[dev.ssa] cmd/compile: Use movups for xmm->xmm mov
[dev.ssa] cmd/compile: Use movups for xmm->xmm mov

Movups is 1 byte smaller than movapd that we currently use.

Change-Id: I22f771f066529352722a28543535ec43497cb9c5
Reviewed-on: https://go-review.googlesource.com/19938
Reviewed-by: David Chase <ae171625adc8645b8b79b7e405a6da5aba5341e0@google.com>

cloudflare/go,binarycrusader/go,linux-on-ibm-z/go,ImJasonH/go,josharian/go,ganboing/go-esx,vanloswang/go,ganboing/go-esx,christopher-henderson/Go,linux-on-ibm-z/go,momchil-velikov/go,cloudflare/go,cloudflare/go,codestation/go,polyverse-security/go,Samurais/go,nawawi/go,derekmarcotte/go,4ad/go,vsekhar/elastic-go,suncycheng/go,theif519/go,cloudflare/go,polyverse-security/go,derekmarcotte/go,vsekhar/elastic-go,codestation/go,polyverse-security/go,vanloswang/go,momchil-velikov/go,golang/go,vanloswang/go,miolini/go,vsekhar/elastic-go,golang/go,momchil-velikov/go,Samurais/go,nawawi/go,ganboing/go-esx,binarycrusader/go,akutz/go,miolini/go,binarycrusader/go,suncycheng/go,ganboing/go-esx,ganboing/go-esx,akutz/go,ImJasonH/go,vanloswang/go,miolini/go,miolini/go,mwhudson/go,mwhudson/go,codestation/go,Samurais/go,golang/go,Cofyc/go,suncycheng/go,momchil-velikov/go,vanloswang/go,linux-on-ibm-z/go,vsekhar/elastic-go,linux-on-ibm-z/go,vsekhar/elastic-go,4ad/go,mwhudson/go,mwhudson/go,momchil-velikov/go,Cofyc/go,theif519/go,golang/go,ganboing/go-esx,mwhudson/go,suncycheng/go,Samurais/go,4ad/go,akutz/go,mwhudson/go,Cofyc/go,codestation/go,derekmarcotte/go,nawawi/go,CAFxX/go,cloudflare/go,polyverse-security/go,binarycrusader/go,linux-on-ibm-z/go,binarycrusader/go,Samurais/go,miolini/go,Cofyc/go,CAFxX/go,suncycheng/go,4ad/go,theif519/go,goodlang/good,Samurais/go,ImJasonH/go,vanloswang/go,4ad/go,theif519/go,ImJasonH/go,goodlang/good,momchil-velikov/go,suncycheng/go,Samurais/go,derekmarcotte/go,ImJasonH/go,polyverse-security/go,golang/go,binarycrusader/go,josharian/go,josharian/go,golang/go,theif519/go,ImJasonH/go,derekmarcotte/go,akutz/go,CAFxX/go,linux-on-ibm-z/go,cloudflare/go,codestation/go,mwhudson/go,josharian/go,ganboing/go-esx,josharian/go,akutz/go,ganboing/go-esx,nawawi/go,goodlang/good,4ad/go,polyverse-security/go,momchil-velikov/go,linux-on-ibm-z/go,golang/go,ImJasonH/go,CAFxX/go,binarycrusader/go,Cofyc/go,mwhudson/go,miolini/go,codestation/go,4ad/go,akutz/go,golang/go,momchil-velikov/go,akutz/go,Cofyc/go,suncycheng/go,binarycrusader/go,Samurais/go,cloudflare/go,codestation/go,polyverse-security/go,Cofyc/go,derekmarcotte/go,josharian/go,linux-on-ibm-z/go,miolini/go,miolini/go,nawawi/go,goodlang/good,suncycheng/go,nawawi/go,theif519/go,nawawi/go,derekmarcotte/go,4ad/go,goodlang/good,Cofyc/go,nawawi/go,theif519/go,vsekhar/elastic-go,goodlang/good,derekmarcotte/go,goodlang/good,theif519/go,cloudflare/go,vanloswang/go,ImJasonH/go,CAFxX/go,CAFxX/go,polyverse-security/go,CAFxX/go,josharian/go,vsekhar/elastic-go,josharian/go,akutz/go,CAFxX/go,vsekhar/elastic-go,goodlang/good,codestation/go,vanloswang/go