Commit Graph

4 Commits

Author SHA1 Message Date
Michael Liao 0d092303b4 [amdgpu] Enable use of AA during codegen.
- Add an internal option `-amdgpu-use-aa-in-codegen` to enable or
  disable this feature. By Default, it's enabled.

Differential Revision: https://reviews.llvm.org/D89320
2020-10-27 09:46:23 -04:00
Mirko Brkusanin 5bd1febe21 [AMDGPU] Fix alignment requirements for 96bit and 128bit local loads and stores
Adjust alignment requirements for ds_read/write_b96/b128.
GFX9 and onwards allow misaligned access for reads and writes but only if
SH_MEM_CONFIG.alignment_mode allows it.
UnalignedDSAccess is set on GCN subtargets from GFX9 onward to let us know if we
can relax alignment requirements.
UnalignedAccessMode acts similary to UnalignedBufferAccess for DS instructions
but only from GFX9 onward and is supposed to match alignment_mode. By default
alignment of 4 is required.

Differential Revision: https://reviews.llvm.org/D82788
2020-08-21 12:26:31 +02:00
Matt Arsenault 07f904befb AMDGPU: Correct DS implementation of areLoadsFromSameBasePtr
This was checking the wrong operands for the base register and the
offsets. The indexes are shifted by the number of output registers
from the machine instruction definition, and the chain is moved to the
end.

llvm-svn: 355722
2019-03-08 20:30:50 +00:00
Changpeng Fang 4cabf6d3b5 AMDGPU: Use MachineInstr::mayAlias to replace areMemAccessesTriviallyDisjoint in LoadStoreOptimizer pass.
Summary:
  This is to fix a memory dependence bug in LoadStoreOptimizer.

Reviewers:
  arsenm, rampitec

Differential Revision:
  https://reviews.llvm.org/D58295

llvm-svn: 354295
2019-02-18 23:00:26 +00:00