| 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. |
