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| author | mmitchel <mmitchel@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-09-15 00:27:16 +0000 |
|---|---|---|
| committer | mmitchel <mmitchel@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-09-15 00:27:16 +0000 |
| commit | 8cc085df6f7931a68a5bbb6220a4043bf8c8ee1a (patch) | |
| tree | 55191847f19102bcfd738acb455adb684fe3adce /gcc/cp/class.c | |
| parent | 53c4d53d132302c132f436cd181dd65772635e33 (diff) | |
| download | gcc-8cc085df6f7931a68a5bbb6220a4043bf8c8ee1a.tar.gz | |
* class.c (layout_class_type): Make DECL_MODE match TYPE_MODE for
an bit-field whose width exceeds that of its type.
* g++.dg/abi/bitfield11.C: New test.
* g++.dg/abi/bitfield12.C: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@71392 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/cp/class.c')
| -rw-r--r-- | gcc/cp/class.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/gcc/cp/class.c b/gcc/cp/class.c index 582caf4279e..706ebbff678 100644 --- a/gcc/cp/class.c +++ b/gcc/cp/class.c @@ -4759,7 +4759,15 @@ layout_class_type (tree t, tree *virtuals_p) field to the size of its declared type; the rest of the field is effectively invisible. */ DECL_SIZE (field) = TYPE_SIZE (type); - DECL_MODE (field) = TYPE_MODE (type); + /* We must also reset the DECL_MODE of the field. */ + if (abi_version_at_least (2)) + DECL_MODE (field) = TYPE_MODE (type); + else if (warn_abi + && DECL_MODE (field) != TYPE_MODE (type)) + /* Versions of G++ before G++ 3.4 did not reset the + DECL_MODE. */ + warning ("the offset of `%D' may not be ABI-compliant and may " + "change in a future version of GCC", field); } else layout_nonempty_base_or_field (rli, field, NULL_TREE, |