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223e47cc LB |
1 | //===- InstructionNamer.cpp - Give anonymous instructions names -----------===// |
2 | // | |
3 | // The LLVM Compiler Infrastructure | |
4 | // | |
5 | // This file is distributed under the University of Illinois Open Source | |
6 | // License. See LICENSE.TXT for details. | |
7 | // | |
8 | //===----------------------------------------------------------------------===// | |
9 | // | |
10 | // This is a little utility pass that gives instructions names, this is mostly | |
11 | // useful when diffing the effect of an optimization because deleting an | |
12 | // unnamed instruction can change all other instruction numbering, making the | |
13 | // diff very noisy. | |
14 | // | |
15 | //===----------------------------------------------------------------------===// | |
16 | ||
17 | #include "llvm/Transforms/Scalar.h" | |
970d7e83 LB |
18 | #include "llvm/IR/Function.h" |
19 | #include "llvm/IR/Type.h" | |
223e47cc | 20 | #include "llvm/Pass.h" |
223e47cc LB |
21 | using namespace llvm; |
22 | ||
23 | namespace { | |
24 | struct InstNamer : public FunctionPass { | |
25 | static char ID; // Pass identification, replacement for typeid | |
26 | InstNamer() : FunctionPass(ID) { | |
27 | initializeInstNamerPass(*PassRegistry::getPassRegistry()); | |
28 | } | |
29 | ||
30 | void getAnalysisUsage(AnalysisUsage &Info) const { | |
31 | Info.setPreservesAll(); | |
32 | } | |
33 | ||
34 | bool runOnFunction(Function &F) { | |
35 | for (Function::arg_iterator AI = F.arg_begin(), AE = F.arg_end(); | |
36 | AI != AE; ++AI) | |
37 | if (!AI->hasName() && !AI->getType()->isVoidTy()) | |
38 | AI->setName("arg"); | |
39 | ||
40 | for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) { | |
41 | if (!BB->hasName()) | |
42 | BB->setName("bb"); | |
43 | ||
44 | for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) | |
45 | if (!I->hasName() && !I->getType()->isVoidTy()) | |
46 | I->setName("tmp"); | |
47 | } | |
48 | return true; | |
49 | } | |
50 | }; | |
51 | ||
52 | char InstNamer::ID = 0; | |
53 | } | |
54 | ||
55 | INITIALIZE_PASS(InstNamer, "instnamer", | |
56 | "Assign names to anonymous instructions", false, false) | |
57 | char &llvm::InstructionNamerID = InstNamer::ID; | |
58 | //===----------------------------------------------------------------------===// | |
59 | // | |
60 | // InstructionNamer - Give any unnamed non-void instructions "tmp" names. | |
61 | // | |
62 | FunctionPass *llvm::createInstructionNamerPass() { | |
63 | return new InstNamer(); | |
64 | } |