[PATCH] D34868: [Driver] Add -fdiagnostics-hotness-threshold

[Brian Gesiak via Phabricator via cfe-commits]

modocache created this revision.
Herald added a subscriber: fhahn.

Depends on https://reviews.llvm.org/D34867.

Add a Clang frontend option to enable optimization remark hotness
thresholds, which were added to LLVM in https://reviews.llvm.org/D34867.
This prevents diagnostics that do not meet a minimum hotness
threshold from being output. When generating optimization remarks for large
codebases with a ton of cold code paths, this option can be used
to limit the optimization remark output at a reasonable size.
Discussion of this change can be read here:
http://lists.llvm.org/pipermail/llvm-dev/2017-June/114377.html


https://reviews.llvm.org/D34868

Files:
  docs/UsersManual.rst
  include/clang/Basic/DiagnosticDriverKinds.td
  include/clang/Driver/Options.td
  include/clang/Frontend/CodeGenOptions.def
  lib/CodeGen/CodeGenAction.cpp
  lib/Driver/ToolChains/Clang.cpp
  lib/Frontend/CompilerInvocation.cpp
  test/Frontend/Inputs/optimization-remark-with-hotness-sample.proftext
  test/Frontend/optimization-remark-with-hotness.c

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