[PATCH] D150010: AMDGPU: fold fmed3 of fpext sources to f16 fmed3

[Matt Arsenault via Phabricator via llvm-commits]

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InstCombine already does this for minnum/maxnum. If we
also apply this to fmed3, we don't need to explicitly
use 16-bit fmed3 if we're not sure the target
supports 16-bit instructions yet.


https://reviews.llvm.org/D150010

Files:
  llvm/lib/Target/AMDGPU/AMDGPUInstCombineIntrinsic.cpp
  llvm/test/Transforms/InstCombine/AMDGPU/fmed3.ll

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