Re: [PATCH/AARCH64] Improve ThunderX2 T99 address cost model

2017-01-23 Thread Richard Earnshaw
On 23/01/17 23:35, Andrew Pinski wrote: > Hi, > On ThunderX 2, the logical shifts that are part of the address cause > a 1 cycle extra and this is not modeled correctly. For induction > variables we don't want to do the shift. When I change the cost for > the shift of the addresses, I get a 12%

[PATCH/AARCH64] Improve ThunderX2 T99 address cost model

2017-01-23 Thread Andrew Pinski
Hi, On ThunderX 2, the logical shifts that are part of the address cause a 1 cycle extra and this is not modeled correctly. For induction variables we don't want to do the shift. When I change the cost for the shift of the addresses, I get a 12% improvement on HMMER; all over benchmarks in SPEC