forked from OSchip/llvm-project
00892a5fd0
Summary: As we are adding more types of runtime libraries, it would be better to move the runtime library out of RewriteInstance so that it could grow separately. This also requires splitting the current implementation of Instrumentation.cpp to two separate pieces, one as normal Pass, one as the runtime library. The Instrumentation Pass would pass over the generated data to the runtime library, which will use to emit binary and perform linking. This patch does the following: 1. Turn Instrumentation class into an optimization pass. Register the pass in the pass manager instead of in RewriteInstance. 2. Split all the data that are generated by Instrumentation that's needed by runtime library into a separate data structure called InstrumentationSummary. At the creation of Instrumentation pass, we create an instance of such data structure, which will be moved over to the runtime at the end of the pass. 3. Added a runtime library member to BinaryContext. Set the member at the end of Instrumentation pass. 4. In BinaryEmitter, make BinaryContext to also emit runtime library binary. 5. Created a base class RuntimeLibrary, that defines the interface of a runtime library, along with a few common helper functions. 6. Created InstrumentationRuntimeLibrary which inherits from RuntimeLibrary, that does all the work (mostly copied over) for emit and linking. 7. Added a new directory called RuntimeLibs, and put all the runtime library related files into it. (cherry picked from FBD21694762) |
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