On Wed, Apr 15, 2015 at 9:53 AM, Kugan wrote: > 2015-04-15 Kugan Vivekanandarajah < > > Zhenqiang Chen <> > > PR target/65768 > * cprop.c (try_replace_reg): Check cost of constants before > propagating.
> + > + /* For CONSTANT_P (to), loop2_invariant pass might hoist it out the loop. > + And it can be shared by different references. So skip propagation if > + it makes INSN's rtx cost higher. */ > + So only undo if the insn is inside a loop (i.e. BLOCK_FOR_INSN(insn)->loop_father != NULL) and this is a post-pass_loop2 cprop run? Ciao! Steven
