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//===- BasicBlock.cpp - The BasicBlock class of Sandbox IR ----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/SandboxIR/BasicBlock.h"
#include "llvm/SandboxIR/Context.h"
#include "llvm/SandboxIR/Function.h"
#include "llvm/SandboxIR/Instruction.h"
namespace llvm::sandboxir {
BBIterator &BBIterator::operator++() {
auto ItE = BB->end();
assert(It != ItE && "Already at end!");
++It;
if (It == ItE)
return *this;
Instruction &NextI = *cast<sandboxir::Instruction>(Ctx->getValue(&*It));
unsigned Num = NextI.getNumOfIRInstrs();
assert(Num > 0 && "Bad getNumOfIRInstrs()");
It = std::next(It, Num - 1);
return *this;
}
BBIterator &BBIterator::operator--() {
assert(It != BB->begin() && "Already at begin!");
if (It == BB->end()) {
--It;
return *this;
}
Instruction &CurrI = **this;
unsigned Num = CurrI.getNumOfIRInstrs();
assert(Num > 0 && "Bad getNumOfIRInstrs()");
assert(std::prev(It, Num - 1) != BB->begin() && "Already at begin!");
It = std::prev(It, Num);
return *this;
}
BasicBlock *BBIterator::getNodeParent() const {
llvm::BasicBlock *Parent = const_cast<BBIterator *>(this)->It.getNodeParent();
return cast<BasicBlock>(Ctx->getValue(Parent));
}
BasicBlock::iterator::pointer
BasicBlock::iterator::getInstr(llvm::BasicBlock::iterator It) const {
return cast_or_null<Instruction>(Ctx->getValue(&*It));
}
Function *BasicBlock::getParent() const {
auto *BB = cast<llvm::BasicBlock>(Val);
auto *F = BB->getParent();
if (F == nullptr)
// Detached
return nullptr;
return cast_or_null<Function>(Ctx.getValue(F));
}
void BasicBlock::buildBasicBlockFromLLVMIR(llvm::BasicBlock *LLVMBB) {
for (llvm::Instruction &IRef : reverse(*LLVMBB)) {
llvm::Instruction *I = &IRef;
Ctx.getOrCreateValue(I);
for (auto [OpIdx, Op] : enumerate(I->operands())) {
// Skip instruction's label operands
if (isa<llvm::BasicBlock>(Op))
continue;
Ctx.getOrCreateValue(Op);
}
}
#if !defined(NDEBUG)
verify();
#endif
}
BasicBlock::iterator BasicBlock::begin() const {
llvm::BasicBlock *BB = cast<llvm::BasicBlock>(Val);
llvm::BasicBlock::iterator It = BB->begin();
if (!BB->empty()) {
auto *V = Ctx.getValue(&*BB->begin());
assert(V != nullptr && "No SandboxIR for BB->begin()!");
auto *I = cast<Instruction>(V);
unsigned Num = I->getNumOfIRInstrs();
assert(Num >= 1u && "Bad getNumOfIRInstrs()");
It = std::next(It, Num - 1);
}
return iterator(BB, It, &Ctx);
}
Instruction *BasicBlock::getTerminator() const {
auto *TerminatorV =
Ctx.getValue(cast<llvm::BasicBlock>(Val)->getTerminator());
return cast_or_null<Instruction>(TerminatorV);
}
Instruction &BasicBlock::front() const {
auto *BB = cast<llvm::BasicBlock>(Val);
assert(!BB->empty() && "Empty block!");
auto *SBI = cast<Instruction>(getContext().getValue(&*BB->begin()));
assert(SBI != nullptr && "Expected Instr!");
return *SBI;
}
Instruction &BasicBlock::back() const {
auto *BB = cast<llvm::BasicBlock>(Val);
assert(!BB->empty() && "Empty block!");
auto *SBI = cast<Instruction>(getContext().getValue(&*BB->rbegin()));
assert(SBI != nullptr && "Expected Instr!");
return *SBI;
}
#ifndef NDEBUG
void BasicBlock::dumpOS(raw_ostream &OS) const {
llvm::BasicBlock *BB = cast<llvm::BasicBlock>(Val);
const auto &Name = BB->getName();
OS << Name;
if (!Name.empty())
OS << ":\n";
// If there are Instructions in the BB that are not mapped to SandboxIR, then
// use a crash-proof dump.
if (any_of(*BB, [this](llvm::Instruction &I) {
return Ctx.getValue(&I) == nullptr;
})) {
OS << "<Crash-proof mode!>\n";
DenseSet<Instruction *> Visited;
for (llvm::Instruction &IRef : *BB) {
Value *SBV = Ctx.getValue(&IRef);
if (SBV == nullptr)
OS << IRef << " *** No SandboxIR ***\n";
else {
auto *SBI = dyn_cast<Instruction>(SBV);
if (SBI == nullptr) {
OS << IRef << " *** Not a SBInstruction!!! ***\n";
} else {
if (Visited.insert(SBI).second)
OS << *SBI << "\n";
}
}
}
} else {
for (auto &SBI : *this) {
SBI.dumpOS(OS);
OS << "\n";
}
}
}
void BasicBlock::verify() const {
assert(isa<llvm::BasicBlock>(Val) && "Expected BasicBlock!");
for (const auto &I : *this) {
I.verify();
}
}
#endif // NDEBUG
} // namespace llvm::sandboxir
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