Don't filter diagnostics written as YAML to the output file

[hfinkel]

Summary

The purpose of the YAML diagnostic output file is to collect information on optimizations performed, or not performed, for later processing by tools that help users (and compiler developers) understand how code was optimized. As such, the diagnostics that appear in the file should not be coupled to what a user might want to see summarized for them as the compiler runs, and in fact, because the user likely does not know what optimization diagnostics their tools might want to use, the user cannot provide a useful filter regardless. As such, we shouldn't filter the diagnostics going to the output file.

[anemet]

I agree with the direction, LGTM!

llvm/trunk/lib/Analysis/OptimizationDiagnosticInfo.cpp

void OptimizationRemarkEmitter::computeHotness(
   if (V)
     OptDiag.setHotness(computeHotness(V));
 }
 
 void OptimizationRemarkEmitter::emit(DiagnosticInfoOptimizationBase &OptDiag) {
   computeHotness(OptDiag);
 
   yaml::Output *Out = F->getContext().getDiagnosticsOutputFile();
-  if (Out && OptDiag.isEnabled()) {
+  if (Out) {
     auto *P = &const_cast<DiagnosticInfoOptimizationBase &>(OptDiag);
     *Out << P;
   }
   // FIXME: now that IsVerbose is part of DI, filtering for this will be moved
   // from here to clang.
   if (!OptDiag.isVerbose() || shouldEmitVerbose())
     F->getContext().diagnose(OptDiag);
 }

llvm/trunk/test/Transforms/Inline/optimization-remarks-yaml.ll

 ; RUN: opt < %s -S -inline -pass-remarks-missed=inline -pass-remarks-with-hotness \
 ; RUN:     -pass-remarks-output=%t 2>&1 | FileCheck %s
 ; RUN: cat %t | FileCheck -check-prefix=YAML %s
+; RUN: opt < %s -S -inline -pass-remarks-with-hotness -pass-remarks-output=%t
+; RUN: cat %t | FileCheck -check-prefix=YAML %s
 
 ; Check the YAML file generated for inliner remarks for this program:
 ;
 ;   1  int foo();
 ;   2  int bar();
 ;   3
 ;   4  int baz() {
 ;   5    return foo() + bar();