[Bug rtl-optimization/61605] Potential optimization: Keep unclobbered argument registers live across function calls

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61605

--- Comment #9 from vries at gcc dot gnu.org ---
Author: vries
Date: Fri Oct 17 06:36:35 2014
New Revision: 216364

URL: https://gcc.gnu.org/viewcvs?rev=216364&root=gcc&view=rev
Log:
Handle copy cycles in pass_cprop_hardreg

2014-10-17  Tom de Vries  <tom@codesourcery.com>

    PR rtl-optimization/61605
    * regcprop.c (copyprop_hardreg_forward_1): Add copy_p and noop_p.  Don't
    notice stores for noops.  Don't regard noops as copies.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/regcprop.c