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Commit d487d640 authored by Stanislav Mekhanoshin's avatar Stanislav Mekhanoshin
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[AMDGPU] fixed underflow in getOccupancyWithNumVGPRs 

The function could return zero if an extreme number or
registers were used. Minimal possible occupancy is 1.

Differential Revision: https://reviews.llvm.org/D67771

llvm-svn: 372350
parent 1796aad5
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