re PR fortran/91552 (ICE with valid array constructor)

2019-09-02  Steven G. Kargl  <kargl@gc.gnu.org>

	PR fortran/91552
	* array.c (walk_array_constructor): New function.
	(gfc_match_array_constructor): Use it.

2019-09-02  Steven G. Kargl  <kargl@gc.gnu.org>

	PR fortran/91552
	* gfortran.dg/pr91552.f90: New test.

From-SVN: r275322

gcc/fortran/ChangeLog

+2019-09-02  Steven G. Kargl  <kargl@gc.gnu.org>
+
+	PR fortran/91552
+	* array.c (walk_array_constructor): New function.
+	(gfc_match_array_constructor): Use it.
+
 2019-09-01  Paul Thomas  <pault@gcc.gnu.org>
 
 	* array.c (spec_dimen_size): Check for the presence of

gcc/fortran/array.c

@@ -1134,6 +1134,31 @@ done:
 }
 
 
+/* Convert components of an array constructor to the type in ts.  */
+
+static match
+walk_array_constructor (gfc_typespec *ts, gfc_constructor_base head)
+{
+  gfc_constructor *c;
+  gfc_expr *e;
+  match m;
+
+  for (c = gfc_constructor_first (head); c; c = gfc_constructor_next (c))
+    {
+      e = c->expr;
+      if (e->expr_type == EXPR_ARRAY && e->ts.type == BT_UNKNOWN
+	  && !e->ref && e->value.constructor)
+	{
+	  m = walk_array_constructor (ts, e->value.constructor);
+	  if (m == MATCH_ERROR)
+	    return m;
+	}
+      else if (!gfc_convert_type (e, ts, 1) && e->ts.type != BT_UNKNOWN)
+	return MATCH_ERROR;
+  }
+  return MATCH_YES;
+}
+
 /* Match an array constructor.  */
 
 match
@@ -1263,14 +1288,13 @@ done:
 	    }
 	}
 
-      /* Walk the constructor and ensure type conversion for numeric types.  */
+      /* Walk the constructor, and if possible, do type conversion for
+	 numeric types.  */
       if (gfc_numeric_ts (&ts))
 	{
-	  c = gfc_constructor_first (head);
-	  for (; c; c = gfc_constructor_next (c))
-	    if (!gfc_convert_type (c->expr, &ts, 1)
-		&& c->expr->ts.type != BT_UNKNOWN)
-	      return MATCH_ERROR;
+	  m = walk_array_constructor (&ts, head);
+	  if (m == MATCH_ERROR)
+	    return m;
 	}
     }
   else

gcc/testsuite/ChangeLog

+2019-09-02  Steven G. Kargl  <kargl@gc.gnu.org>
+
+	PR fortran/91552
+	* gfortran.dg/pr91552.f90: New test.
+
 2019-09-02  Bernd Edlinger  <bernd.edlinger@hotmail.de>
 
 	PR middle-end/91605

gcc/testsuite/gfortran.dg/pr91552.f90

+! { dg-do run }
+! PR fortran/91552
+! Code contributed by Gerhard Steinmetz.
+program p
+   real :: y(3), z(4)
+   y = 2.0 * [real :: 1, [2], 3]
+   z = 2.0 * [real :: 1, [2, [4]], 3]
+   if (any(y /= [2., 4., 6.])) stop 1
+   if (any(z /= [2., 4., 8., 6.])) stop 2
+end