From 89be2b1bae2409730f99b4ff5d41d635554a8f6c Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Thu, 9 Jul 2015 20:35:56 +0000 Subject: [PATCH] Adjust variable shift costs for IA MCU We reduce code size for IA MCU by adjusting variable shift costs for IA MCU PR target/66821 * config/i386/i386.c (iamcu_cost): Adjust variable shift costs. From-SVN: r225635 --- gcc/ChangeLog | 5 +++++ gcc/config/i386/i386.c | 2 +- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c05f3dfea27..f86571193dd 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2015-07-09 H.J. Lu + + PR target/66821 + * config/i386/i386.c (iamcu_cost): Adjust variable shift costs. + 2015-07-09 Michael Meissner * config/rs6000/rs6000-protos.h (rs6000_secondary_reload_memory): diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 54ee6f3d4fd..a18c733d211 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -420,7 +420,7 @@ static const struct processor_costs iamcu_cost = { COSTS_N_INSNS (1), /* cost of an add instruction */ COSTS_N_INSNS (1) + 1, /* cost of a lea instruction */ - COSTS_N_INSNS (4), /* variable shift costs */ + COSTS_N_INSNS (1), /* variable shift costs */ COSTS_N_INSNS (1), /* constant shift costs */ {COSTS_N_INSNS (11), /* cost of starting multiply for QI */ COSTS_N_INSNS (11), /* HI */ -- 2.30.2