[PATCH] D35975: AMDGPU: Look through a bitcast user of an out argument

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
Herald added subscribers: t-tye, Anastasia, tpr, dstuttard, yaxunl, nhaehnle, wdng, kzhuravl.

This allows handling of a lot more of the interesting
cases in Blender. Most of the large functions unlikely
to be inlined have this pattern.

      

This is a special case for what clang emits for OpenCL 3
 element vectors. Annoyingly, these are emitted as
<3 x elt>* pointers, but accessed as <4 x elt>* operations.
This also needs to handle cases where a struct containing
 a single vector is used.


https://reviews.llvm.org/D35975

Files:
  lib/Target/AMDGPU/AMDGPURewriteOutArguments.cpp
  test/CodeGen/AMDGPU/rewrite-out-arguments-address-space.ll
  test/CodeGen/AMDGPU/rewrite-out-arguments.ll

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