Check in LLVM r95781.
diff --git a/lib/Analysis/InstCount.cpp b/lib/Analysis/InstCount.cpp
new file mode 100644
index 0000000..bb2cf53
--- /dev/null
+++ b/lib/Analysis/InstCount.cpp
@@ -0,0 +1,85 @@
+//===-- InstCount.cpp - Collects the count of all instructions ------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This pass collects the count of all instructions and reports them
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "instcount"
+#include "llvm/Analysis/Passes.h"
+#include "llvm/Pass.h"
+#include "llvm/Function.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/InstVisitor.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/ADT/Statistic.h"
+using namespace llvm;
+
+STATISTIC(TotalInsts , "Number of instructions (of all types)");
+STATISTIC(TotalBlocks, "Number of basic blocks");
+STATISTIC(TotalFuncs , "Number of non-external functions");
+STATISTIC(TotalMemInst, "Number of memory instructions");
+
+#define HANDLE_INST(N, OPCODE, CLASS) \
+ STATISTIC(Num ## OPCODE ## Inst, "Number of " #OPCODE " insts");
+
+#include "llvm/Instruction.def"
+
+
+namespace {
+ class InstCount : public FunctionPass, public InstVisitor<InstCount> {
+ friend class InstVisitor<InstCount>;
+
+ void visitFunction (Function &F) { ++TotalFuncs; }
+ void visitBasicBlock(BasicBlock &BB) { ++TotalBlocks; }
+
+#define HANDLE_INST(N, OPCODE, CLASS) \
+ void visit##OPCODE(CLASS &) { ++Num##OPCODE##Inst; ++TotalInsts; }
+
+#include "llvm/Instruction.def"
+
+ void visitInstruction(Instruction &I) {
+ errs() << "Instruction Count does not know about " << I;
+ llvm_unreachable(0);
+ }
+ public:
+ static char ID; // Pass identification, replacement for typeid
+ InstCount() : FunctionPass(&ID) {}
+
+ virtual bool runOnFunction(Function &F);
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.setPreservesAll();
+ }
+ virtual void print(raw_ostream &O, const Module *M) const {}
+
+ };
+}
+
+char InstCount::ID = 0;
+static RegisterPass<InstCount>
+X("instcount", "Counts the various types of Instructions", false, true);
+
+FunctionPass *llvm::createInstCountPass() { return new InstCount(); }
+
+// InstCount::run - This is the main Analysis entry point for a
+// function.
+//
+bool InstCount::runOnFunction(Function &F) {
+ unsigned StartMemInsts =
+ NumGetElementPtrInst + NumLoadInst + NumStoreInst + NumCallInst +
+ NumInvokeInst + NumAllocaInst;
+ visit(F);
+ unsigned EndMemInsts =
+ NumGetElementPtrInst + NumLoadInst + NumStoreInst + NumCallInst +
+ NumInvokeInst + NumAllocaInst;
+ TotalMemInst += EndMemInsts-StartMemInsts;
+ return false;
+}