https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101008
--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-11 branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:8cd45af39ddc14fc77017a2d4c2aceb9a915ab4b commit r11-8593-g8cd45af39ddc14fc77017a2d4c2aceb9a915ab4b Author: Jakub Jelinek <ja...@redhat.com> Date: Fri Jun 11 12:59:43 2021 +0200 simplify-rtx: Fix up simplify_logical_relational_operation for vector IOR [PR101008] simplify_relational_operation callees typically return just const0_rtx or const_true_rtx and then simplify_relational_operation attempts to fix that up if the comparison result has vector mode, or floating mode, or punt if it has scalar mode and vector mode operands (it doesn't know how exactly to deal with the scalar masks). But, simplify_logical_relational_operation has a special case, where it attempts to fold (x < y) | (x >= y) etc. and if it determines it is always true, it just returns const_true_rtx, without doing the dances that simplify_relational_operation does. That results in an ICE on the following testcase, where such folding happens during expansion (of debug stmts into DEBUG_INSNs) and we ICE because all of sudden a VOIDmode rtx appears where it expects a vector (V4SImode) rtx. The following patch fixes that by moving the adjustement into a separate helper routine and using it from both simplify_relational_operation and simplify_logical_relational_operation. 2021-06-11 Jakub Jelinek <ja...@redhat.com> PR rtl-optimization/101008 * simplify-rtx.c (relational_result): New function. (simplify_logical_relational_operation, simplify_relational_operation): Use it. (cherry picked from commit 4bdcdd8fa8d7659e5a19a930cf2f0332127f8a46)
