[PATCH] D99352: [AMDGPU] ds_read_*/ds_write_* operations require strict alignment.

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


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Comment at: llvm/lib/Target/AMDGPU/SIISelLowering.cpp:1435
+      // ds_read/write_b128 require 16-byte alignment on gfx8 and older.
+      bool Aligned = Alignment >= Align(16);
       if (IsFast)
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hsmhsm wrote:
> arsenm wrote:
> > I don't like changing this function to lie and say it doesn't work when it does
> My understanding is that the function allowsMisalignedMemoryAccessesImpl() should check for the strict alignment requirment for ds_read/ds_write operations. I am now further updated this function accordingly.
You are making this stricter than the instructions really allow


Repository:
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CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D99352/new/

https://reviews.llvm.org/D99352