dongjunduo marked an inline comment as done.
dongjunduo added inline comments.


================
Comment at: clang/lib/Driver/Driver.cpp:4702
+
+  // Add or replace -ftime-trace<path>` to the correct one to all clang jobs
+  for (auto &J : C.getJobs()) {
----------------
Whitney wrote:
> dongjunduo wrote:
> > Whitney wrote:
> > > Do you mean Add or replace the modified `-ftime-trace=<path>` to all 
> > > clang jobs?
> > Right
> ic, can you please have the comment updated?
Done at line:4703


================
Comment at: clang/lib/Driver/Driver.cpp:4739
+
+      // replace `-ftime-trace=<path>`
+      auto &JArgs = J.getArguments();
----------------
Whitney wrote:
> dongjunduo wrote:
> > Whitney wrote:
> > > should we also replace `-ftime-trace`?
> > The work before here is to infer the correct path to store the time-trace 
> > file.
> > 
> > After that, the <path> in `-ftime-trace=<path>` should be replaced by the 
> > infered correct path.
> > 
> > We do not need to replace `-ftime-trace` then.
> What happens when `-ftime-trace` is given by the user? Do you have both 
> `-ftime-trace=<path>` and `-ftime-trace` as arguments?
It doesn't matter that either "-ftime-trace" or "-ftime-trace=<path>" or both 
of them are given by the user.

The TimeProfiler is switched on when either "-ftime-trace" and 
"-ftime-trace=<path>"  is specified. Then, 

* If "-ftime-trace=<path>" is specified, the driver use <path>.
* If only "-ftime-trace" is specified, the <path> can be infered, then a new 
option "-ftime-trace=<infered_path>" may be added to the clang.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D131469/new/

https://reviews.llvm.org/D131469

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