vendor/llvm-project/llvmorg-11-init-20887-g2e10b7a39b9vendor/llvm-project/master

1 files changed, 87 insertions, 33 deletions

diff --git a/llvm/lib/Transforms/Instrumentation/CGProfile.cpp b/llvm/lib/Transforms/Instrumentation/CGProfile.cpp
index 358abab3cceb..0cc0d9b07387 100644
--- a/llvm/lib/Transforms/Instrumentation/CGProfile.cpp
+++ b/llvm/lib/Transforms/Instrumentation/CGProfile.cpp
@@ -10,12 +10,13 @@
 
 #include "llvm/ADT/MapVector.h"
 #include "llvm/Analysis/BlockFrequencyInfo.h"
+#include "llvm/Analysis/LazyBlockFrequencyInfo.h"
 #include "llvm/Analysis/TargetTransformInfo.h"
-#include "llvm/IR/CallSite.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/Instructions.h"
 #include "llvm/IR/MDBuilder.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/InitializePasses.h"
 #include "llvm/ProfileData/InstrProf.h"
 #include "llvm/Transforms/Instrumentation.h"
 
@@ -23,10 +24,32 @@
 
 using namespace llvm;
 
-PreservedAnalyses CGProfilePass::run(Module &M, ModuleAnalysisManager &MAM) {
+static bool
+addModuleFlags(Module &M,
+               MapVector<std::pair<Function *, Function *>, uint64_t> &Counts) {
+  if (Counts.empty())
+    return false;
+
+  LLVMContext &Context = M.getContext();
+  MDBuilder MDB(Context);
+  std::vector<Metadata *> Nodes;
+
+  for (auto E : Counts) {
+    Metadata *Vals[] = {ValueAsMetadata::get(E.first.first),
+                        ValueAsMetadata::get(E.first.second),
+                        MDB.createConstant(ConstantInt::get(
+                            Type::getInt64Ty(Context), E.second))};
+    Nodes.push_back(MDNode::get(Context, Vals));
+  }
+
+  M.addModuleFlag(Module::Append, "CG Profile", MDNode::get(Context, Nodes));
+  return true;
+}
+
+static bool runCGProfilePass(
+    Module &M, function_ref<BlockFrequencyInfo &(Function &)> GetBFI,
+    function_ref<TargetTransformInfo &(Function &)> GetTTI, bool LazyBFI) {
   MapVector<std::pair<Function *, Function *>, uint64_t> Counts;
-  FunctionAnalysisManager &FAM =
-      MAM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
   InstrProfSymtab Symtab;
   auto UpdateCounts = [&](TargetTransformInfo &TTI, Function *F,
                           Function *CalledF, uint64_t NewCount) {
@@ -36,29 +59,32 @@ PreservedAnalyses CGProfilePass::run(Module &M, ModuleAnalysisManager &MAM) {
     Count = SaturatingAdd(Count, NewCount);
   };
   // Ignore error here.  Indirect calls are ignored if this fails.
-  (void)(bool)Symtab.create(M);
+  (void)(bool) Symtab.create(M);
   for (auto &F : M) {
-    if (F.isDeclaration())
+    // Avoid extra cost of running passes for BFI when the function doesn't have
+    // entry count. Since LazyBlockFrequencyInfoPass only exists in LPM, check
+    // if using LazyBlockFrequencyInfoPass.
+    // TODO: Remove LazyBFI when LazyBlockFrequencyInfoPass is available in NPM.
+    if (F.isDeclaration() || (LazyBFI && !F.getEntryCount()))
       continue;
-    auto &BFI = FAM.getResult<BlockFrequencyAnalysis>(F);
+    auto &BFI = GetBFI(F);
     if (BFI.getEntryFreq() == 0)
       continue;
-    TargetTransformInfo &TTI = FAM.getResult<TargetIRAnalysis>(F);
+    TargetTransformInfo &TTI = GetTTI(F);
     for (auto &BB : F) {
       Optional<uint64_t> BBCount = BFI.getBlockProfileCount(&BB);
       if (!BBCount)
         continue;
       for (auto &I : BB) {
-        CallSite CS(&I);
-        if (!CS)
+        CallBase *CB = dyn_cast<CallBase>(&I);
+        if (!CB)
           continue;
-        if (CS.isIndirectCall()) {
+        if (CB->isIndirectCall()) {
           InstrProfValueData ValueData[8];
           uint32_t ActualNumValueData;
           uint64_t TotalC;
-          if (!getValueProfDataFromInst(*CS.getInstruction(),
-                                        IPVK_IndirectCallTarget, 8, ValueData,
-                                        ActualNumValueData, TotalC))
+          if (!getValueProfDataFromInst(*CB, IPVK_IndirectCallTarget, 8,
+                                        ValueData, ActualNumValueData, TotalC))
             continue;
           for (const auto &VD :
                ArrayRef<InstrProfValueData>(ValueData, ActualNumValueData)) {
@@ -66,33 +92,61 @@ PreservedAnalyses CGProfilePass::run(Module &M, ModuleAnalysisManager &MAM) {
           }
           continue;
         }
-        UpdateCounts(TTI, &F, CS.getCalledFunction(), *BBCount);
+        UpdateCounts(TTI, &F, CB->getCalledFunction(), *BBCount);
       }
     }
   }
 
-  addModuleFlags(M, Counts);
-
-  return PreservedAnalyses::all();
+  return addModuleFlags(M, Counts);
 }
 
-void CGProfilePass::addModuleFlags(
-    Module &M,
-    MapVector<std::pair<Function *, Function *>, uint64_t> &Counts) const {
-  if (Counts.empty())
-    return;
+namespace {
+struct CGProfileLegacyPass final : public ModulePass {
+  static char ID;
+  CGProfileLegacyPass() : ModulePass(ID) {
+    initializeCGProfileLegacyPassPass(*PassRegistry::getPassRegistry());
+  }
 
-  LLVMContext &Context = M.getContext();
-  MDBuilder MDB(Context);
-  std::vector<Metadata *> Nodes;
+  void getAnalysisUsage(AnalysisUsage &AU) const override {
+    AU.setPreservesCFG();
+    AU.addRequired<LazyBlockFrequencyInfoPass>();
+    AU.addRequired<TargetTransformInfoWrapperPass>();
+  }
 
-  for (auto E : Counts) {
-    Metadata *Vals[] = {ValueAsMetadata::get(E.first.first),
-                        ValueAsMetadata::get(E.first.second),
-                        MDB.createConstant(ConstantInt::get(
-                            Type::getInt64Ty(Context), E.second))};
-    Nodes.push_back(MDNode::get(Context, Vals));
+  bool runOnModule(Module &M) override {
+    auto GetBFI = [this](Function &F) -> BlockFrequencyInfo & {
+      return this->getAnalysis<LazyBlockFrequencyInfoPass>(F).getBFI();
+    };
+    auto GetTTI = [this](Function &F) -> TargetTransformInfo & {
+      return this->getAnalysis<TargetTransformInfoWrapperPass>().getTTI(F);
+    };
+
+    return runCGProfilePass(M, GetBFI, GetTTI, true);
   }
+};
 
-  M.addModuleFlag(Module::Append, "CG Profile", MDNode::get(Context, Nodes));
+} // namespace
+
+char CGProfileLegacyPass::ID = 0;
+
+INITIALIZE_PASS(CGProfileLegacyPass, "cg-profile", "Call Graph Profile", false,
+                false)
+
+ModulePass *llvm::createCGProfileLegacyPass() {
+  return new CGProfileLegacyPass();
+}
+
+PreservedAnalyses CGProfilePass::run(Module &M, ModuleAnalysisManager &MAM) {
+  FunctionAnalysisManager &FAM =
+      MAM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
+  auto GetBFI = [&FAM](Function &F) -> BlockFrequencyInfo & {
+    return FAM.getResult<BlockFrequencyAnalysis>(F);
+  };
+  auto GetTTI = [&FAM](Function &F) -> TargetTransformInfo & {
+    return FAM.getResult<TargetIRAnalysis>(F);
+  };
+
+  runCGProfilePass(M, GetBFI, GetTTI, false);
+
+  return PreservedAnalyses::all();
 }