llvm-project

60043897 - [DTLTO] Add DTLTO time traces (and llvm-lto2 time tracing to test) (#171600)

[DTLTO] Add DTLTO time traces (and llvm-lto2 time tracing to test) (#171600) The primary goal of this patch is to add a comprehensive set of DTLTO time traces. I also have implemented support for time traces in llvm-lto2, to allow for adding a test via Lit.