* freeze.adb (Freeze_Entity): Implement Warn_On_Suspicious_Modulus_Value
* gnat_ugn.texi: Add documentation for -gnatw.m/.M
* opt.ads (Warn_On_Suspicious_Modulus_Value): New flag
* sem_warn.adb (Set_Dot_Warning_Flag): Set/reset
Warn_On_Suspicious_Modulus_Value.
* ug_words: Add entries for -gnatw.m/-gnatw.M.
* usage.adb: Add lines for -gnatw.m/.M switches.
* vms_data.ads: Add [NO]SUSPICIOUS_MODULUS for -gnatw.m/w.M
2009-07-13 Javier Miranda <miranda@adacore.com>
* sem_ch6.adb (Check_Synchronized_Overriding): Add missing check before
reading the Is_Interface attribute of the dispatching type.
2009-07-13 Robert Dewar <dewar@adacore.com>
* a-convec.adb: Minor code reorganization (use conditional expressions)
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@149550
138bc75d-0d04-0410-961f-
82ee72b054a4
2009-07-13 Robert Dewar <dewar@adacore.com>
+ * freeze.adb (Freeze_Entity): Implement Warn_On_Suspicious_Modulus_Value
+
+ * gnat_ugn.texi: Add documentation for -gnatw.m/.M
+
+ * opt.ads (Warn_On_Suspicious_Modulus_Value): New flag
+
+ * sem_warn.adb (Set_Dot_Warning_Flag): Set/reset
+ Warn_On_Suspicious_Modulus_Value.
+
+ * ug_words: Add entries for -gnatw.m/-gnatw.M.
+
+ * usage.adb: Add lines for -gnatw.m/.M switches.
+
+ * vms_data.ads: Add [NO]SUSPICIOUS_MODULUS for -gnatw.m/w.M
+
+2009-07-13 Javier Miranda <miranda@adacore.com>
+
+ * sem_ch6.adb (Check_Synchronized_Overriding): Add missing check before
+ reading the Is_Interface attribute of the dispatching type.
+
+2009-07-13 Robert Dewar <dewar@adacore.com>
+
+ * a-convec.adb: Minor code reorganization (use conditional expressions)
+
+2009-07-13 Robert Dewar <dewar@adacore.com>
+
* freeze.adb (Check_Suspicious_Modulus): New procedure.
2009-07-13 Robert Dewar <dewar@adacore.com>
Index := Int'Base (Container.Last) - Int'Base (Count);
- if Index < Index_Type'Pos (Index_Type'First) then
- Container.Last := No_Index;
- else
- Container.Last := Index_Type (Index);
- end if;
+ Container.Last :=
+ (if Index < Index_Type'Pos (Index_Type'First)
+ then No_Index
+ else Index_Type (Index));
end Delete_Last;
-------------
and then Index_Type'Last >= 0
then
CC := UInt (Index_Type'Last) + UInt (-Index_Type'First) + 1;
-
else
CC := UInt (Int (Index_Type'Last) - First + 1);
end if;
and then Index_Type'Last >= 0
then
CC := UInt (Index_Type'Last) + UInt (-Index_Type'First) + 1;
-
else
CC := UInt (Int (Index_Type'Last) - First + 1);
end if;
raise Program_Error with "Position cursor denotes wrong container";
end if;
- if Position.Container = null
- or else Position.Index > Container.Last
- then
- Last := Container.Last;
- else
- Last := Position.Index;
- end if;
+ Last :=
+ (if Position.Container = null or else Position.Index > Container.Last
+ then Container.Last
+ else Position.Index);
for Indx in reverse Index_Type'First .. Last loop
if Container.Elements.EA (Indx) = Item then
Item : Element_Type;
Index : Index_Type := Index_Type'Last) return Extended_Index
is
- Last : Index_Type'Base;
+ Last : constant Index_Type'Base :=
+ Index_Type'Min (Container.Last, Index);
begin
- if Index > Container.Last then
- Last := Container.Last;
- else
- Last := Index;
- end if;
-
for Indx in reverse Index_Type'First .. Last loop
if Container.Elements.EA (Indx) = Item then
return Indx;
elsif Is_Integer_Type (E) then
Adjust_Esize_For_Alignment (E);
- if Is_Modular_Integer_Type (E) then
+ if Is_Modular_Integer_Type (E)
+ and then Warn_On_Suspicious_Modulus_Value
+ then
Check_Suspicious_Modulus (E);
end if;
This switch disables warnings for variables that are assigned or
initialized, but never read.
+@item -gnatw.m
+@emph{Activate warnings on suspicious modulus values.}
+@cindex @option{-gnatw.m} (@command{gcc})
+This switch activates warnings for modulus values that seem suspicious.
+The cases caught are where the size is the same as the modulus (e.g.
+a modulus of 7 with a size of 7 bits), and modulus values of 32 or 64
+with no size clause. The guess in both cases is that 2**x was intended
+rather than x. The default is that these warnings are given.
+
+@item -gnatw.M
+@emph{Disable warnings on suspicious modulus values.}
+@cindex @option{-gnatw.M} (@command{gcc})
+This switch disables warnings for suspicious modulus values.
+
@item -gnatwn
@emph{Set normal warnings mode.}
@cindex @option{-gnatwn} (@command{gcc})
-- clauses that are affected by non-standard bit-order. The default is
-- that this warning is enabled.
+ Warn_On_Suspicious_Modulus_Value : Boolean := True;
+ -- GNAT
+ -- Set to True to generate warnings for suspicious modulus values. The
+ -- default is that this warning is enabled.
+
Warn_On_Unchecked_Conversion : Boolean := True;
-- GNAT
-- Set to True to generate warnings for unchecked conversions that may have
or else not Is_Overloadable (Subp)
or else not Is_Primitive (Subp)
or else not Is_Dispatching_Operation (Subp)
+ or else not Present (Find_Dispatching_Type (Subp))
or else not Is_Interface (Find_Dispatching_Type (Subp))
then
null;
Warn_On_Unrepped_Components := True;
Warn_On_Warnings_Off := True;
+ when 'm' =>
+ Warn_On_Suspicious_Modulus_Value := True;
+
+ when 'M' =>
+ Warn_On_Suspicious_Modulus_Value := False;
+
when 'o' =>
Warn_On_All_Unread_Out_Parameters := True;
-gnatwL ^ /WARNINGS=NOELABORATION
-gnatwm ^ /WARNINGS=MODIFIED_UNREF
-gnatwM ^ /WARNINGS=NOMODIFIED_UNREF
+-gnatw.m ^ /WARNINGS=SUSPICIOUS_MODULUES
+-gnatw.M ^ /WARNINGS=NOSUSPICIOUS_MODULUES
-gnatwn ^ /WARNINGS=NORMAL
-gnatwo ^ /WARNINGS=OVERLAYS
-gnatwO ^ /WARNINGS=NOOVERLAYS
-- --
-- B o d y --
-- --
--- Copyright (C) 1992-2008, Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
"but not read");
Write_Line (" M* turn off warnings for variable assigned " &
"but not read");
+ Write_Line (" .m* turn on warnings for suspicious modulus value");
+ Write_Line (" .M turn off warnings for suspicious modulus value");
Write_Line (" n* normal warning mode (cancels -gnatws/-gnatwe)");
Write_Line (" o* turn on warnings for address clause overlay");
Write_Line (" O turn off warnings for address clause overlay");
"-gnatwm " &
"NOMODIFIED_UNREF " &
"-gnatwM " &
+ "SUSPICIOUS_MODULUS " &
+ "-gnatw.m " &
+ "NOSUSPICIOUS_MODULUS " &
+ "-gnatw.M " &
"NORMAL " &
"-gnatwn " &
"OVERLAYS " &
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