https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104159
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by David Malcolm <dmalc...@gcc.gnu.org>: https://gcc.gnu.org/g:45b999f642a531c083c982dda79fa6ad65730a7c commit r12-6817-g45b999f642a531c083c982dda79fa6ad65730a7c Author: David Malcolm <dmalc...@redhat.com> Date: Fri Jan 21 09:56:56 2022 -0500 analyzer: fix ICE on vector casts [PR104159] PR analyzer/104159 describes an ICE attempting to convert a vector_cst, which occurs when symbolically executing within a recursive call on: _4 = BIT_FIELD_REF <w_3(D), 32, 0>; _1 = VIEW_CONVERT_EXPR<T>(_4); where the BIT_FIELD_REF leads to a get_or_create_cast from VEC<long, 8> to VEC<unsigned 4> which get_code_for_cast erroneously picks NOP_EXPR for the cast, leading to a bogus input to the VIEW_CONVERT_EXPR. This patch fixes the issue by giving up on attempts to cast symbolic values of vector types, treating the result of such casts as unknowable. gcc/analyzer/ChangeLog: PR analyzer/104159 * region-model-manager.cc (region_model_manager::get_or_create_cast): Bail out if the types are the same. Don't attempt to handle casts involving vector types. gcc/testsuite/ChangeLog: PR analyzer/104159 * gcc.dg/analyzer/torture/pr104159.c: New test. Signed-off-by: David Malcolm <dmalc...@redhat.com>
