https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97260
--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:efc9ccbfd0ca4da6bf0aba913df6f77f56044dc2 commit r11-6922-gefc9ccbfd0ca4da6bf0aba913df6f77f56044dc2 Author: Jakub Jelinek <ja...@redhat.com> Date: Wed Jan 27 10:08:46 2021 +0100 varpool: Restore GENERIC TREE_READONLY automatic var optimization [PR7260] In 4.8 and earlier we used to fold the following to 0 during GENERIC folding, but we don't do that anymore because ctor_for_folding etc. has been turned into a GIMPLE centric API, but as the testcase shows, it is invoked even during GENERIC folding and there the automatic vars still should have meaningful initializers. I've verified that the C++ FE drops TREE_READONLY on automatic vars with const qualified types if they require non-constant (runtime) initialization. 2021-01-27 Jakub Jelinek <ja...@redhat.com> PR tree-optimization/97260 * varpool.c: Include tree-pass.h. (ctor_for_folding): In GENERIC return DECL_INITIAL for TREE_READONLY non-TREE_SIDE_EFFECTS automatic variables. * gcc.dg/tree-ssa/pr97260.c: New test.
