[multiple changes]

2009-04-20  Arnaud Charlet  <charlet@adacore.com>

	* gnat_ugn.texi: Fix typos.

2009-04-20  Robert Dewar  <dewar@adacore.com>

	* debug.adb, gnat1drv.adb, sem_ch13.adb: Add circuitry to
	Validate_Unchecked_Warnings to suppress warnings about size or
	alignment or extra bits if either type involved has pragma Warnings
	(Off) set for the type entity.

From-SVN: r146366

gcc/ada/ChangeLog

@@ -1,3 +1,14 @@
+2009-04-20  Arnaud Charlet  <charlet@adacore.com>
+
+	* gnat_ugn.texi: Fix typos.
+
+2009-04-20  Robert Dewar  <dewar@adacore.com>
+
+	* debug.adb, gnat1drv.adb, sem_ch13.adb: Add circuitry to
+	Validate_Unchecked_Warnings to suppress warnings about size or
+	alignment or extra bits if either type involved has pragma Warnings
+	(Off) set for the type entity.
+
 2009-04-19  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc-interface/trans.c (gigi): Make the special IA-64 descriptor type

gcc/ada/debug.adb

@@ -91,7 +91,7 @@ package body Debug is
    --  dY   Enable configurable run-time mode
    --  dZ   Generate listing showing the contents of the dispatch tables
 
-   --  d.a
+   --  d.a  Force Target_Strict_Alignment mode to True
    --  d.b
    --  d.c  Generate inline concatenation, do not call procedure
    --  d.d
@@ -498,6 +498,10 @@ package body Debug is
    --         - In case of abstract subprograms the text "is abstract" is
    --           added at the end of the line.
 
+   --  d.a  Force Target_Strict_Alignment to True, even on targets where it
+   --       would normally be false. Can be used for testing strict alignment
+   --       circuitry in the compiler.
+
    --  d.c  Generate inline concatenation, instead of calling one of the
    --       System.Concat_n.Str_Concat_n routines in cases where the latter
    --       routines would normally be called.

gcc/ada/gnat1drv.adb

@@ -339,6 +339,12 @@ begin
          List_Representation_Info_Mechanisms := True;
       end if;
 
+      --  Force Target_Strict_Alignment true if debug flag -gnatd.a is set
+
+      if Debug_Flag_Dot_A then
+         Ttypes.Target_Strict_Alignment := True;
+      end if;
+
       --  Disable static allocation of dispatch tables if -gnatd.t or if layout
       --  is enabled. The front end's layout phase currently treats types that
       --  have discriminant-dependent arrays as not being static even when a

gcc/ada/gnat_ugn.texi

@@ -22263,8 +22263,8 @@ headers which is intended to do 95% of the tedious work of generating
 Ada specs from C or C++ header files. Note that this still is a work in
 progress, not designed to generate 100% correct Ada specs.
 
-Note that the code generated is using the Ada 2005 syntax, which makes it
-easier to inteface with other languages than previous versions of Ada.
+The code generated is using the Ada 2005 syntax, which makes it
+easier to interface with other languages than previous versions of Ada.
 
 @menu
 * Running the binding generator::
@@ -22286,8 +22286,8 @@ $ g++ -c -fdump-ada-spec -C /usr/include/time.h
 $ gcc -c -gnat05 *.ads
 @end smallexample
 
-will generate, under GNU/Linux, the following files: @file{bits_time_h.ads},
-@code{bits_types_h.ads}, @code{stddef_h.ads}, @code{time_h.ads} which
+will generate, under GNU/Linux, the following files: @file{time_h.ads},
+@file{bits_time_h.ads}, @file{stddef_h.ads}, @file{bits_types_h.ads} which
 correspond to the files @file{/usr/include/time.h},
 @file{/usr/include/bits/time.h}, etc@dots{}, and will then compile in Ada 2005
 mode these Ada specs.
@@ -22333,7 +22333,7 @@ procedure foo (variable : int);
 @end smallexample
 
 In some cases, the generated bindings will be more complete or more meaningful
-when defining some macros, which you can do via the @option{-D} switch. this
+when defining some macros, which you can do via the @option{-D} switch. This
 is for example the case with @file{Xlib.h} under GNU/Linux:
 
 @smallexample
@@ -22347,7 +22347,7 @@ In other cases, it is not possible to parse a header file in a stand alone
 manner, because other include files need to be included first. In this
 case, the solution is to create a small header file including the needed
 @code{#include} and possible @code{#define} directives. For example, to
-generate Ada bindings for @file{readline/readlin.h}, you need to first
+generate Ada bindings for @file{readline/readline.h}, you need to first
 include @file{stdio.h}, so you can create a file with the following two
 lines in e.g. @file{readline1.h}:
 
@@ -22390,7 +22390,7 @@ Generate Ada spec files for the header files specified on the command line
 only.
 
 @item -C
-@item @option{-C} (@command{gcc})
+@cindex @option{-C} (@command{gcc})
 Extract comments from headers and generate Ada comments in the Ada spec files.
 @end table
 

gcc/ada/sem_ch13.adb

@@ -4476,6 +4476,14 @@ package body Sem_Ch13 is
             if Serious_Errors_Detected = 0
               and then Known_Static_RM_Size (Source)
               and then Known_Static_RM_Size (Target)
+
+              --  Don't do the check if warnings off for either type, note the
+              --  deliberate use of OR here instead of OR ELSE to get the flag
+              --  Warnings_Off_Used set for both types if appropriate.
+
+              and then not (Has_Warnings_Off (Source)
+                              or
+                            Has_Warnings_Off (Target))
             then
                Source_Siz := RM_Size (Source);
                Target_Siz := RM_Size (Target);
@@ -4568,6 +4576,20 @@ package body Sem_Ch13 is
                      begin
                         if Source_Align < Target_Align
                           and then not Is_Tagged_Type (D_Source)
+
+                          --  Suppress warning if warnings suppressed on either
+                          --  type or either designated type. Note the use of
+                          --  OR here instead of OR ELSE. That is intentional,
+                          --  we would like to set flag Warnings_Off_Used in
+                          --  all types for which warnings are suppressed.
+
+                          and then not (Has_Warnings_Off (D_Source)
+                                          or
+                                        Has_Warnings_Off (D_Target)
+                                          or
+                                        Has_Warnings_Off (Source)
+                                          or
+                                        Has_Warnings_Off (Target))
                         then
                            Error_Msg_Uint_1 := Target_Align;
                            Error_Msg_Uint_2 := Source_Align;
@@ -4576,12 +4598,9 @@ package body Sem_Ch13 is
                            Error_Msg
                              ("?alignment of & (^) is stricter than " &
                               "alignment of & (^)!", Eloc);
-
-                           if All_Errors_Mode then
-                              Error_Msg
-                                ("\?resulting access value may have invalid " &
-                                 "alignment!", Eloc);
-                           end if;
+                           Error_Msg
+                             ("\?resulting access value may have invalid " &
+                              "alignment!", Eloc);
                         end if;
                      end;
                   end if;