[PATCH] D87158: [AMDGPU] Fix for folding v2.16 literals.

[Daniil Fukalov via Phabricator via llvm-commits]

dfukalov created this revision.
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It was found some packed immediate operands (e.g. `<half 1.0, half 2.0>`) are
incorrectly processed so one of two packed values were lost.

Introduced new function to check immediate 32-bit operand can be folded.
Converted condition about current op_sel flags value to fall-through.

Fixes: SWDEV-247595


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D87158

Files:
  llvm/lib/Target/AMDGPU/SIFoldOperands.cpp
  llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
  llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.h
  llvm/test/CodeGen/AMDGPU/shrink-add-sub-constant.ll

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