On 26 September 2012 13:11, Ulrich Weigand <uweig...@de.ibm.com> wrote: > ChangeLog: > > * lower-subreg.c (enum classify_move_insn): Rename > SIMPLE_PSEUDO_REG_MOVE to DECOMPOSABLE_SIMPLE_MOVE. > (find_decomposable_subregs): Update. > (decompose_multiword_subregs): Add DECOMPOSE_COPIES parameter. > Only mark pseudo-to-pseudo copies as DECOMPOSABLE_SIMPLE_MOVE > if that parameter is true. > (rest_of_handle_lower_subreg): Call decompose_multiword_subregs > with DECOMPOSE_COPIES false. > (rest_of_handle_lower_subreg2): Call decompose_multiword_subregs > with DECOMPOSE_COPIES true.
This patch seems to have caused a slight regression in ARM register allocation: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58166 Jay.
