MOVE_BY_PIECES_P is used by rtl optimizers to determine if a chunk of memory is
being moved by pieces. This is wrong when MOVE_BY_PIECES_P returns false
in order to allow a movmem expander emit an efficient move sequence.
There should be a separate optional target macro to tell if a move will be done
in piece, be that via a movmem or via move_by_pieces.
can_move_by_pieces should have an extra argument to specify what is actually
meant.
expand_constructor should use can_move_by_pieces instead of CAN_MOVE_BY_PIECES.
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Summary: MOVE_BY_PIECES_P is used by rtl optimizers
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: amylaar at gcc dot gnu dot org
BugsThisDependsOn: 39302
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39350
