[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, 12 insertions, 0 deletions

diff --git a/llvm/tools/opt/opt.cpp b/llvm/tools/opt/opt.cpp
index 06745b0cca0..b4c39e2fca8 100644
--- a/llvm/tools/opt/opt.cpp
+++ b/llvm/tools/opt/opt.cpp
@@ -275,6 +275,12 @@ static cl::opt<std::string>
                     cl::desc("YAML output filename for pass remarks"),
                     cl::value_desc("filename"));
 
+static cl::opt<std::string>
+    RemarksPasses("pass-remarks-filter",
+                  cl::desc("Only record optimization remarks from passes whose "
+                           "names match the given regular expression"),
+                  cl::value_desc("regex"));
+
 cl::opt<PGOKind>
     PGOKindFlag("pgo-kind", cl::init(NoPGO), cl::Hidden,
                 cl::desc("The kind of profile guided optimization"),
@@ -566,6 +572,12 @@ int main(int argc, char **argv) {
     }
     Context.setRemarkStreamer(llvm::make_unique<RemarkStreamer>(
         RemarksFilename, OptRemarkFile->os()));
+
+    if (!RemarksPasses.empty())
+      if (Error E = Context.getRemarkStreamer()->setFilter(RemarksPasses)) {
+        errs() << E << '\n';
+        return 1;
+      }
   }
 
   // Load the input module...