[PATCH] D60772: [AMDGPU] Add optional bounds checking for scratch accesses

[Carl Ritson via Phabricator via llvm-commits]

critson created this revision.
critson added reviewers: arsenm, nhaehnle.
Herald added subscribers: llvm-commits, t-tye, tpr, dstuttard, yaxunl, mgorny, wdng, jvesely, kzhuravl.
Herald added a project: LLVM.

Implement a pass, enabled by -amdgpu-scratch-bounds-checking,
which adds bounds checks to scratch accesses.
When this pass is enabled, out-of-bounds writes have no effect
and out-of-bounds reads return zero.
This is useful for GFX9 where hardware no longer performs
bounds checking on scratch accesses and hence page faults
result for out-of-bounds accesses by generated by shaders.

Change-Id: Id2ee4b1f32e70b6bde2541db755727b6a407721b


Repository:
  rL LLVM

https://reviews.llvm.org/D60772

Files:
  lib/Target/AMDGPU/AMDGPU.h
  lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
  lib/Target/AMDGPU/CMakeLists.txt
  lib/Target/AMDGPU/SIInsertScratchBounds.cpp

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