@@ -110,7 +110,33 @@ decimal_to_decnumber (const REAL_VALUE_T
decNumberFromString (dn, "nan", &set);
break;
case rvc_normal:
- gcc_assert (r->decimal);
+ if (!r->decimal)
+ {
+ /* dconst{1,2,m1,half} are used in various places in
+ the middle-end and optimizers, allow them here
+ as an exception by converting them to decimal. */
+ if (memcmp (r, &dconst1, sizeof (*r)) == 0)
+ {
+ decNumberFromString (dn, "1", &set);
+ break;
+ }
+ if (memcmp (r, &dconst2, sizeof (*r)) == 0)
+ {
+ decNumberFromString (dn, "2", &set);
+ break;
+ }
+ if (memcmp (r, &dconstm1, sizeof (*r)) == 0)
+ {
+ decNumberFromString (dn, "-1", &set);
+ break;
+ }
+ if (memcmp (r, &dconsthalf, sizeof (*r)) == 0)
+ {
+ decNumberFromString (dn, "0.5", &set);
+ break;
+ }
+ gcc_unreachable ();
+ }
decimal128ToNumber ((const decimal128 *) r->sig, dn);
break;
default:
@@ -0,0 +1,10 @@
+/* PR debug/48928 */
+/* { dg-do compile } */
+/* { dg-options "-g -O2" } */
+
+_Decimal32
+foo (_Decimal32 x)
+{
+ _Decimal32 y = (x + x) / (9.DF * x);
+ return y;
+}