Hi, apparently it is necessary to check that type sizes match before attempting to fold-V_C_E them in evaluate_conditions_for_known_args. So this patch does this.
It passes bootstrap and testing on x86_64-linux and I have verified with a cross compiler that the reported bug is fixed (the generated assembly is the same as before the commit which introduced the problem). OK for trunk and (after a bootstrap and testing there) the 4.9 branch? Thanks, Martin 2014-12-02 Martin Jambor <mjam...@suse.cz> PR ipa/64153 * ipa-inline-analysis.c (evaluate_conditions_for_known_args): Check type sizes before view_converting. Index: src/gcc/ipa-inline-analysis.c =================================================================== --- src.orig/gcc/ipa-inline-analysis.c +++ src/gcc/ipa-inline-analysis.c @@ -880,12 +880,19 @@ evaluate_conditions_for_known_args (stru } if (c->code == IS_NOT_CONSTANT || c->code == CHANGED) continue; - val = fold_unary (VIEW_CONVERT_EXPR, TREE_TYPE (c->val), val); - res = val - ? fold_binary_to_constant (c->code, boolean_type_node, val, c->val) - : NULL; - if (res && integer_zerop (res)) - continue; + + if (operand_equal_p (TYPE_SIZE (TREE_TYPE (c->val)), + TYPE_SIZE (TREE_TYPE (val)), 0)) + { + val = fold_unary (VIEW_CONVERT_EXPR, TREE_TYPE (c->val), val); + + res = val + ? fold_binary_to_constant (c->code, boolean_type_node, val, c->val) + : NULL; + + if (res && integer_zerop (res)) + continue; + } clause |= 1 << (i + predicate_first_dynamic_condition); } return clause;