Zachary Turner e87e5c313d [PDB] Fix linking of function symbols and local variables. ... The compiler outputs PROC32_ID symbols into the object files for functions, and these symbols have an embedded type index which, when copied to the PDB, refer to the IPI stream. However, the symbols themselves are also converted into regular symbols (e.g. S_GPROC32_ID -> S_GPROC32), and type indices in the regular symbol records refer to the TPI stream. So this patch applies two fixes to function records. 1. It converts ID symbols to the proper non-ID record type. 2. After remapping the type index from the object file's index space to the PDB file/IPI stream's index space, it then remaps that index to the TPI stream's index space by. Besides functions, during the remapping process we were also discarding symbol record types which we did not recognize. In particular, we were discarding S_BPREL32 records, which is what MSVC uses to describe local variables on the stack. So this patch fixes that as well by copying them to the PDB. Differential Revision: https://reviews.llvm.org/D36426 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@310394 91177308-0d34-0410-b5e6-96231b3b80d8		2017-08-08 18:34:44 +00:00
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