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Subject: [Bug lto/49123] [4.6 Regression] FAIL: gcc.c-torture/execute/pr48973-[12].c
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49123

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.6.1                       |---

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-05-23 13:36:00 UTC ---
(In reply to comment #4)
> A less intrusive variant of the patch might be suitable for backporting
> (it doesn't touch the NULL type argument path) and fixes the testcase for me.
> 
> Index: gcc/tree.c
> ===================================================================
> --- gcc/tree.c  (revision 174066)
> +++ gcc/tree.c  (working copy)
> @@ -1034,9 +1034,9 @@ build_int_cst (tree type, HOST_WIDE_INT
>  {
>    /* Support legacy code.  */
>    if (!type)
> -    type = integer_type_node;
> +    return build_int_cst_wide (integer_type_node, low, low < 0 ? -1 : 0);
> 
> -  return build_int_cst_wide (type, low, low < 0 ? -1 : 0);
> +  return double_int_to_tree (type, shwi_to_double_int (low));
>  }
> 
>  /* Create an INT_CST node with a LOW value in TYPE.  The value is sign
> extended

Alternatively you could call build_int_cst_type instead of build_int_cst in the
spot where FRE? calls it.  Guess that would be even safer to backport.