https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110334
--- Comment #17 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jan Hubicka <hubi...@gcc.gnu.org>: https://gcc.gnu.org/g:d88fd2e1d0720e6f892da9ff48e9a301a7ad0ad4 commit r14-2172-gd88fd2e1d0720e6f892da9ff48e9a301a7ad0ad4 Author: Jan Hubicka <j...@suse.cz> Date: Wed Jun 28 23:05:28 2023 +0200 Enable early inlining into always_inline functions Early inliner currently skips always_inline functions and moreover we ignore calls from always_inline in ipa_reverse_postorder. This leads to disabling most of propagation done using early optimization that is quite bad when early inline functions are not leaf functions, which is now quite common in libstdc++. This patch instead of fully disabling the inline checks calls in callee. I am quite conservative about what can be inlined as this patch is bit touchy anyway. To avoid problems with always_inline being optimized after early inline I extended inline_always_inline_functions to lazilly compute fnsummary when needed. gcc/ChangeLog: PR middle-end/110334 * ipa-fnsummary.h (ipa_fn_summary): Add safe_to_inline_to_always_inline. * ipa-inline.cc (can_early_inline_edge_p): ICE if SSA is not built; do cycle checking for always_inline functions. (inline_always_inline_functions): Be recrusive; watch for cycles; do not updat overall summary. (early_inliner): Do not give up on always_inlines. * ipa-utils.cc (ipa_reverse_postorder): Do not skip always inlines. gcc/testsuite/ChangeLog: PR middle-end/110334 * g++.dg/opt/pr66119.C: Disable early inlining. * gcc.c-torture/compile/pr110334.c: New test. * gcc.dg/tree-ssa/pr110334.c: New test.
