re PR middle-end/28131 (FAIL: gcc.c-torture/execute/va-arg-25.c compilation (ICE))

2006-06-22  Roger Sayle  <roger@eyesopen.com>
	    John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>

	PR middle-end/28131
	* expr.c (expand_expr_real_1) <VECTOR_CST>: Check whether the
	call to lang_hooks.types.type_for_mode returned NULL_TREE.

Co-Authored-By: John David Anglin <dave.anglin@nrc-cnrc.gc.ca>
From-SVN: r114923

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 8777019..6574cc8 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2006-06-22  Roger Sayle  <roger@eyesopen.com>
+           John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
+
+       PR middle-end/28131
+       * expr.c (expand_expr_real_1) <VECTOR_CST>: Check whether the
+       call to lang_hooks.types.type_for_mode returned NULL_TREE.
+
 2006-06-23  Ben Elliston  <bje@au.ibm.com>
 
        * dfp.c (decimal_to_decnumber): Do not use decNumberNegate to

diff --git a/gcc/expr.c b/gcc/expr.c
index 562588a..e46e3e7 100644 (file)
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -6945,9 +6945,11 @@ expand_expr_real_1 (tree exp, rtx target, enum machine_mode tmode,
            || GET_MODE_CLASS (mode) == MODE_VECTOR_FLOAT)
          return const_vector_from_tree (exp);
        if (GET_MODE_CLASS (mode) == MODE_INT)
-         tmp = fold_unary (VIEW_CONVERT_EXPR,
-                           lang_hooks.types.type_for_mode (mode, 1),
-                           exp);
+         {
+           tree type_for_mode = lang_hooks.types.type_for_mode (mode, 1);
+           if (type_for_mode)
+             tmp = fold_unary (VIEW_CONVERT_EXPR, type_for_mode, exp);
+         }
        if (!tmp)
          tmp = build_constructor_from_list (type,
                                             TREE_VECTOR_CST_ELTS (exp));