| 1 | //===- InstructionNamer.cpp - Give anonymous instructions names -----------===// |
|---|---|
| 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 is a little utility pass that gives instructions names, this is mostly |
| 10 | // useful when diffing the effect of an optimization because deleting an |
| 11 | // unnamed instruction can change all other instruction numbering, making the |
| 12 | // diff very noisy. |
| 13 | // |
| 14 | //===----------------------------------------------------------------------===// |
| 15 | |
| 16 | #include "llvm/Transforms/Utils/InstructionNamer.h" |
| 17 | #include "llvm/IR/Function.h" |
| 18 | #include "llvm/IR/PassManager.h" |
| 19 | #include "llvm/IR/Type.h" |
| 20 | |
| 21 | using namespace llvm; |
| 22 | |
| 23 | namespace { |
| 24 | void nameInstructions(Function &F) { |
| 25 | for (auto &Arg : F.args()) { |
| 26 | if (!Arg.hasName()) |
| 27 | Arg.setName("arg"); |
| 28 | } |
| 29 | |
| 30 | for (BasicBlock &BB : F) { |
| 31 | if (!BB.hasName()) |
| 32 | BB.setName("bb"); |
| 33 | |
| 34 | for (Instruction &I : BB) { |
| 35 | if (!I.hasName() && !I.getType()->isVoidTy()) |
| 36 | I.setName("i"); |
| 37 | } |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | } // namespace |
| 42 | |
| 43 | PreservedAnalyses InstructionNamerPass::run(Function &F, |
| 44 | FunctionAnalysisManager &FAM) { |
| 45 | nameInstructions(F); |
| 46 | return PreservedAnalyses::all(); |
| 47 | } |
| 48 |