[PATCH] D39012: AMDGPU: Merge BUFFER_STORE_DWORD_OFFEN/OFFSET into x2, x4

[Marek Olšák via Phabricator via llvm-commits]

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

Only 56 shaders (out of 48486) are affected.

Totals from affected shaders (changed stats only):
SGPRS: 2420 -> 2460 (1.65 %)
Spilled VGPRs: 94 -> 112 (19.15 %)
Scratch size: 524 -> 528 (0.76 %) dwords per thread
Code Size: 187400 -> 184992 (-1.28 %) bytes

One DiRT Showdown shader spills 6 more VGPRs.
One Grid Autosport shader spills 12 more VGPRs.

The other 54 shaders only have a decrease in code size.
(I'm ignoring the SGPR noise)


https://reviews.llvm.org/D39012

Files:
  lib/Target/AMDGPU/SILoadStoreOptimizer.cpp
  test/CodeGen/AMDGPU/fmul-2-combine-multi-use.ll
  test/CodeGen/AMDGPU/llvm.amdgcn.buffer.store.ll
  test/CodeGen/AMDGPU/merge-stores.ll

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