diff options
Diffstat (limited to 'gcc/ada/decl.c')
| -rw-r--r-- | gcc/ada/decl.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/ada/decl.c b/gcc/ada/decl.c index 68ea42b..6e14492 100644 --- a/gcc/ada/decl.c +++ b/gcc/ada/decl.c @@ -5671,7 +5671,13 @@ maybe_pad_type (tree type, tree size, unsigned int align, integral mode, which will be much more efficient. There is no point in doing so if a size is specified unless it is also a small constant size and it is incorrect to do so if we cannot guarantee that the mode - will be naturally aligned since the field must always be addressable. */ + will be naturally aligned since the field must always be addressable. + + ??? This might not always be a win when done for a stand-alone object: + since the nominal and the effective type of the object will now have + different modes, a VIEW_CONVERT_EXPR will be required for converting + between them and it might be hard to overcome afterwards, including + at the RTL level when the stand-alone object is accessed as a whole. */ if (align != 0 && TREE_CODE (type) == RECORD_TYPE && TYPE_MODE (type) == BLKmode |