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-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file defines the StructuralHashPrinterPass which is used to show
10// 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(Fmt: "%016" PRIx64,
25 Vals: StructuralHash(M, DetailedHash: 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>(Val: I->getOperand(i: OpndIdx));
34 };
35 auto FuncHashInfo = StructuralHashWithDifferences(F, IgnoreOp);
36 OS << "Function " << F.getName()
37 << " Hash: " << format(Fmt: "%016" PRIx64, Vals: FuncHashInfo.FunctionHash)
38 << "\n";
39 for (auto &[IndexPair, OpndHash] : *FuncHashInfo.IndexOperandHashMap) {
40 auto [InstIndex, OpndIndex] = IndexPair;
41 OS << "\tIgnored Operand Hash: " << format(Fmt: "%016" PRIx64, Vals: OpndHash)
42 << " at (" << InstIndex << "," << OpndIndex << ")\n";
43 }
44 } else {
45 OS << "Function " << F.getName() << " Hash: "
46 << format(
47 Fmt: "%016" PRIx64,
48 Vals: StructuralHash(F, DetailedHash: Options == StructuralHashOptions::Detailed))
49 << "\n";
50 }
51 }
52 return PreservedAnalyses::all();
53}
54