[llvm-branch-commits] [cfe-branch] r369895 - Release notes: -ftime-trace

[Hans Wennborg via llvm-branch-commits]

Author: hans
Date: Mon Aug 26 04:49:09 2019
New Revision: 369895

URL: http://llvm.org/viewvc/llvm-project?rev=369895&view=rev
Log:
Release notes: -ftime-trace

By Aras Pranckevicius!

Modified:
    cfe/branches/release_90/docs/ReleaseNotes.rst

Modified: cfe/branches/release_90/docs/ReleaseNotes.rst
URL: http://llvm.org/viewvc/llvm-project/cfe/branches/release_90/docs/ReleaseNotes.rst?rev=369895&r1=369894&r2=369895&view=diff
==============================================================================
--- cfe/branches/release_90/docs/ReleaseNotes.rst (original)
+++ cfe/branches/release_90/docs/ReleaseNotes.rst Mon Aug 26 04:49:09 2019
@@ -70,7 +70,12 @@ Non-comprehensive list of changes in thi
 New Compiler Flags
 ------------------
 
-- ...
+- ``-ftime-trace`` and ``ftime-trace-granularity=N``
+  Emits flame chart style compilation time report in chrome://tracing and
+  speedscope.app compatible format. A trace .json file is written next to the
+  compiled object file, containing hierarchical time information about frontend
+  activities (file parsing, template instantiation) and backend activities
+  (modules and functions being optimized, optimization passes).
 
 Deprecated Compiler Flags
 -------------------------