Imported Upstream version 5.18.0.225

Former-commit-id: 10196d987d5fc5564b9d3b33b1fdf13190f4d0b5

external/llvm/lib/Analysis/InstCount.cpp

@@ -0,0 +1,79 @@
+//===-- 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/Statistic.h"
+#include "llvm/Analysis/Passes.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/InstVisitor.h"
+#include "llvm/Pass.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+#define DEBUG_TYPE "instcount"
+
+STATISTIC(TotalInsts , "Number of instructions (of all types)");
+STATISTIC(TotalBlocks, "Number of basic blocks");
+STATISTIC(TotalFuncs , "Number of non-external functions");
+
+#define HANDLE_INST(N, OPCODE, CLASS) \
+  STATISTIC(Num ## OPCODE ## Inst, "Number of " #OPCODE " insts");
+
+#include "llvm/IR/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/IR/Instruction.def"
+
+    void visitInstruction(Instruction &I) {
+      errs() << "Instruction Count does not know about " << I;
+      llvm_unreachable(nullptr);
+    }
+  public:
+    static char ID; // Pass identification, replacement for typeid
+    InstCount() : FunctionPass(ID) {
+      initializeInstCountPass(*PassRegistry::getPassRegistry());
+    }
+
+    bool runOnFunction(Function &F) override;
+
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
+      AU.setPreservesAll();
+    }
+    void print(raw_ostream &O, const Module *M) const override {}
+
+  };
+}
+
+char InstCount::ID = 0;
+INITIALIZE_PASS(InstCount, "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) {
+  visit(F);
+  return false;
+}