Question about -ftree-* optimizations in -O1

[Libin Dang]

On 06/17/2016 06:39 AM, Jiaqi Tan wrote:
> Hi,
>
> What does the tree in "-ftree-*" refer to in the following
> optimization flags that are turned on as part of -O1 in gcc? Does the
> tree refer to an internal GCC data structure?

Yes. For further details please see: 
https://gcc.gnu.org/onlinedocs/gccint/Tree-SSA.html

Regards,
lee

>
> -ftree-bit-ccp
> -ftree-builtin-call-dce
> -ftree-ccp
> -ftree-ch
> -ftree-copyrename
> -ftree-dce
> -ftree-dominator-opts
> -ftree-dse
> -ftree-forwprop
> -ftree-fre
> -ftree-phiprop
> -ftree-sra
> -ftree-pta
> -ftree-ter
>
> Thanks!
> Jiaqi Tan
>