search for: regtupl

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2017 Jun 16
2
Wide load/store optimization question
...eclare missing instructions by myself.  I'll try looking into sparc backend, thanks. Also, only after writing this post I found a bunch of built-in transforms. Still trying to understand how to use those. By the way, constraint-wise (alignment), is there any difference between virt regclass and regtuple? Best regards,Petr Отправлено со смартфона Samsung Galaxy. -------- Исходное сообщение --------От: 陳韋任 <chenwj.cs97g at g2.nctu.edu.tw> Дата: 16.06.17 22:03 (GMT+02:00) Кому: tstellar at redhat.com Копия: Peter Bel <upcfrost at gmail.com>, LLVM Developers Mailing List <llvm-dev...
2017 Jun 17
2
Wide load/store optimization question
...tions by myself. > > I'll try looking into sparc backend, thanks. Also, only after writing this post I found a bunch of built-in transforms. Still trying to understand how to use those. > > By the way, constraint-wise (alignment), is there any difference between virt regclass and regtuple? That question makes no sense. - Every virtual register has a register class assigned. - You can construct special register classes that represent register tuples so that when the allocator chooses an entry from that register class it really has choosen a tuple of machine registers (even though i...
2017 Mar 22
3
REG_SEQUENCE use question
Hi all, Can someone please explain me how to use REG_SEQUENCE in tablegen? The arch i'm writing backend for has 32-bit regs, and it has a couple of 64-bit load/store instructions which use two neighboring regs at once, which i'm trying to employ using virtual regs with subs. For example, it I want to move one 64-bit virtual reg to another, I'm trying to use the following pattern: