Fix from Dave Korn in case a backend does not declare any define_register_constraints

[thirdparty/gcc.git] / gcc / genpreds.c

diff --git a/gcc/genpreds.c b/gcc/genpreds.c
index a1232e9573f01c7285e2c6b3e26b6df94d3b8830..5a4e249ceb447c19559c07cbceeec6bbc23f4248 100644 (file)
--- a/gcc/genpreds.c
+++ b/gcc/genpreds.c
@@ -954,6 +954,7 @@ write_enum_constraint_num (void)
 {
   struct constraint_data *c;
 
+  fputs ("#define CONSTRAINT_NUM_DEFINED_P 1\n", stdout);
   fputs ("enum constraint_num\n"
         "{\n"
         "  CONSTRAINT__UNKNOWN = 0", stdout);
@@ -1279,9 +1280,13 @@ write_tm_preds_h (void)
        puts ("extern enum reg_class regclass_for_constraint "
              "(enum constraint_num);\n"
              "#define REG_CLASS_FROM_CONSTRAINT(c_,s_) \\\n"
-             "    regclass_for_constraint (lookup_constraint (s_))\n");
+             "    regclass_for_constraint (lookup_constraint (s_))\n"
+             "#define REG_CLASS_FOR_CONSTRAINT(x_) \\\n"
+             "    regclass_for_constraint (x_)\n");
       else
-       puts ("#define REG_CLASS_FROM_CONSTRAINT(c_,s_) NO_REGS");
+       puts ("#define REG_CLASS_FROM_CONSTRAINT(c_,s_) NO_REGS\n"
+             "#define REG_CLASS_FOR_CONSTRAINT(x_) \\\n"
+             "    NO_REGS\n");
       if (have_const_int_constraints)
        puts ("extern bool insn_const_int_ok_for_constraint "
              "(HOST_WIDE_INT, enum constraint_num);\n"