[PATCH] D27867: AMDGPU: Add Assert[SZ]Ext during argument load creation

[Matt Arsenault via Phabricator via llvm-commits]

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For i16 zeroext arguments when i16 was a legal type, the
known bits information from the truncate was lost. Insert
a zeroext so the known bits optimizations work with the 32-bit
loads.

      

Fixes code quality regressions vs. SI in min.ll test.


https://reviews.llvm.org/D27867

Files:
  lib/Target/AMDGPU/SIISelLowering.cpp
  lib/Target/AMDGPU/SIISelLowering.h
  test/CodeGen/AMDGPU/min.ll

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