Peter Klausler 73b193aec2 [flang] Allow more concurrently open NEWUNIT= values, with recycling ... Add a header-only implementation of Briggs & Torczon's fast small integer set data structure to flang/include/flang/Common, and use it in the runtime to manage a pool of Fortran unit numbers with recycling. This replaces the bit set previously used for that purpose. The set is initialized on demand with the negations of all the NEWUNIT= unit numbers that can be returned to any kind of integer variable. For programs that require more concurrently open NEWUNIT= unit numbers than the pool can hold, they are now allocated with a non-recycling counter. This allows as many open units as the operating system provides. Many of the top-line comments in flang/unittests/Runtime had the wrong path name. I noticed this while adding a unit test for the fast integer set data structure, and cleaned them up. Differential Revision: https://reviews.llvm.org/D120685		2022-02-28 16:13:22 -08:00
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CMakeLists.txt
FastIntSetTest.cpp