diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index c214ef7..f0dd878 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -7623,11 +7623,18 @@ fold_builtin_isdigit (tree arglist) else { /* Transform isdigit(c) -> (unsigned)(c) - '0' <= 9. */ - /* According to the C standard, isdigit is unaffected by locale. */ - tree arg = TREE_VALUE (arglist); - arg = fold_convert (unsigned_type_node, arg); + /* According to the C standard, isdigit is unaffected by locale. + However, it definitely is affected by the target character set. */ + tree arg; + unsigned HOST_WIDE_INT target_digit0 + = lang_hooks.to_target_charset ('0'); + + if (target_digit0 == 0) + return NULL_TREE; + + arg = fold_convert (unsigned_type_node, TREE_VALUE (arglist)); arg = build2 (MINUS_EXPR, unsigned_type_node, arg, - build_int_cst (unsigned_type_node, TARGET_DIGIT0)); + build_int_cst (unsigned_type_node, target_digit0)); arg = build2 (LE_EXPR, integer_type_node, arg, build_int_cst (unsigned_type_node, 9)); arg = fold (arg); |