[Bug tree-optimization/105276] [12 Regression] executed once loop not optimized anymore

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105276

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Andrew Macleod <amacl...@gcc.gnu.org>:

https://gcc.gnu.org/g:362e2a9c6297203bcf7f66bfb51dffb82b42d3b3

commit r12-8246-g362e2a9c6297203bcf7f66bfb51dffb82b42d3b3
Author: Andrew MacLeod <amacl...@redhat.com>
Date:   Mon Apr 25 09:56:35 2022 -0400

    Retain existing range knowledge when prefilling statements.

    When range_of_stmt was adjusted to avoid large recursion depth, we need to
    intersect the calculated range whth the any known range to avoid losing
    info.  Range_of_stmt does this, but the new prefill code missed it.

            PR tree-optimization/105276
            gcc/
            * gimple-range.cc (gimple_ranger::prefill_stmt_dependencies):
Include
            existing global range with calculated value.

            gcc/testsuite/
            * g++.dg/pr105276.C: New.