1 files changed, 131 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/Transforms/Instrumentation/Instrumentation.cpp b/contrib/llvm-project/llvm/lib/Transforms/Instrumentation/Instrumentation.cpp
new file mode 100644
index 000000000000..cfdf3cad97f7
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/Transforms/Instrumentation/Instrumentation.cpp
@@ -0,0 +1,131 @@
+//===-- Instrumentation.cpp - TransformUtils Infrastructure ---------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the common initialization infrastructure for the
+// Instrumentation library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Transforms/Instrumentation.h"
+#include "llvm-c/Initialization.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/IR/IntrinsicInst.h"
+#include "llvm/IR/Module.h"
+#include "llvm/InitializePasses.h"
+#include "llvm/PassRegistry.h"
+
+using namespace llvm;
+
+/// Moves I before IP. Returns new insert point.
+static BasicBlock::iterator moveBeforeInsertPoint(BasicBlock::iterator I, BasicBlock::iterator IP) {
+  // If I is IP, move the insert point down.
+  if (I == IP) {
+    ++IP;
+  } else {
+    // Otherwise, move I before IP and return IP.
+    I->moveBefore(&*IP);
+  }
+  return IP;
+}
+
+/// Instrumentation passes often insert conditional checks into entry blocks.
+/// Call this function before splitting the entry block to move instructions
+/// that must remain in the entry block up before the split point. Static
+/// allocas and llvm.localescape calls, for example, must remain in the entry
+/// block.
+BasicBlock::iterator llvm::PrepareToSplitEntryBlock(BasicBlock &BB,
+                                                    BasicBlock::iterator IP) {
+  assert(&BB.getParent()->getEntryBlock() == &BB);
+  for (auto I = IP, E = BB.end(); I != E; ++I) {
+    bool KeepInEntry = false;
+    if (auto *AI = dyn_cast<AllocaInst>(I)) {
+      if (AI->isStaticAlloca())
+        KeepInEntry = true;
+    } else if (auto *II = dyn_cast<IntrinsicInst>(I)) {
+      if (II->getIntrinsicID() == llvm::Intrinsic::localescape)
+        KeepInEntry = true;
+    }
+    if (KeepInEntry)
+      IP = moveBeforeInsertPoint(I, IP);
+  }
+  return IP;
+}
+
+// Create a constant for Str so that we can pass it to the run-time lib.
+GlobalVariable *llvm::createPrivateGlobalForString(Module &M, StringRef Str,
+                                                   bool AllowMerging,
+                                                   const char *NamePrefix) {
+  Constant *StrConst = ConstantDataArray::getString(M.getContext(), Str);
+  // We use private linkage for module-local strings. If they can be merged
+  // with another one, we set the unnamed_addr attribute.
+  GlobalVariable *GV =
+      new GlobalVariable(M, StrConst->getType(), true,
+                         GlobalValue::PrivateLinkage, StrConst, NamePrefix);
+  if (AllowMerging)
+    GV->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
+  GV->setAlignment(Align(1)); // Strings may not be merged w/o setting
+                              // alignment explicitly.
+  return GV;
+}
+
+Comdat *llvm::GetOrCreateFunctionComdat(Function &F, Triple &T,
+                                        const std::string &ModuleId) {
+  if (auto Comdat = F.getComdat()) return Comdat;
+  assert(F.hasName());
+  Module *M = F.getParent();
+  std::string Name = std::string(F.getName());
+
+  // Make a unique comdat name for internal linkage things on ELF. On COFF, the
+  // name of the comdat group identifies the leader symbol of the comdat group.
+  // The linkage of the leader symbol is considered during comdat resolution,
+  // and internal symbols with the same name from different objects will not be
+  // merged.
+  if (T.isOSBinFormatELF() && F.hasLocalLinkage()) {
+    if (ModuleId.empty())
+      return nullptr;
+    Name += ModuleId;
+  }
+
+  // Make a new comdat for the function. Use the "no duplicates" selection kind
+  // for non-weak symbols if the object file format supports it.
+  Comdat *C = M->getOrInsertComdat(Name);
+  if (T.isOSBinFormatCOFF() && !F.isWeakForLinker())
+    C->setSelectionKind(Comdat::NoDuplicates);
+  F.setComdat(C);
+  return C;
+}
+
+/// initializeInstrumentation - Initialize all passes in the TransformUtils
+/// library.
+void llvm::initializeInstrumentation(PassRegistry &Registry) {
+  initializeAddressSanitizerLegacyPassPass(Registry);
+  initializeModuleAddressSanitizerLegacyPassPass(Registry);
+  initializeMemProfilerLegacyPassPass(Registry);
+  initializeModuleMemProfilerLegacyPassPass(Registry);
+  initializeBoundsCheckingLegacyPassPass(Registry);
+  initializeControlHeightReductionLegacyPassPass(Registry);
+  initializeGCOVProfilerLegacyPassPass(Registry);
+  initializePGOInstrumentationGenLegacyPassPass(Registry);
+  initializePGOInstrumentationUseLegacyPassPass(Registry);
+  initializePGOIndirectCallPromotionLegacyPassPass(Registry);
+  initializePGOMemOPSizeOptLegacyPassPass(Registry);
+  initializeCGProfileLegacyPassPass(Registry);
+  initializeInstrOrderFileLegacyPassPass(Registry);
+  initializeInstrProfilingLegacyPassPass(Registry);
+  initializeMemorySanitizerLegacyPassPass(Registry);
+  initializeHWAddressSanitizerLegacyPassPass(Registry);
+  initializeThreadSanitizerLegacyPassPass(Registry);
+  initializeModuleSanitizerCoverageLegacyPassPass(Registry);
+  initializeDataFlowSanitizerLegacyPassPass(Registry);
+}
+
+/// LLVMInitializeInstrumentation - C binding for
+/// initializeInstrumentation.
+void LLVMInitializeInstrumentation(LLVMPassRegistryRef R) {
+  initializeInstrumentation(*unwrap(R));
+}