diff options
| author | hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-07-09 20:35:56 +0000 |
|---|---|---|
| committer | hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-07-09 20:35:56 +0000 |
| commit | cbcdee0010178d75db0a3ff01f4597cbd52b78ee (patch) | |
| tree | 61de275553353261af02b15f9f3dc51705498159 | |
| parent | d66793efb5aed8267585914b3831046905841ff8 (diff) | |
| download | gcc-cbcdee0010178d75db0a3ff01f4597cbd52b78ee.tar.gz | |
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.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@225635 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/i386/i386.c | 2 |
2 files changed, 6 insertions, 1 deletions
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 <hongjiu.lu@intel.com> + + PR target/66821 + * config/i386/i386.c (iamcu_cost): Adjust variable shift costs. + 2015-07-09 Michael Meissner <meissner@linux.vnet.ibm.com> * 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 */ |