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[TableGen] Do not construct string from nullptr

Authored by georgthegreat on Sep 10 2020, 7:40 AM.

Description

[TableGen] Do not construct string from nullptr

While I am trying to forbid such usages systematically in
https://reviews.llvm.org/D79427 / P2166R0 to C++ standard,
this PR fixes this (definitelly incorrect) usage in llvm.

Differential Revision: https://reviews.llvm.org/D87185

Details

Committed
nikicSep 10 2020, 7:42 AM
Differential Revision
D87185: Do not construct string from nullptr
Parents
rG82edd428f185: [flang] Fix check for distinguishable operators/assignments
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