[DiagnosticInfo] Add a diagnostic class for the fallback of ISel.

This will be used to warm when we fallback in GlobalISel.

llvm-svn: 280271

diff --git a/llvm/include/llvm/IR/DiagnosticInfo.h b/llvm/include/llvm/IR/DiagnosticInfo.h
index cbd328c..d8be3d3 100644 (file)
--- a/llvm/include/llvm/IR/DiagnosticInfo.h
+++ b/llvm/include/llvm/IR/DiagnosticInfo.h
@@ -54,6 +54,7 @@ enum DiagnosticKind {
   DK_Linker,
   DK_DebugMetadataVersion,
   DK_DebugMetadataInvalid,
+  DK_ISelFallback,
   DK_SampleProfile,
   DK_OptimizationRemark,
   DK_OptimizationRemarkMissed,
@@ -584,6 +585,25 @@ public:
   }
 };
 
+/// Diagnostic information for ISel fallback path.
+class DiagnosticInfoISelFallback : public DiagnosticInfo {
+  /// The function that is concerned by this diagnostic.
+  const Function &Fn;
+
+public:
+  DiagnosticInfoISelFallback(const Function &Fn,
+                             DiagnosticSeverity Severity = DS_Warning)
+      : DiagnosticInfo(DK_ISelFallback, Severity), Fn(Fn) {}
+
+  const Function &getFunction() const { return Fn; }
+
+  void print(DiagnosticPrinter &DP) const override;
+
+  static bool classof(const DiagnosticInfo *DI) {
+    return DI->getKind() == DK_ISelFallback;
+  }
+};
+
 // Create wrappers for C Binding types (see CBindingWrapping.h).
 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(DiagnosticInfo, LLVMDiagnosticInfoRef)
 

diff --git a/llvm/lib/IR/DiagnosticInfo.cpp b/llvm/lib/IR/DiagnosticInfo.cpp
index ce67be3..7dd4cab 100644 (file)
--- a/llvm/lib/IR/DiagnosticInfo.cpp
+++ b/llvm/lib/IR/DiagnosticInfo.cpp
@@ -262,3 +262,7 @@ void llvm::emitLoopInterleaveWarning(LLVMContext &Ctx, const Function &Fn,
   Ctx.diagnose(DiagnosticInfoOptimizationFailure(
       Fn, DLoc, Twine("loop not interleaved: " + Msg)));
 }
+
+void DiagnosticInfoISelFallback::print(DiagnosticPrinter &DP) const {
+  DP << "Instruction selection used fallback path for " << getFunction();
+}