cmd/compile/internal/gc: convert return values from int to bool
cmd/compile/internal/gc: convert return values from int to bool

Passes go build -toolexec 'toolstash -cmp' -a std.

Change-Id: I895350987661c1855803d1594dbab16068f8d1bc
Reviewed-on: https://go-review.googlesource.com/14873
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>
Run-TryBot: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

derekmarcotte/go,akutz/go,Endika/go,NunoEdgarGub1/go,theif519/go,Jordanzuo/go,linux-on-ibm-z/go,nawawi/go,beealone/go,jacobsa/go,mwhudson/go,joshsammut/go,Cofyc/go,CAFxX/go,xiuzhifu/go,gdey/go,yasarkunduz/go,golang/go,roth1002/go,NunoEdgarGub1/go,samanalysis/go,jacobsa/go,theif519/go,linux-on-ibm-z/go,beealone/go,jacobsa/go,vanloswang/go,miolini/go,polyverse-security/go,Samurais/go,Endika/go,suncycheng/go,odeke-em/go,ganboing/go-esx,jacobsa/go,derekmarcotte/go,rachtsingh/gogojuice,odeke-em/go,kim-racktop/go,vanloswang/go,malvira/go,Cofyc/go,josharian/go,codestation/go,alex-zhang/go,nawawi/go,jonasi/go,b54898533/go,malvira/go,cyberroadie/go,jacobsa/go,yasarkunduz/go,CAFxX/go,deft-code/go,alex-zhang/go,jonasi/go,josharian/go,xiuzhifu/go,b54898533/go,suncycheng/go,joshsammut/go,malvira/go,codestation/go,Jordanzuo/go,linux-on-ibm-z/go,xiuzhifu/go,polyverse-security/go,rachtsingh/gogojuice,xiuzhifu/go,momchil-velikov/go,vsekhar/elastic-go,linux-on-ibm-z/go,binarycrusader/go,polyverse-security/go,derekmarcotte/go,binarycrusader/go,malvira/go,likesea/go,codestation/go,Cofyc/go,vsekhar/elastic-go,odeke-em/go,codestation/go,fjballest/golang,jdhenke/go,miolini/go,4ad/go,NunoEdgarGub1/go,nawawi/go,jonasi/go,NunoEdgarGub1/go,likesea/go,jonasi/go,cloudflare/go,jacobsa/go,alex-zhang/go,derekmarcotte/go,sndnvaps/go,mwhudson/go,jdhenke/go,ImJasonH/go,polyverse-security/go,Samurais/go,sndnvaps/go,NunoEdgarGub1/go,polyverse-security/go,odeke-em/go,dterei/go,kim-racktop/go,goodlang/good,CAFxX/go,theif519/go,kim-racktop/go,Jordanzuo/go,roth1002/go,roth1002/go,mwhudson/go,vsekhar/elastic-go,Endika/go,deft-code/go,mwhudson/go,gdey/go,miolini/go,dterei/go,cloudflare/go,derekmarcotte/go,christopher-henderson/Go,yasarkunduz/go,codestation/go,fjballest/golang,b54898533/go,cloudflare/go,roth1002/go,Cofyc/go,NunoEdgarGub1/go,vanloswang/go,jdhenke/go,b54898533/go,cyberroadie/go,Samurais/go,goodlang/good,cyberroadie/go,cyberroadie/go,fjballest/golang,polyverse-security/go,linux-on-ibm-z/go,momchil-velikov/go,beealone/go,joshsammut/go,akutz/go,goodlang/good,dterei/go,kim-racktop/go,codestation/go,deft-code/go,jacobsa/go,4ad/go,goodlang/good,vsekhar/elastic-go,joshsammut/go,likesea/go,deft-code/go,sndnvaps/go,codestation/go,rachtsingh/gogojuice,ganboing/go-esx,akutz/go,suncycheng/go,Samurais/go,odeke-em/go,deft-code/go,golang/go,4ad/go,NunoEdgarGub1/go,kim-racktop/go,dterei/go,goodlang/good,binarycrusader/go,samanalysis/go,derekmarcotte/go,sndnvaps/go,samanalysis/go,nawawi/go,derekmarcotte/go,linux-on-ibm-z/go,jonasi/go,vanloswang/go,yasarkunduz/go,alex-zhang/go,yasarkunduz/go,binarycrusader/go,xiuzhifu/go,odeke-em/go,Jordanzuo/go,Endika/go,alex-zhang/go,nawawi/go,ImJasonH/go,suncycheng/go,gdey/go,binarycrusader/go,cloudflare/go,ganboing/go-esx,Cofyc/go,Cofyc/go,akutz/go,likesea/go,josharian/go,momchil-velikov/go,likesea/go,alex-zhang/go,fjballest/golang,miolini/go,fjballest/golang,jdhenke/go,sndnvaps/go,CAFxX/go,golang/go,samanalysis/go,gdey/go,cyberroadie/go,ImJasonH/go,beealone/go,dterei/go,rachtsingh/gogojuice,samanalysis/go,akutz/go,josharian/go,theif519/go,Samurais/go,vanloswang/go,b54898533/go,vsekhar/elastic-go,ganboing/go-esx,deft-code/go,gdey/go,ImJasonH/go,Samurais/go,beealone/go,polyverse-security/go,yasarkunduz/go,momchil-velikov/go,goodlang/good,nawawi/go,mwhudson/go,samanalysis/go,Jordanzuo/go,beealone/go,sndnvaps/go,akutz/go,vanloswang/go,theif519/go,kim-racktop/go,ImJasonH/go,fjballest/golang,josharian/go,linux-on-ibm-z/go,odeke-em/go,Endika/go,codestation/go,joshsammut/go,NunoEdgarGub1/go,cyberroadie/go,ganboing/go-esx,CAFxX/go,fjballest/golang,jonasi/go,josharian/go,Samurais/go,malvira/go,fjballest/golang,roth1002/go,dterei/go,polyverse-security/go,nawawi/go,vanloswang/go,jdhenke/go,xiuzhifu/go,beealone/go,golang/go,akutz/go,momchil-velikov/go,goodlang/good,binarycrusader/go,theif519/go,momchil-velikov/go,roth1002/go,miolini/go,suncycheng/go,likesea/go,roth1002/go,likesea/go,cloudflare/go,joshsammut/go,xiuzhifu/go,rachtsingh/gogojuice,binarycrusader/go,deft-code/go,jacobsa/go,gdey/go,b54898533/go,gdey/go,cyberroadie/go,golang/go,ImJasonH/go,Cofyc/go,Endika/go,4ad/go,ganboing/go-esx,momchil-velikov/go,ganboing/go-esx,jdhenke/go,xiuzhifu/go,jdhenke/go,samanalysis/go,theif519/go,b54898533/go,sndnvaps/go,vsekhar/elastic-go,4ad/go,4ad/go,alex-zhang/go,malvira/go,vsekhar/elastic-go,beealone/go,suncycheng/go,dterei/go,mwhudson/go,mwhudson/go,rachtsingh/gogojuice,cloudflare/go,nawawi/go,CAFxX/go,binarycrusader/go,momchil-velikov/go,alex-zhang/go,vsekhar/elastic-go,jonasi/go,miolini/go,Endika/go,Jordanzuo/go,suncycheng/go,CAFxX/go,Jordanzuo/go,ImJasonH/go,roth1002/go,derekmarcotte/go,akutz/go,gdey/go,Jordanzuo/go,4ad/go,golang/go,jonasi/go,Endika/go,suncycheng/go,yasarkunduz/go,kim-racktop/go,rachtsingh/gogojuice,josharian/go,jdhenke/go,kim-racktop/go,Samurais/go,miolini/go,deft-code/go,samanalysis/go,likesea/go,yasarkunduz/go,goodlang/good,malvira/go,joshsammut/go,cloudflare/go,b54898533/go,dterei/go,miolini/go,vanloswang/go,golang/go,linux-on-ibm-z/go,sndnvaps/go,Cofyc/go,joshsammut/go,malvira/go,ganboing/go-esx,cloudflare/go,4ad/go,josharian/go,golang/go,ImJasonH/go,mwhudson/go,rachtsingh/gogojuice,cyberroadie/go,theif519/go,odeke-em/go,CAFxX/go