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