[PATCH] D58675: [clang] Adds `-ftime-trace` option to clang that produces Chrome `chrome://tracing` compatible JSON profiling output dumps

[Anton Afanasyev via Phabricator via cfe-commits]

anton-afanasyev marked 2 inline comments as done.
anton-afanasyev added inline comments.


================
Comment at: cfe/trunk/lib/CodeGen/BackendUtil.cpp:1426-1431
   EmitAssemblyHelper AsmHelper(Diags, HeaderOpts, CGOpts, TOpts, LOpts, M);
 
   if (CGOpts.ExperimentalNewPassManager)
     AsmHelper.EmitAssemblyWithNewPassManager(Action, std::move(OS));
   else
     AsmHelper.EmitAssembly(Action, std::move(OS));
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anton-afanasyev wrote:
> lebedev.ri wrote:
> > This isn't covered by any timer; if you look in `BackendUtil.cpp`,
> > `EmitAssemblyHelper` actually has `CodeGenerationTime("codegen", "Code Generation Time")` timer.
> Thanks, I'm to add it.
Hmm, I've figured out this isn't needed: such new timer mostly coincides with "Backend" timer (above). Legacy `Timer CodeGenerationTime(...)` is bad example of doing right timing.


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D58675/new/

https://reviews.llvm.org/D58675