modification for AND opcode support to eliminate
> unnecessary signed extension.
> * testsuite/g++.target/powerpc/sext-elim.C: New tests.
Not a review of the patch, but we talked offline about other bugzillas
regarding unnecessary sign and zero extensions. Doing a quick scan, I
see the following bugs. Please have a look at 1) whether these are
still a problem with unpatched trunk, and if they are, 2) whether your
patch fixes them or could fix them. Thanks.
https://gcc.gnu.org/PR41742
https://gcc.gnu.org/PR65010
https://gcc.gnu.org/PR82940
https://gcc.gnu.org/PR107949
Peter
