Print vectorization analysis when loop hint is specified.

This patch and a relatec clang patch solve the problem of having to explicitly enable analysis when specifying a loop hint pragma to get the diagnostics. Passing AlwasyPrint as the pass name (see below) causes the front-end to print the diagnostic if the user has specified '-Rpass-analysis' without an '=<target-pass>’. Users of loop hints can pass that compiler option without having to specify the pass and they will get diagnostics for only those loops with loop hints.

llvm-svn: 244555

1 files changed, 5 insertions, 2 deletions

diff --git a/llvm/lib/IR/DiagnosticInfo.cpp b/llvm/lib/IR/DiagnosticInfo.cpp
index 3acef9048cc..eab14e69eaa 100644
--- a/llvm/lib/IR/DiagnosticInfo.cpp
+++ b/llvm/lib/IR/DiagnosticInfo.cpp
@@ -91,6 +91,8 @@ int llvm::getNextAvailablePluginDiagnosticKind() {
   return ++PluginKindID;
 }
 
+const char *DiagnosticInfo::AlwaysPrint = "";
+
 DiagnosticInfoInlineAsm::DiagnosticInfoInlineAsm(const Instruction &I,
                                                  const Twine &MsgStr,
                                                  DiagnosticSeverity Severity)
@@ -166,8 +168,9 @@ bool DiagnosticInfoOptimizationRemarkMissed::isEnabled() const {
 }
 
 bool DiagnosticInfoOptimizationRemarkAnalysis::isEnabled() const {
-  return PassRemarksAnalysisOptLoc.Pattern &&
-         PassRemarksAnalysisOptLoc.Pattern->match(getPassName());
+  return getPassName() == DiagnosticInfo::AlwaysPrint ||
+         (PassRemarksAnalysisOptLoc.Pattern &&
+          PassRemarksAnalysisOptLoc.Pattern->match(getPassName()));
 }
 
 void DiagnosticInfoMIRParser::print(DiagnosticPrinter &DP) const {