diff options
Diffstat (limited to 'gcc/fortran/trans-expr.cc')
| -rw-r--r-- | gcc/fortran/trans-expr.cc | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/fortran/trans-expr.cc b/gcc/fortran/trans-expr.cc index 3c209bc..63e3cf9 100644 --- a/gcc/fortran/trans-expr.cc +++ b/gcc/fortran/trans-expr.cc @@ -6392,6 +6392,30 @@ gfc_conv_procedure_call (gfc_se * se, gfc_symbol * sym, else { gfc_conv_expr (&parmse, e); + + /* ABI: actual arguments to CHARACTER(len=1),VALUE + dummy arguments are actually passed by value. + Constant strings are truncated to length 1. + The BIND(C) case is handled elsewhere. */ + if (fsym->ts.type == BT_CHARACTER + && !fsym->ts.is_c_interop + && fsym->ts.u.cl->length->expr_type == EXPR_CONSTANT + && fsym->ts.u.cl->length->ts.type == BT_INTEGER + && (mpz_cmp_ui + (fsym->ts.u.cl->length->value.integer, 1) == 0)) + { + if (e->expr_type != EXPR_CONSTANT) + parmse.expr = gfc_string_to_single_character + (build_int_cst (gfc_charlen_type_node, 1), + parmse.expr, + e->ts.kind); + else if (e->value.character.length > 1) + { + e->value.character.length = 1; + gfc_conv_expr (&parmse, e); + } + } + if (fsym->attr.optional && fsym->ts.type != BT_CLASS && fsym->ts.type != BT_DERIVED) |