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| author | Olivier Hainque <hainque@adacore.com> | 2007-09-12 10:49:56 +0000 |
|---|---|---|
| committer | Olivier Hainque <hainque@gcc.gnu.org> | 2007-09-12 10:49:56 +0000 |
| commit | 09528ed9bf63847d9b49758a315737ace1d260f7 (patch) | |
| tree | 5543744f197541b0fb5030e363961717337de155 /gcc/ada | |
| parent | 7ab886543206b714b7e90e447446c0128d7638cb (diff) | |
| download | gcc-09528ed9bf63847d9b49758a315737ace1d260f7.zip gcc-09528ed9bf63847d9b49758a315737ace1d260f7.tar.gz gcc-09528ed9bf63847d9b49758a315737ace1d260f7.tar.bz2 | |
decl.c (gnat_to_gnu_entity): For a subtype with discriminant constraints...
2007-09-12 Olivier Hainque <hainque@adacore.com>
ada/
* decl.c (gnat_to_gnu_entity) <E_Record_Subtype>: For a subtype
with discriminant constraints, generalize the code for BIT_FIELDs
to PACKED fields of constant size and propagate DECL_PACKED.
testsuite/
* gnat.dg/packed_subtype.adb: New test.
From-SVN: r128425
Diffstat (limited to 'gcc/ada')
| -rw-r--r-- | gcc/ada/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/ada/decl.c | 13 |
2 files changed, 15 insertions, 4 deletions
diff --git a/gcc/ada/ChangeLog b/gcc/ada/ChangeLog index 6951351..fca0cd0 100644 --- a/gcc/ada/ChangeLog +++ b/gcc/ada/ChangeLog @@ -1,3 +1,9 @@ +2007-09-12 Olivier Hainque <hainque@adacore.com> + + * decl.c (gnat_to_gnu_entity) <E_Record_Subtype>: For a subtype + with discriminant constraints, generalize the code for BIT_FIELDs + to PACKED fields of constant size and propagate DECL_PACKED. + 2007-09-11 Eric Botcazou <ebotcazou@adacore.com> * decl.c (array_type_has_nonaliased_component): New predicate. diff --git a/gcc/ada/decl.c b/gcc/ada/decl.c index 3d7c849..4b3edce 100644 --- a/gcc/ada/decl.c +++ b/gcc/ada/decl.c @@ -2762,9 +2762,14 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition) gnu_field_type = TREE_TYPE (gnu_old_field); } - /* If this was a bitfield, get the size from the old field. - Also ensure the type can be placed into a bitfield. */ - else if (DECL_BIT_FIELD (gnu_old_field)) + /* If the old field was packed and of constant size, we + have to get the old size here, as it might differ from + what the Etype conveys and the latter might overlap + onto the following field. Try to arrange the type for + possible better packing along the way. */ + else if (DECL_PACKED (gnu_old_field) + && TREE_CODE (DECL_SIZE (gnu_old_field)) + == INTEGER_CST) { gnu_size = DECL_SIZE (gnu_old_field); if (TYPE_MODE (gnu_field_type) == BLKmode @@ -2789,7 +2794,7 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition) gnu_field = create_field_decl (DECL_NAME (gnu_old_field), gnu_field_type, gnu_type, - 0, gnu_size, gnu_new_pos, + DECL_PACKED (gnu_old_field), gnu_size, gnu_new_pos, !DECL_NONADDRESSABLE_P (gnu_old_field)); if (!TREE_CONSTANT (gnu_pos)) |