[PATCH] D82788: AMDGPU: Fix alignment requirements for 96bit and 128bit local loads and stores

Wed Jul 1 07:00:21 PDT 2020

arsenm added inline comments.

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Comment at: llvm/lib/Target/AMDGPU/SIISelLowering.cpp:1377
+      // ds_read/write_b96 require 16-byte alignment. gfx9 and onward has
+      // unaligned access support but windows likes to keep it dword aligned.
+      bool IsGFX9Plus = Subtarget->getGeneration() >= AMDGPUSubtarget::GFX9;
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nhaehnle wrote:
> arsenm wrote:
> > This is a windows driver bug and doesn't deserve mentioning here. We do not know what the host OS is
> I agree that it's a bug, but I find it reasonable to mention it here. I'd change the comment though to specifically call out that this should be considered a bug in the Windows KMD.
It's not specific to this instance though, this belongs with the place where we assume unaligned access for amdhsa

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D82788/new/

https://reviews.llvm.org/D82788