From 5c28da2454101fb1e45eb9b89985b0f15a0e58b5 Mon Sep 17 00:00:00 2001 From: Richard Stallman Date: Thu, 4 Nov 1993 19:38:34 +0000 Subject: [PATCH] (finish_enum): Always make an enum signed if it will fit. From-SVN: r5996 --- gcc/c-decl.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/gcc/c-decl.c b/gcc/c-decl.c index bb2ad125c1a..26a0bfbc8c3 100644 --- a/gcc/c-decl.c +++ b/gcc/c-decl.c @@ -5566,8 +5566,12 @@ finish_enum (enumtype, values) TYPE_SIZE (enumtype) = 0; layout_type (enumtype); - /* An enum can have some negative values; then it is signed. */ - TREE_UNSIGNED (enumtype) = ! tree_int_cst_lt (minnode, integer_zero_node); + /* If an enum has no negative values, and it goes beyond the range + of the signed integral type, make it unsigned. */ + TREE_UNSIGNED (enumtype) + = (! tree_int_cst_lt (minnode, integer_zero_node) + && ! tree_int_cst_lt (maxnode, + TYPE_MAX_VALUE (type_for_size (precision, 0)))); /* Change the type of the enumerators to be the enum type. Formerly this was done only for enums that fit in an int, -- 2.30.2