From c61e40d377de73443f80d44900c024459b3631e1 Mon Sep 17 00:00:00 2001 From: Pat Haugen Date: Thu, 26 May 2011 15:09:31 +0000 Subject: [PATCH] rs6000.c (rs6000_register_move_cost): Make LR/CTR moves expensive on Power7 also. * config/rs6000/rs6000.c (rs6000_register_move_cost): Make LR/CTR moves expensive on Power7 also. From-SVN: r174292 --- gcc/ChangeLog | 5 +++++ gcc/config/rs6000/rs6000.c | 7 ++++--- 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 2b8478e8480..e72b14439e0 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2011-05-26 Pat Haugen + + * config/rs6000/rs6000.c (rs6000_register_move_cost): Make LR/CTR + moves expensive on Power7 also. + 2011-05-26 Richard Guenther * fold-const.c (fold_unary_loc): Remove bogus code. diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index 48f387e98b6..d6a12fdbe09 100644 --- a/gcc/config/rs6000/rs6000.c +++ b/gcc/config/rs6000/rs6000.c @@ -26444,9 +26444,10 @@ rs6000_register_move_cost (enum machine_mode mode, else if (from == CR_REGS) ret = 4; - /* Power6 has slower LR/CTR moves so make them more expensive than - memory in order to bias spills to memory .*/ - else if (rs6000_cpu == PROCESSOR_POWER6 + /* For those processors that have slow LR/CTR moves, make them more + expensive than memory in order to bias spills to memory .*/ + else if ((rs6000_cpu == PROCESSOR_POWER6 + || rs6000_cpu == PROCESSOR_POWER7) && reg_classes_intersect_p (from, LINK_OR_CTR_REGS)) ret = 6 * hard_regno_nregs[0][mode]; -- 2.30.2