re PR c++/89507 (bogus "size of array exceeds maximum object size")

	PR c++/89507
	* tree.c (valid_constant_size_p): Deal with size INTEGER_CSTs
	with types other than sizetype/ssizetype.

	* g++.dg/other/new2.C: New test.

From-SVN: r269233

1 files changed, 7 insertions, 10 deletions

diff --git a/gcc/tree.c b/gcc/tree.c
index 30e01df..0c70bb9 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -7533,19 +7533,16 @@ valid_constant_size_p (const_tree size, cst_size_error *perr /* = NULL */)
       return false;
     }
 
-  tree type = TREE_TYPE (size);
-  if (TYPE_UNSIGNED (type))
+  if (tree_int_cst_sgn (size) < 0)
     {
-      if (!tree_fits_uhwi_p (size)
-	  || tree_int_cst_sign_bit (size))
-	{
-	  *perr = cst_size_too_big;
-	  return false;
-	}
+      *perr = cst_size_negative;
+      return false;
     }
-  else if (tree_int_cst_sign_bit (size))
+  if (!tree_fits_uhwi_p (size)
+      || (wi::to_widest (TYPE_MAX_VALUE (sizetype))
+	  < wi::to_widest (size) * 2))
     {
-      *perr = cst_size_negative;
+      *perr = cst_size_too_big;
       return false;
     }