Commit Graph

3 Commits

Author SHA1 Message Date
Jonas Paulsson 611b533f1d [SchedModel] Fix for read advance cycles with implicit pseudo operands.
The SchedModel allows the addition of ReadAdvances to express that certain
operands of the instructions are needed at a later point than the others.

RegAlloc may add pseudo operands that are not part of the instruction
descriptor, and therefore cannot have any read advance entries. This meant
that in some cases the desired read advance was nullified by such a pseudo
operand, which still had the original latency.

This patch fixes this by making sure that such pseudo operands get a zero
latency during DAG construction.

Review: Matthias Braun, Ulrich Weigand.
https://reviews.llvm.org/D49671

llvm-svn: 345606
2018-10-30 15:04:40 +00:00
Evandro Menezes 14ba3d7730 [CodeGen] Add dependency printer
Add SDep printer to make debugging sessions more productive.

Differential revision: https://reviews.llvm.org/D35144

llvm-svn: 307799
2017-07-12 15:30:59 +00:00
Javed Absar 4ae7e81233 [ARM] Cortex-A57 scheduling model for ARM backend (AArch32)
This patch implements the Cortex-A57 scheduling model.
The main code is in ARMScheduleA57.td, ARMScheduleA57WriteRes.td.
Small changes in cpp,.h files to support required scheduling predicates.

Scheduling model implemented according to:
 http://infocenter.arm.com/help/topic/com.arm.doc.uan0015b/Cortex_A57_Software_Optimization_Guide_external.pdf.

Patch by : Andrew Zhogin (submitted on his behalf, as requested).
Rewiewed by: Renato Golin, Diana Picus, Javed Absar, Kristof Beyls.
Differential Revision: https://reviews.llvm.org/D28152

llvm-svn: 304530
2017-06-02 08:53:19 +00:00