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Diffstat (limited to 'tools/llvm-diff/DiffConsumer.cpp')
| -rw-r--r-- | tools/llvm-diff/DiffConsumer.cpp | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/tools/llvm-diff/DiffConsumer.cpp b/tools/llvm-diff/DiffConsumer.cpp new file mode 100644 index 0000000000000..c23e8fb91a1b7 --- /dev/null +++ b/tools/llvm-diff/DiffConsumer.cpp @@ -0,0 +1,209 @@ +//===-- DiffConsumer.cpp - Difference Consumer ------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This files implements the the LLVM difference Consumer +// +//===----------------------------------------------------------------------===// + +#include "DiffConsumer.h" + +#include "llvm/Module.h" +#include "llvm/Instructions.h" +#include "llvm/Support/ErrorHandling.h" + +using namespace llvm; + +static void ComputeNumbering(Function *F, DenseMap<Value*,unsigned> &Numbering){ + unsigned IN = 0; + + // Arguments get the first numbers. + for (Function::arg_iterator + AI = F->arg_begin(), AE = F->arg_end(); AI != AE; ++AI) + if (!AI->hasName()) + Numbering[&*AI] = IN++; + + // Walk the basic blocks in order. + for (Function::iterator FI = F->begin(), FE = F->end(); FI != FE; ++FI) { + if (!FI->hasName()) + Numbering[&*FI] = IN++; + + // Walk the instructions in order. + for (BasicBlock::iterator BI = FI->begin(), BE = FI->end(); BI != BE; ++BI) + // void instructions don't get numbers. + if (!BI->hasName() && !BI->getType()->isVoidTy()) + Numbering[&*BI] = IN++; + } + + assert(!Numbering.empty() && "asked for numbering but numbering was no-op"); +} + + +void DiffConsumer::printValue(Value *V, bool isL) { + if (V->hasName()) { + out << (isa<GlobalValue>(V) ? '@' : '%') << V->getName(); + return; + } + if (V->getType()->isVoidTy()) { + if (isa<StoreInst>(V)) { + out << "store to "; + printValue(cast<StoreInst>(V)->getPointerOperand(), isL); + } else if (isa<CallInst>(V)) { + out << "call to "; + printValue(cast<CallInst>(V)->getCalledValue(), isL); + } else if (isa<InvokeInst>(V)) { + out << "invoke to "; + printValue(cast<InvokeInst>(V)->getCalledValue(), isL); + } else { + out << *V; + } + return; + } + + unsigned N = contexts.size(); + while (N > 0) { + --N; + DiffContext &ctxt = contexts[N]; + if (!ctxt.IsFunction) continue; + if (isL) { + if (ctxt.LNumbering.empty()) + ComputeNumbering(cast<Function>(ctxt.L), ctxt.LNumbering); + out << '%' << ctxt.LNumbering[V]; + return; + } else { + if (ctxt.RNumbering.empty()) + ComputeNumbering(cast<Function>(ctxt.R), ctxt.RNumbering); + out << '%' << ctxt.RNumbering[V]; + return; + } + } + + out << "<anonymous>"; +} + +void DiffConsumer::header() { + if (contexts.empty()) return; + for (SmallVectorImpl<DiffContext>::iterator + I = contexts.begin(), E = contexts.end(); I != E; ++I) { + if (I->Differences) continue; + if (isa<Function>(I->L)) { + // Extra newline between functions. + if (Differences) out << "\n"; + + Function *L = cast<Function>(I->L); + Function *R = cast<Function>(I->R); + if (L->getName() != R->getName()) + out << "in function " << L->getName() + << " / " << R->getName() << ":\n"; + else + out << "in function " << L->getName() << ":\n"; + } else if (isa<BasicBlock>(I->L)) { + BasicBlock *L = cast<BasicBlock>(I->L); + BasicBlock *R = cast<BasicBlock>(I->R); + if (L->hasName() && R->hasName() && L->getName() == R->getName()) + out << " in block %" << L->getName() << ":\n"; + else { + out << " in block "; + printValue(L, true); + out << " / "; + printValue(R, false); + out << ":\n"; + } + } else if (isa<Instruction>(I->L)) { + out << " in instruction "; + printValue(I->L, true); + out << " / "; + printValue(I->R, false); + out << ":\n"; + } + + I->Differences = true; + } +} + +void DiffConsumer::indent() { + unsigned N = Indent; + while (N--) out << ' '; +} + +bool DiffConsumer::hadDifferences() const { + return Differences; +} + +void DiffConsumer::enterContext(Value *L, Value *R) { + contexts.push_back(DiffContext(L, R)); + Indent += 2; +} + +void DiffConsumer::exitContext() { + Differences |= contexts.back().Differences; + contexts.pop_back(); + Indent -= 2; +} + +void DiffConsumer::log(StringRef text) { + header(); + indent(); + out << text << '\n'; +} + +void DiffConsumer::logf(const LogBuilder &Log) { + header(); + indent(); + + unsigned arg = 0; + + StringRef format = Log.getFormat(); + while (true) { + size_t percent = format.find('%'); + if (percent == StringRef::npos) { + out << format; + break; + } + assert(format[percent] == '%'); + + if (percent > 0) out << format.substr(0, percent); + + switch (format[percent+1]) { + case '%': out << '%'; break; + case 'l': printValue(Log.getArgument(arg++), true); break; + case 'r': printValue(Log.getArgument(arg++), false); break; + default: llvm_unreachable("unknown format character"); + } + + format = format.substr(percent+2); + } + + out << '\n'; +} + +void DiffConsumer::logd(const DiffLogBuilder &Log) { + header(); + + for (unsigned I = 0, E = Log.getNumLines(); I != E; ++I) { + indent(); + switch (Log.getLineKind(I)) { + case DC_match: + out << " "; + Log.getLeft(I)->dump(); + //printValue(Log.getLeft(I), true); + break; + case DC_left: + out << "< "; + Log.getLeft(I)->dump(); + //printValue(Log.getLeft(I), true); + break; + case DC_right: + out << "> "; + Log.getRight(I)->dump(); + //printValue(Log.getRight(I), false); + break; + } + //out << "\n"; + } +} |