https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99777
--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-8 branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:1ee66d06f25d5bf14e2f3b599fc391dc3d532722 commit r8-10902-g1ee66d06f25d5bf14e2f3b599fc391dc3d532722 Author: Jakub Jelinek <ja...@redhat.com> Date: Mon Mar 29 12:35:32 2021 +0200 fold-const: Fix ICE in extract_muldiv_1 [PR99777] extract_muldiv{,_1} is apparently only prepared to handle scalar integer operations, the callers ensure it by only calling it if the divisor or one of the multiplicands is INTEGER_CST and because neither multiplication nor division nor modulo are really supported e.g. for pointer types, nullptr type etc. But the CASE_CONVERT handling doesn't really check if it isn't a cast from some other type kind, so on the testcase we end up trying to build MULT_EXPR in POINTER_TYPE which ICEs. A few years ago Marek has added ANY_INTEGRAL_TYPE_P checks to two spots, but the code uses TYPE_PRECISION which means something completely different for vector types, etc. So IMNSHO we should just punt on conversions from non-integrals or non-scalar integrals. 2021-03-29 Jakub Jelinek <ja...@redhat.com> PR tree-optimization/99777 * fold-const.c (extract_muldiv_1): For conversions, punt on casts from types other than scalar integral types. * g++.dg/torture/pr99777.C: New test. (cherry picked from commit afe9a630eae114665e77402ea083201c9d406e99)
