Stanislav Mekhanoshin 5fa289f0d8 [AMDGPU] Narrow lshl from 64 to 32 bit if possible ...

Turn expensive 64 bit shift into 32 bit if shift does not overflow int:
shl (ext x) => zext (shl x)

Differential Revision: https://reviews.llvm.org/D33367

llvm-svn: 303569

2017-05-22 16:58:10 +00:00

6.7 KiB

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