[EMAIL PROTECTED] (Richard Kenner) writes: > Sorry it took me so long to get to this. > > > You're not showing where this comes from, so it's hard to say. However > > D.1480 is created by the gimplifier, not the Ada front end. There could > > easily be a typing problem in the tree there (e.g., that of the > > subtraction) but I can't tell for sure. > > As it turned out, there was. > > So, after calling sinfo__chars() and subtracting 300000361, the > FE is emitting that range check. AFAICT, the call to > sinfo__chars(e_5) comes from ada/sem_intr.adb:148 > > Nam : constant Name_Id := Chars (E); > > and 'if (D.1480_32 <= 1)' is at line 155: > > I'd also assumed this was where the bogus tree came from, but I was wrong. > The node in question was not made by the Ada front end but by > build_range_check in clearly incorrect code that does the subtraction in the > wrong type. > > This fixes that problem. Are you in a position to check if it fixes the > original issue? > > *** fold-const.c 25 Jun 2005 01:59:57 -0000 1.599 > --- fold-const.c 27 Jun 2005 20:44:56 -0000 > *************** build_range_check (tree type, tree exp, > *** 4027,4034 **** > > if (value != 0 && ! TREE_OVERFLOW (value)) > ! return build_range_check (type, > ! fold_build2 (MINUS_EXPR, etype, exp, low), > ! 1, fold_convert (etype, integer_zero_node), > ! value); > > return 0; > --- 4027,4045 ---- > > if (value != 0 && ! TREE_OVERFLOW (value)) > ! { > ! /* There is no requirement that LOW be within the range of ETYPE > ! if the latter is a subtype. It must, however, be within the base > ! type of ETYPE. So be sure we do the subtraction in that type. */ > ! if (TREE_TYPE (etype)) > ! { > ! etype = TREE_TYPE (etype); > ! value = fold_convert (etype, value); > ! } > ! > ! return build_range_check (type, > ! fold_build2 (MINUS_EXPR, etype, exp, low), > ! 1, fold_convert (etype, integer_zero_node), ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
RTH has been suggesting to use build_int_cst (etype, 0) instead. > ! value); > ! } > > return 0; > -- Thanks, Jim http://www.csclub.uwaterloo.ca/~ja2morri/ http://phython.blogspot.com http://open.nit.ca/wiki/?page=jim