Import LLVM 4.0.0 rc1 including clang and lld to help the current

development effort on OpenBSD/arm64.

1 files changed, 62 insertions, 0 deletions

diff --git a/gnu/llvm/lib/CodeGen/CountingFunctionInserter.cpp b/gnu/llvm/lib/CodeGen/CountingFunctionInserter.cpp
new file mode 100644
index 00000000000..1e46a7a99e7
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+++ b/gnu/llvm/lib/CodeGen/CountingFunctionInserter.cpp
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+//===- CountingFunctionInserter.cpp - Insert mcount-like function calls ---===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Insert calls to counter functions, such as mcount, intended to be called
+// once per function, at the beginning of each function.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Analysis/GlobalsModRef.h"
+#include "llvm/CodeGen/Passes.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/Type.h"
+#include "llvm/Pass.h"
+using namespace llvm;
+
+namespace {
+  struct CountingFunctionInserter : public FunctionPass {
+    static char ID; // Pass identification, replacement for typeid
+    CountingFunctionInserter() : FunctionPass(ID) {
+      initializeCountingFunctionInserterPass(*PassRegistry::getPassRegistry());
+    }
+    
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
+      AU.addPreserved<GlobalsAAWrapperPass>();
+    }
+
+    bool runOnFunction(Function &F) override {
+      std::string CountingFunctionName =
+        F.getFnAttribute("counting-function").getValueAsString();
+      if (CountingFunctionName.empty())
+        return false;
+
+      Type *VoidTy = Type::getVoidTy(F.getContext());
+      Constant *CountingFn =
+        F.getParent()->getOrInsertFunction(CountingFunctionName,
+                                           VoidTy, nullptr);
+      CallInst::Create(CountingFn, "", &*F.begin()->getFirstInsertionPt());
+      return true;
+    }
+  };
+  
+  char CountingFunctionInserter::ID = 0;
+}
+
+INITIALIZE_PASS(CountingFunctionInserter, "cfinserter", 
+                "Inserts calls to mcount-like functions", false, false)
+
+//===----------------------------------------------------------------------===//
+//
+// CountingFunctionInserter - Give any unnamed non-void instructions "tmp" names.
+//
+FunctionPass *llvm::createCountingFunctionInserterPass() {
+  return new CountingFunctionInserter();
+}