1*67e74705SXin LiThese are tests for instrumentation based profiling. This specifically means 2*67e74705SXin Lithe -fprofile-instr-generate and -fprofile-instr-use driver flags. 3*67e74705SXin Li 4*67e74705SXin LiTests in this directory should usually test both: 5*67e74705SXin Li 6*67e74705SXin Li - the generation of instrumentation (-fprofile-instr-generate), and 7*67e74705SXin Li - the use of profile data from instrumented runs (-fprofile-instr-use). 8*67e74705SXin Li 9*67e74705SXin LiIn order to test -fprofile-instr-use without actually running an instrumented 10*67e74705SXin Liprogram, .profdata files are checked into Inputs/. 11*67e74705SXin Li 12*67e74705SXin LiThe input source files must include a main function such that building with 13*67e74705SXin Li-fprofile-instr-generate and running the resulting program generates the same 14*67e74705SXin Li.profdata file that is consumed by the tests for -fprofile-instr-use. Even 15*67e74705SXin Litests that only check -fprofile-instr-use should include such a main function, 16*67e74705SXin Liso that profile data can be regenerated as the .profdata file format evolves. 17