On Wed, Oct 7, 2026 at 10:30 AM Stefan Schulze Frielinghaus <[email protected]> wrote: > > This is a follow-up for > https://gcc.gnu.org/pipermail/gcc-patches/2026-September/732868.html > Changes include: > - Document optional second argument for .CLZ/.CTZ > - Do a final defined-at-zero test in vectorizable_call > - Fold zero test for .CLZ/.CTZ over vector modes in match.pd > - s390: add more tests; rework c[lt]zi2 pattern using SI mode result > > Bootstrapped and regtested on > - aarch64-unknown-linux-gnu > - powerpc64le-unknown-linux-gnu > - s390x-ibm-linux-gnu > - x86_64-pc-linux-gnu > Ok for mainline?
The series is OK. Thanks, Richard. > Stefan Schulze Frielinghaus (3): > s390: Rework clz/ctz > vect: Defined-at-zero value for .CLZ/.CTZ > match.pd: Fold zero test for .CLZ/.CTZ over vector modes > > gcc/config/i386/i386.h | 4 +- > gcc/config/rs6000/rs6000.h | 4 +- > gcc/config/s390/s390.h | 6 +- > gcc/config/s390/s390.md | 3 + > gcc/config/s390/vector.md | 27 +- > gcc/doc/ifn.texi | 10 +- > gcc/match.pd | 18 +- > gcc/testsuite/gcc.dg/tree-ssa/pr123311-2.c | 1 + > gcc/testsuite/gcc.target/s390/clz-ctz-1.c | 462 +++++++++++++++++++++ > gcc/tree-vect-patterns.cc | 22 +- > gcc/tree-vect-stmts.cc | 13 + > 11 files changed, 538 insertions(+), 32 deletions(-) > create mode 100644 gcc/testsuite/gcc.target/s390/clz-ctz-1.c > > -- > 2.55.0 >
