54 lines · cpp
1//===- StructuralHash.cpp - Function Hash Printing ------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file defines the StructuralHashPrinterPass which is used to show10// the structural hash of all functions in a module and the module itself.11//12//===----------------------------------------------------------------------===//13 14#include "llvm/Analysis/StructuralHash.h"15#include "llvm/IR/Module.h"16#include "llvm/IR/StructuralHash.h"17#include "llvm/Support/Format.h"18 19using namespace llvm;20 21PreservedAnalyses StructuralHashPrinterPass::run(Module &M,22 ModuleAnalysisManager &MAM) {23 OS << "Module Hash: "24 << format("%016" PRIx64,25 StructuralHash(M, Options != StructuralHashOptions::None))26 << "\n";27 for (Function &F : M) {28 if (F.isDeclaration())29 continue;30 if (Options == StructuralHashOptions::CallTargetIgnored) {31 auto IgnoreOp = [&](const Instruction *I, unsigned OpndIdx) {32 return I->getOpcode() == Instruction::Call &&33 isa<Constant>(I->getOperand(OpndIdx));34 };35 auto FuncHashInfo = StructuralHashWithDifferences(F, IgnoreOp);36 OS << "Function " << F.getName()37 << " Hash: " << format("%016" PRIx64, FuncHashInfo.FunctionHash)38 << "\n";39 for (auto &[IndexPair, OpndHash] : *FuncHashInfo.IndexOperandHashMap) {40 auto [InstIndex, OpndIndex] = IndexPair;41 OS << "\tIgnored Operand Hash: " << format("%016" PRIx64, OpndHash)42 << " at (" << InstIndex << "," << OpndIndex << ")\n";43 }44 } else {45 OS << "Function " << F.getName() << " Hash: "46 << format(47 "%016" PRIx64,48 StructuralHash(F, Options == StructuralHashOptions::Detailed))49 << "\n";50 }51 }52 return PreservedAnalyses::all();53}54