[Clang] Add options -fprofile-filter-files and -fprofile-exclude-files to filter the files to instrument with gcov

Summary:
These options are taking regex separated by colons to filter files.
- if both are empty then all files are instrumented
- if -fprofile-filter-files is empty then all the filenames matching any of the regex from exclude are not instrumented
- if -fprofile-exclude-files is empty then all the filenames matching any of the regex from filter are instrumented
- if both aren't empty then all the filenames which match any of the regex in filter and which don't match all the regex in filter are instrumented
- this patch is a follow-up of https://reviews.llvm.org/D52033

Reviewers: marco-c, vsk

Reviewed By: marco-c, vsk

Subscribers: cfe-commits, sylvestre.ledru

Differential Revision: https://reviews.llvm.org/D52034

llvm-svn: 346642

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 09f656815d4..72b043f28d0 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -64,6 +64,12 @@ Non-comprehensive list of changes in this release
 New Compiler Flags
 ------------------
 
+- ``-fprofile-filter-files=[regexes]`` and ``-fprofile-exclude-files=[regexes]``.
+
+  Clang has now options to filter or exclude some files when
+  instrumenting for gcov-based profiling.
+  See the :doc:`UsersManual` for details.
+
 - ...
 
 Deprecated Compiler Flags