Re: GCC internals - Instruction Patterns

[Jeff Law <law at redhat dot com>]

On 10/05/2015 07:56 PM, htio2 wrote:
> I am new to gcc compiler backend. I am currently studying how to the .md file
> to have a understanding.
>
> The thing that I don't understand is:
>
> I understand the standard pattern like movsi and etc, but I can see some
> pattern like movsi_internal, movsi_internal_v850e and etc, my question is
> where in the spec can I find them ? and where are they define ?
Pattern names not mentioned in the internals manual are there primarily 
to make dumps easier to read.  In fact, if the name starts with a "*", 
then its sole purpose is to make debugging dumps easier to read. 
Neither the generic parts of the compiler, nor the target specific parts 
of the compiler can directly refer to those patterns by name.

Jeff