Fangrui Song 746b5fad5b [profile][test] Add -fuse-ld=bfd to make instrprof-lto-pgogen.c robust
Otherwise if 'ld' is an older system LLD (FreeBSD; or if someone adds 'ld' to
point to an LLD from a different installation) which does not support the
current ModuleSummaryIndex::BitCodeSummaryVersion, the test will fail.

Add lit feature 'binutils_lto'. GNU ld is more common than GNU gold, so
we can just require 'is_binutils_lto_supported' to additionally support GNU ld.

Reviewed By: myhsu

Differential Revision: https://reviews.llvm.org/D84133
2020-07-22 10:16:08 -07:00
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