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Gabriel Hjort Åkerlund 7fb62030d9 [TableGen][GlobalISel] Fix handling of zero_reg
When generating matching tables for GlobalISel, TableGen would output
"::zero_reg" whenever encountering the zero_reg, which in turn would
result in compilation error. This patch fixes that by instead outputting
NoRegister (== 0), which is the same result that TableGen produces when
generating matching tables for ISelDAG.

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D86215
2020-09-18 11:01:11 +02:00
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