[PATCH] PR 62173, re-shuffle insns for RTL loop invariant hoisting

[Matthew Fortune]

> Hi Matthew,
> 
> 2015-04-21 15:24 GMT+01:00 Jiong Wang <jiong.wang@arm.com>:
> 
> >
> > 2015-04-21  Jiong Wang  <jiong.wang@arm.com>
> >
> > gcc/
> >   * loop-invariant.c (find_defs): Enable DF_DU_CHAIN build.
> >   (vfp_const_iv): New hash table.
> >   (expensive_addr_check_p): New boolean.
> >   (init_inv_motion_data): Initialize new variables.>
> >   (free_inv_motion_data): Release hash table.
> >   (create_new_invariant): Set cheap_address to false for iv in
> >   vfp_const_iv table.
> >   (find_invariant_insn): Skip dependencies check for iv in
> vfp_const_iv
> >   table.
> >   (use_for_single_du): New function.
> >   (reshuffle_insn_with_vfp): Likewise.
> >   (find_invariants_bb): Call reshuffle_insn_with_vfp.
> 
> Is it possible for you to test this patch on spec2k6 on MIPS?
> especially 436.cactusADM.
> I am interested in the performance impact on other load/store machines.

I will certainly try and fit it in. It may take me a week to get back to
you though as I'm away on vacation for a few days.

Matthew