https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107329
--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The trunk branch has been updated by Jason Merrill <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:049a52909075117f5112971cc83952af2a818bc1 commit r13-5318-g049a52909075117f5112971cc83952af2a818bc1 Author: Jason Merrill <ja...@redhat.com> Date: Mon Jan 23 16:25:07 2023 -0500 c++: TARGET_EXPR collapsing [PR107303] In r13-2978 I tried to eliminate TARGET_EXPR around TARGET_EXPR by discarding the outer one, but as in this testcase that breaks if the TARGET_EXPR_SLOT of the outer one is used elsewhere. But it should always be safe to strip the inner one; if its slot were reused, there would be a COMPOUND_EXPR around the TARGET_EXPR. For 107329, if we're setting *walk_subtrees, we also need to fold TARGET_EXPR_CLEANUP. PR c++/107303 PR c++/107329 gcc/cp/ChangeLog: * cp-gimplify.cc (cp_fold_r) [TARGET_EXPR]: In case of double TARGET_EXPR, keep the outer one instead of the inner one. (maybe_replace_decl): New. gcc/testsuite/ChangeLog: * g++.dg/ext/builtin-shufflevector-5.C: New test. * g++.dg/init/new51.C: New test.
