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[SimplifyCFG] Account for N being null.

Authored by fhahn on Dec 7 2019, 9:22 AM.

Description

[SimplifyCFG] Account for N being null.

Fixes a crash, e.g.

http://lab.llvm.org:8011/builders/clang-with-lto-ubuntu/builds/15119/

Details

Committed
fhahnDec 7 2019, 9:23 AM
Parents
rG5ea611daf9cb: [BPF] Support weak global variables for BTF
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