https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66618
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Author: jakub Date: Sun Nov 19 17:17:01 2017 New Revision: 254930 URL: https://gcc.gnu.org/viewcvs?rev=254930&root=gcc&view=rev Log: PR c/66618 PR c/69960 c-family/ * c-common.h (c_fully_fold): Add LVAL argument defaulted to false. c/ * c-parser.c (c_parser_omp_atomic): Pass true as LVAL to c_fully_fold where needed. * c-typeck.c (build_unary_op, build_modify_expr, build_asm_expr, handle_omp_array_sections): Likewise. (digest_init): Don't call decl_constant_value_for_optimization. * c-tree.h (decl_constant_value_for_optimization): Removed. * c-fold.c (c_fold_array_ref): New function. (c_fully_fold_internal): Add LVAL argument, propagate it through recursive calls. For VAR_P call decl_constant_value and unshare if not LVAL and either optimizing or IN_INIT. Remove decl_constant_value_for_optimization calls. If IN_INIT and not LVAL, fold ARRAY_REF with STRING_CST and INTEGER_CST operands. (c_fully_fold): Add LVAL argument, pass it through to c_fully_fold_internal. (decl_constant_value_for_optimization): Removed. cp/ * cp-gimplify.c (c_fully_fold): Add LVAL argument, call cp_fold_maybe_rvalue instead of cp_fold_rvalue and pass it !LVAL. testsuite/ * gcc.dg/pr69960.c: New test. * gcc.dg/pr66618.c: New test. * gcc.dg/pr66618-2.c: New test. Added: trunk/gcc/testsuite/gcc.dg/pr66618-2.c trunk/gcc/testsuite/gcc.dg/pr66618.c trunk/gcc/testsuite/gcc.dg/pr69960.c Modified: trunk/gcc/c-family/ChangeLog trunk/gcc/c-family/c-common.h trunk/gcc/c/ChangeLog trunk/gcc/c/c-fold.c trunk/gcc/c/c-parser.c trunk/gcc/c/c-tree.h trunk/gcc/c/c-typeck.c trunk/gcc/cp/ChangeLog trunk/gcc/cp/cp-gimplify.c trunk/gcc/testsuite/ChangeLog
