Shoaib Meenai 7a4b27609d [lld] Add test suite mode for running LLD main twice ...

LLD_IN_TEST determines how many times each port's `main` function is
run in each LLD process, and setting LLD_IN_TEST=2 (or higher) is useful
for checking if we're cleaning up and resetting global state correctly.
Add a test suite parameter to enable this easily. There's work in
progress to remove global state (e.g. D108850), but this seems useful in
the interim.

Reviewed By: rnk

Differential Revision: https://reviews.llvm.org/D112898

2021-11-01 14:26:54 -07:00

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