[Remarks] Add -foptimization-record-passes to filter remark emission

Currently we have -Rpass for filtering the remarks that are displayed as
diagnostics, but when using -fsave-optimization-record, there is no way
to filter the remarks while generating them.

This adds support for filtering remarks by passes using a regex.
Ex: `clang -fsave-optimization-record -foptimization-record-passes=inline`

will only emit the remarks coming from the pass `inline`.

This adds:

* `-fsave-optimization-record` to the driver
* `-opt-record-passes` to cc1
* `-lto-pass-remarks-filter` to the LTOCodeGenerator
* `--opt-remarks-passes` to lld
* `-pass-remarks-filter` to llc, opt, llvm-lto, llvm-lto2
* `-opt-remarks-passes` to gold-plugin

Differential Revision: https://reviews.llvm.org/D59268

llvm-svn: 355964

1 files changed, 7 insertions, 0 deletions

diff --git a/llvm/tools/llvm-lto2/llvm-lto2.cpp b/llvm/tools/llvm-lto2/llvm-lto2.cpp
index 6cceb8e4cf8..df51921396a 100644
--- a/llvm/tools/llvm-lto2/llvm-lto2.cpp
+++ b/llvm/tools/llvm-lto2/llvm-lto2.cpp
@@ -101,6 +101,12 @@ static cl::opt<bool> OptRemarksWithHotness(
              "Has effect only if -pass-remarks-output is specified."));
 
 static cl::opt<std::string>
+    OptRemarksPasses("pass-remarks-filter",
+                     cl::desc("Only record optimization remarks from passes "
+                              "whose names match the given regular expression"),
+                     cl::value_desc("regex"));
+
+static cl::opt<std::string>
     SamplePGOFile("lto-sample-profile-file",
                   cl::desc("Specify a SamplePGO profile file"));
 
@@ -220,6 +226,7 @@ static int run(int argc, char **argv) {
 
   // Optimization remarks.
   Conf.RemarksFilename = OptRemarksOutput;
+  Conf.RemarksPasses = OptRemarksPasses;
   Conf.RemarksWithHotness = OptRemarksWithHotness;
 
   Conf.SampleProfile = SamplePGOFile;