[Coverage] Move logic to skip decl's into a helper (NFC)

llvm-svn: 275120

Author: vedantk

clang/lib/CodeGen/CodeGenPGO.cpp

@@ -659,12 +659,18 @@ void CodeGenPGO::mapRegionCounters(const Decl *D) {
   FunctionHash = Walker.Hash.finalize();
 }
 
-void CodeGenPGO::emitCounterRegionMapping(const Decl *D) {
+bool CodeGenPGO::skipRegionMappingForDecl(const Decl *D) {
   if (SkipCoverageMapping)
-    return;
-  // Don't map the functions inside the system headers
+    return true;
+
+  // Don't map the functions in system headers.
+  const auto &SM = CGM.getContext().getSourceManager();
   auto Loc = D->getBody()->getLocStart();
-  if (CGM.getContext().getSourceManager().isInSystemHeader(Loc))
+  return SM.isInSystemHeader(Loc);
+}
+
+void CodeGenPGO::emitCounterRegionMapping(const Decl *D) {
+  if (skipRegionMappingForDecl(D))
     return;
 
   std::string CoverageMapping;
@@ -685,11 +691,7 @@ void CodeGenPGO::emitCounterRegionMapping(const Decl *D) {
 void
 CodeGenPGO::emitEmptyCounterMapping(const Decl *D, StringRef Name,
                                     llvm::GlobalValue::LinkageTypes Linkage) {
-  if (SkipCoverageMapping)
-    return;
-  // Don't map the functions inside the system headers
-  auto Loc = D->getBody()->getLocStart();
-  if (CGM.getContext().getSourceManager().isInSystemHeader(Loc))
+  if (skipRegionMappingForDecl(D))
     return;
 
   std::string CoverageMapping;

clang/lib/CodeGen/CodeGenPGO.h

@@ -103,6 +103,7 @@ class CodeGenPGO {
                                llvm::Function *Fn);
   void loadRegionCounts(llvm::IndexedInstrProfReader *PGOReader,
                         bool IsInMainFile);
+  bool skipRegionMappingForDecl(const Decl *D);
   void emitCounterRegionMapping(const Decl *D);
 
 public: