tree 1ca4af745ab30865df0597c2115e552b3b099c54
parent f5e947731acd9f467f3e231602b8cdb2c5df45fe
author peter klausler <pklausler@nvidia.com> 1616088383 -0700
committer Copybara-Service <copybara-worker@google.com> 1616703933 -0700

[flang] Refine symbol sorting

Replace semantics::SymbolSet with alternatives that clarify
whether the set should order its contents by source position
or not.  This matters because positionally-ordered sets must
not be used for Symbols that might be subjected to name
replacement during name resolution, and address-ordered
sets must not be used (without sorting) in circumstances
where the order of their contents affects the output of the
compiler.

All set<> and map<> instances in the compiler that are keyed
by Symbols now have explicit Compare types in their template
instantiations.  Symbol::operator< is no more.

Differential Revision: https://reviews.llvm.org/D98878

GitOrigin-RevId: 0d8331c06be6981da5341bdcbbc6dd867002da08