LLVM 20.0.0git
InstructionNamer.cpp
Go to the documentation of this file.
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
17#include "llvm/IR/Function.h"
18#include "llvm/IR/PassManager.h"
19#include "llvm/IR/Type.h"
20
21using namespace llvm;
22
23namespace {
24void 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
45 nameInstructions(F);
47}
#define F(x, y, z)
Definition: MD5.cpp:55
#define I(x, y, z)
Definition: MD5.cpp:58
FunctionAnalysisManager FAM
This header defines various interfaces for pass management in LLVM.
A container for analyses that lazily runs them and caches their results.
Definition: PassManager.h:253
LLVM Basic Block Representation.
Definition: BasicBlock.h:61
A set of analyses that are preserved following a run of a transformation pass.
Definition: Analysis.h:111
static PreservedAnalyses all()
Construct a special preserved set that preserves all passes.
Definition: Analysis.h:117
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
PreservedAnalyses run(Function &, FunctionAnalysisManager &)