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fold-const.c (fold_unary): Fold the cast into a BIT_AND_EXPR only for an INTEGER_TYPE.

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* fold-const.c (fold_unary) <CASE_CONVERT>: Fold the cast into
	a BIT_AND_EXPR only for an INTEGER_TYPE.

From-SVN: r135467
This commit is contained in:
Eric Botcazou 2008-05-17 13:06:21 +00:00 • committed by Eric Botcazou
parent 74c11a6c4d
commit 1e17e15ae5
4 changed files with 50 additions and 3 deletions
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6
gcc/ChangeLog
View file

@ -1,3 +1,8 @@
2008-05-17 Eric Botcazou <ebotcazou@adacore.com>
* fold-const.c (fold_unary) <CASE_CONVERT>: Fold the cast into
a BIT_AND_EXPR only for an INTEGER_TYPE.
2008-05-16 David S. Miller <davem@davemloft.net>
* config/sparc/linux.h (NO_PROFILE_COUNTERS): Undef before
@ -23,7 +28,6 @@
(df_simulate_one_insn_backwards): Renamed to df_simulate_one_insn.
(df_simulate_one_insn_forwards): Removed.
2008-05-16 Doug Kwan <dougkwan@google.com>
* real.c (real_to_decimal, real_to_hexadecimal): Distinguish

3
gcc/fold-const.c
View file

@ -7864,8 +7864,7 @@ fold_unary (enum tree_code code, tree type, tree op0)
/* Convert (T)(x & c) into (T)x & (T)c, if c is an integer
constants (if x has signed type, the sign bit cannot be set
in c). This folds extension into the BIT_AND_EXPR. */
if (INTEGRAL_TYPE_P (type)
&& TREE_CODE (type) != BOOLEAN_TYPE
if (TREE_CODE (type) == INTEGER_TYPE
&& TREE_CODE (op0) == BIT_AND_EXPR
&& TREE_CODE (TREE_OPERAND (op0, 1)) == INTEGER_CST)
{

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2008-05-17 Eric Botcazou <ebotcazou@adacore.com>
* gnat.dg/bit_packed_array3.adb: New test.
2008-05-17 Eric Botcazou <ebotcazou@adacore.com>
* gnat.dg/warn4.adb: New test.

40
gcc/testsuite/gnat.dg/bit_packed_array3.adb Normal file
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@ -0,0 +1,40 @@
-- { dg-do run }
-- { dg-options "-O2 -gnatp" }
procedure Bit_Packed_Array3 is
type Bitmap_T is array (1 .. 10) of Boolean;
pragma Pack (Bitmap_T);
type Maps_T is record
M1 : Bitmap_T;
end record;
pragma Pack (Maps_T);
for Maps_T'Size use 10;
pragma Suppress_Initialization (Maps_T);
Tmap : constant Bitmap_T := (others => True);
Fmap : constant Bitmap_T := (others => False);
Amap : constant Bitmap_T :=
(1 => False, 2 => True, 3 => False, 4 => True, 5 => False,
6 => True, 7 => False, 8 => True, 9 => False, 10 => True);
function Some_Maps return Maps_T is
Value : Maps_T := (M1 => Amap);
begin
return Value;
end;
pragma Inline (Some_Maps);
Maps : Maps_T;
begin
Maps := Some_Maps;
for I in Maps.M1'Range loop
if (I mod 2 = 0 and then not Maps.M1 (I))
or else (I mod 2 /= 0 and then Maps.M1 (I))
then
raise Program_Error;
end if;
end loop;
end;