[PATCH] R600: Make sign_extend_inreg legal.

[Matt Arsenault]

On Apr 21, 2014, at 6:40 AM, Tom Stellard <tom at stellard.net> wrote:

> On Thu, Apr 17, 2014 at 10:37:12PM -0700, Matt Arsenault wrote:
>> 
>> On Apr 2, 2014, at 9:59 AM, Tom Stellard <tom at stellard.net> wrote:
>> 
>>> I want to move away from using patterns with INSERT_SUBREG, because
>>> it just adds another case we need to handle in the SIFixSGPRCopies pass.
>>> Can you move this pattern into AMDILISelDAGToDAG.cpp and use REG_SEQUENCE
>>> instead of INSERT_SUBREG + IMPLICIT_DEF.
>> 
>> Now that it handles INSERT_SUBREG anyway, should I go back to using the patterns?
>> 
> 
> What are the advantages of using the patterns?

Less code