always put a mode into assembler constraints

diff --git a/ast2firm.c b/ast2firm.c
index 71172df..19ff39f 100644 (file)
--- a/ast2firm.c
+++ b/ast2firm.c
@@ -5194,7 +5194,7 @@ static void asm_statement_to_firm(const asm_statement_t *statement)
                        ir_asm_constraint constraint;
                        constraint.pos              = pos;
                        constraint.constraint       = new_id_from_str(constraints);
-                       constraint.mode             = NULL;
+                       constraint.mode             = mode_M;
                        tmp_in_constraints[in_size] = constraint;
 
                        ins[in_size]          = expression_to_addr(expr);