[CodeView] Add TypeDatabase class.
This creates a centralized class in which to store type records.
It stores types as an array of entries, which matches the
notion of a type stream being a topologically sorted DAG.
Logic to build up such a database was already being used in
CVTypeDumper, so CVTypeDumper is now updated to to read from
a TypeDatabase which is filled out by an earlier visitor in
the pipeline.
Differential Revision: https://reviews.llvm.org/D28486
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291626 91177308-0d34-0410-b5e6-96231b3b80d8
9 files changed