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- These are tests for instrumentation based profiling. This specifically means
- the -fprofile-instr-generate and -fprofile-instr-use driver flags.
- Tests in this directory should usually test both:
- - the generation of instrumentation (-fprofile-instr-generate), and
- - the use of profile data from instrumented runs (-fprofile-instr-use).
- In order to test -fprofile-instr-use without actually running an instrumented
- program, .profdata files are checked into Inputs/.
- The input source files must include a main function such that building with
- -fprofile-instr-generate and running the resulting program generates the same
- .profdata file that is consumed by the tests for -fprofile-instr-use. Even
- tests that only check -fprofile-instr-use should include such a main function,
- so that profile data can be regenerated as the .profdata file format evolves.
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