[ProfileData] Copy CallTargetMaps a bit less. NFCI

Author: d0k

llvm/include/llvm/ProfileData/SampleProf.h

@@ -883,7 +883,7 @@ class FunctionSamples {
   /// Returns the call target map collected at a given location.
   /// Each location is specified by \p LineOffset and \p Discriminator.
   /// If the location is not found in profile, return error.
-  ErrorOr<SampleRecord::CallTargetMap>
+  ErrorOr<const SampleRecord::CallTargetMap &>
   findCallTargetMapAt(uint32_t LineOffset, uint32_t Discriminator) const {
     const auto &ret = BodySamples.find(
         mapIRLocToProfileLoc(LineLocation(LineOffset, Discriminator)));
@@ -894,7 +894,7 @@ class FunctionSamples {
 
   /// Returns the call target map collected at a given location specified by \p
   /// CallSite. If the location is not found in profile, return error.
-  ErrorOr<SampleRecord::CallTargetMap>
+  ErrorOr<const SampleRecord::CallTargetMap &>
   findCallTargetMapAt(const LineLocation &CallSite) const {
     const auto &Ret = BodySamples.find(mapIRLocToProfileLoc(CallSite));
     if (Ret == BodySamples.end())

llvm/include/llvm/Transforms/IPO/ProfiledCallGraph.h

@@ -114,9 +114,8 @@ class ProfiledCallGraph {
           uint64_t CallsiteCount = 0;
           LineLocation Callsite = Callee->getCallSiteLoc();
           if (auto CallTargets = CallerSamples->findCallTargetMapAt(Callsite)) {
-            SampleRecord::CallTargetMap &TargetCounts = CallTargets.get();
-            auto It = TargetCounts.find(CalleeSamples->getFunction());
-            if (It != TargetCounts.end())
+            auto It = CallTargets->find(CalleeSamples->getFunction());
+            if (It != CallTargets->end())
               CallsiteCount = It->second;
           }
           Weight = std::max(CallsiteCount, CalleeEntryCount);

llvm/lib/Target/X86/X86InsertPrefetch.cpp

@@ -69,8 +69,8 @@ using PrefetchHints = SampleRecord::CallTargetMap;
 
 // Return any prefetching hints for the specified MachineInstruction. The hints
 // are returned as pairs (name, delta).
-ErrorOr<PrefetchHints> getPrefetchHints(const FunctionSamples *TopSamples,
-                                        const MachineInstr &MI) {
+ErrorOr<const PrefetchHints &>
+getPrefetchHints(const FunctionSamples *TopSamples, const MachineInstr &MI) {
   if (const auto &Loc = MI.getDebugLoc())
     if (const auto *Samples = TopSamples->findFunctionSamples(Loc))
       return Samples->findCallTargetMapAt(FunctionSamples::getOffset(Loc),
@@ -123,7 +123,7 @@ bool X86InsertPrefetch::findPrefetchInfo(const FunctionSamples *TopSamples,
   };
   static const char *SerializedPrefetchPrefix = "__prefetch";
 
-  const ErrorOr<PrefetchHints> T = getPrefetchHints(TopSamples, MI);
+  auto T = getPrefetchHints(TopSamples, MI);
   if (!T)
     return false;
   int16_t max_index = -1;

llvm/lib/Transforms/IPO/SampleProfile.cpp

@@ -794,10 +794,9 @@ SampleProfileLoader::findIndirectCallFunctionSamples(
     return R;
 
   auto CallSite = FunctionSamples::getCallSiteIdentifier(DIL);
-  auto T = FS->findCallTargetMapAt(CallSite);
   Sum = 0;
-  if (T)
-    for (const auto &T_C : T.get())
+  if (auto T = FS->findCallTargetMapAt(CallSite))
+    for (const auto &T_C : *T)
       Sum += T_C.second;
   if (const FunctionSamplesMap *M = FS->findFunctionSamplesMapAt(CallSite)) {
     if (M->empty())
@@ -1679,7 +1678,8 @@ void SampleProfileLoader::generateMDProfMetadata(Function &F) {
           if (!FS)
             continue;
           auto CallSite = FunctionSamples::getCallSiteIdentifier(DIL);
-          auto T = FS->findCallTargetMapAt(CallSite);
+          ErrorOr<SampleRecord::CallTargetMap> T =
+              FS->findCallTargetMapAt(CallSite);
           if (!T || T.get().empty())
             continue;
           if (FunctionSamples::ProfileIsProbeBased) {
@@ -2261,9 +2261,8 @@ void SampleProfileMatcher::countProfileCallsiteMismatches(
 
     // Compute number of samples in the original profile.
     uint64_t CallsiteSamples = 0;
-    auto CTM = FS.findCallTargetMapAt(Loc);
-    if (CTM) {
-      for (const auto &I : CTM.get())
+    if (auto CTM = FS.findCallTargetMapAt(Loc)) {
+      for (const auto &I : *CTM)
         CallsiteSamples += I.second;
     }
     const auto *FSMap = FS.findFunctionSamplesMapAt(Loc);

llvm/tools/llvm-profgen/CSPreInliner.cpp

@@ -128,9 +128,8 @@ bool CSPreInliner::getInlineCandidates(ProfiledCandidateQueue &CQueue,
     uint64_t CallsiteCount = 0;
     LineLocation Callsite = CalleeNode->getCallSiteLoc();
     if (auto CallTargets = CallerSamples->findCallTargetMapAt(Callsite)) {
-      SampleRecord::CallTargetMap &TargetCounts = CallTargets.get();
-      auto It = TargetCounts.find(CalleeSamples->getFunction());
-      if (It != TargetCounts.end())
+      auto It = CallTargets->find(CalleeSamples->getFunction());
+      if (It != CallTargets->end())
         CallsiteCount = It->second;
     }