mirror of
https://github.com/revng/revng
synced 2026-06-21 14:07:57 +00:00
Pietro Fezzardi
1198 lines
46 KiB
C++
1198 lines
46 KiB
C++
/// \brief DataFlow analysis to build the AST for a Function
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//
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// This file is distributed under the MIT License. See LICENSE.md for details.
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//
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// LLVM includes
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#include <llvm/IR/Instruction.h>
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// clang includes
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#include <clang/AST/ASTContext.h>
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#include <clang/AST/Decl.h>
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#include <clang/AST/DeclGroup.h>
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#include <clang/AST/Expr.h>
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#include <clang/AST/OperationKinds.h>
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#include <clang/AST/Stmt.h>
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// revng includes
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#include <revng/Support/IRHelpers.h>
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// local includes
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#include "ASTBuildAnalysis.h"
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#include "DecompilationHelpers.h"
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#include "IRASTTypeTranslation.h"
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#include "Mangling.h"
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static Logger<> ASTBuildLog("ast-builder");
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using namespace llvm;
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using namespace clang;
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using ClangType = clang::Type;
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using ClangPointerType = clang::PointerType;
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using LLVMType = llvm::Type;
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using LLVMPointerType = llvm::PointerType;
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using namespace IRASTTypeTranslation;
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namespace IR2AST {
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static bool needsLabel(const BasicBlock &) {
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return false;
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}
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Expr *StmtBuilder::getParenthesizedExprForValue(Value *V) {
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Expr *Res = getExprForValue(V);
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if (isa<clang::BinaryOperator>(Res) or isa<ConditionalOperator>(Res))
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Res = new (ASTCtx) ParenExpr({}, {}, Res);
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return Res;
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}
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Stmt *StmtBuilder::buildStmt(Instruction &I) {
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revng_log(ASTBuildLog, "Build AST for" << dumpToString(&I));
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switch (I.getOpcode()) {
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//
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// ---- SUPPORTED INSTRUCTIONS ----
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//
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//
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// ---- Terminators ----
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//
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case Instruction::Br: {
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revng_abort("branch instructions are not supported yet");
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auto *Branch = cast<BranchInst>(&I);
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if (Branch->isUnconditional()) {
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LabelDecl *Label = BBLabelDecls.at(Branch->getSuccessor(0));
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GotoStmt *GoTo = new (ASTCtx) GotoStmt(Label, {}, {});
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return GoTo;
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} else {
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LabelDecl *Then = BBLabelDecls.at(Branch->getSuccessor(0));
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LabelDecl *Else = BBLabelDecls.at(Branch->getSuccessor(1));
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GotoStmt *GoToThen = new (ASTCtx) GotoStmt(Then, {}, {});
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GotoStmt *GoToElse = new (ASTCtx) GotoStmt(Else, {}, {});
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Expr *Cond = getExprForValue(Branch->getCondition());
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revng_log(ASTBuildLog, "GOT!");
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if (ASTBuildLog.isEnabled() and Cond)
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Cond->dump();
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if (Cond->isLValue())
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Cond = ImplicitCastExpr::Create(ASTCtx,
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Cond->getType(),
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CastKind::CK_LValueToRValue,
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Cond,
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nullptr,
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VK_RValue);
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return new (ASTCtx) IfStmt(ASTCtx,
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{},
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false,
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nullptr,
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nullptr,
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Cond,
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GoToThen,
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{},
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GoToElse);
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}
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}
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case Instruction::Ret: {
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// FIXME: handle returned values properly
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ReturnInst *Ret = cast<ReturnInst>(&I);
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Value *RetVal = Ret->getReturnValue();
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Expr *ReturnedExpr = RetVal ? getExprForValue(RetVal) : nullptr;
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return new (ASTCtx) ReturnStmt({}, ReturnedExpr, nullptr);
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}
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case Instruction::Switch: {
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revng_abort("switch instructions are not supported yet");
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auto *Switch = cast<SwitchInst>(&I);
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Value *Cond = Switch->getCondition();
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Expr *CondE = getExprForValue(Cond);
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SwitchStmt *S = new (ASTCtx) SwitchStmt(ASTCtx, nullptr, nullptr, CondE);
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unsigned NumCases = Switch->getNumCases() + 1; // +1 is for the default
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CompoundStmt *Body = CompoundStmt::CreateEmpty(ASTCtx, NumCases);
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BasicBlock *DefaultBlock = Switch->getDefaultDest();
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LabelDecl *DefaultLabel = BBLabelDecls.at(DefaultBlock);
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GotoStmt *GoToDefault = new (ASTCtx) GotoStmt(DefaultLabel, {}, {});
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DefaultStmt *Default = new (ASTCtx) DefaultStmt({}, {}, GoToDefault);
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S->addSwitchCase(Default);
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int K = 0;
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for (auto CIt : Switch->cases()) {
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BasicBlock *CaseBlock = CIt.getCaseSuccessor();
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if (CaseBlock == DefaultBlock)
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continue;
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ConstantInt *CaseVal = CIt.getCaseValue();
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Expr *CaseCond = getExprForValue(CaseVal);
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LabelDecl *CaseLabel = BBLabelDecls.at(CaseBlock);
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GotoStmt *GoToCase = new (ASTCtx) GotoStmt(CaseLabel, {}, {});
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CaseStmt *Case = new (ASTCtx) CaseStmt(CaseCond, nullptr, {}, {}, {});
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Case->setSubStmt(GoToCase);
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S->addSwitchCase(Case);
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Body->body_begin()[K++] = Case;
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}
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Body->body_begin()[K] = Default;
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S->setBody(Body);
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return S;
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}
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//
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// ---- Standard binary operators ----
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//
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case Instruction::Add:
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case Instruction::Sub:
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case Instruction::Mul:
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//
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// ---- Standard division operators (with signedness) ----
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//
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case Instruction::UDiv:
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case Instruction::SDiv:
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case Instruction::URem:
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case Instruction::SRem:
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//
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// ---- Logical operators ----
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//
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case Instruction::And:
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case Instruction::Or:
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case Instruction::Xor:
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//
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// ---- Other instructions ----
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//
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case Instruction::ICmp:
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case Instruction::Shl:
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case Instruction::LShr:
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case Instruction::AShr: {
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return createRValueExprForBinaryOperator(I);
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}
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//
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// ---- Memory instructions ----
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//
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case Instruction::Alloca: {
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VarDecl *ArrayDecl = AllocaDecls.at(cast<AllocaInst>(&I));
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QualType ArrayTy = ArrayDecl->getType();
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// Create an Expr for the address of the first element of the array.
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QualType CharPtrTy = ASTCtx.getPointerType(ASTCtx.CharTy);
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Expr *ArrayDeclRef = new (ASTCtx)
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DeclRefExpr(ArrayDecl, false, ArrayTy, VK_LValue, {});
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CastKind Kind = CastKind::CK_ArrayToPointerDecay;
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Expr *ArrayPtrDecay = ImplicitCastExpr::Create(ASTCtx,
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CharPtrTy,
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Kind,
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ArrayDeclRef,
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nullptr,
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VK_RValue);
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Expr *ArrayIdx = IntegerLiteral::Create(ASTCtx,
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APInt::getNullValue(32),
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ASTCtx.IntTy,
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{});
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Expr *ArraySubscript = new (ASTCtx) ArraySubscriptExpr(ArrayPtrDecay,
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ArrayIdx,
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ASTCtx.CharTy,
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VK_LValue,
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OK_Ordinary,
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{});
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using Unary = clang::UnaryOperator;
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return new (ASTCtx) Unary(ArraySubscript,
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UnaryOperatorKind::UO_AddrOf,
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CharPtrTy,
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VK_RValue,
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OK_Ordinary,
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{},
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false);
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}
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case Instruction::Load: {
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auto *Load = cast<LoadInst>(&I);
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Value *Addr = Load->getPointerOperand();
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Expr *AddrExpr = getParenthesizedExprForValue(Addr);
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revng_log(ASTBuildLog, "GOT!");
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if (ASTBuildLog.isEnabled() and AddrExpr)
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AddrExpr->dump();
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if (not isa<GlobalVariable>(Addr)) {
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clang::DeclContext &TUDecl = *ASTCtx.getTranslationUnitDecl();
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QualType PointeeType = getOrCreateQualType(Load,
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ASTCtx,
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TUDecl,
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TypeDecls,
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FieldDecls);
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QualType QualAddrType = AddrExpr->getType();
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const ClangType *AddrTy = QualAddrType.getTypePtr();
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if (not AddrTy->isPointerType()) {
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revng_assert(AddrTy->isBuiltinType());
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revng_assert(AddrTy->isIntegerType());
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QualType PtrTy = ASTCtx.getPointerType(PointeeType);
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uint64_t PtrSize = ASTCtx.getTypeSize(PtrTy);
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uint64_t IntegerSize = ASTCtx.getTypeSize(AddrTy);
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revng_assert(PtrSize >= IntegerSize);
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if (PtrSize > IntegerSize)
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AddrExpr = createCast(ASTCtx.getUIntPtrType(), AddrExpr, ASTCtx);
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AddrExpr = createCast(PtrTy, AddrExpr, ASTCtx);
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}
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if (isa<llvm::ConstantPointerNull>(Addr)) {
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QualType QualPtrTy = AddrExpr->getType();
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const auto *PtrType = cast<ClangPointerType>(QualPtrTy.getTypePtr());
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QualType QualPointeeTy = PtrType->getPointeeType();
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QualPointeeTy.addVolatile();
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QualType PtrToVolatileTy = ASTCtx.getPointerType(QualPointeeTy);
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AddrExpr = createCast(PtrToVolatileTy, AddrExpr, ASTCtx);
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}
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using Unary = clang::UnaryOperator;
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return new (ASTCtx) Unary(AddrExpr,
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UnaryOperatorKind::UO_Deref,
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PointeeType,
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VK_LValue,
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OK_Ordinary,
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{},
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false);
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}
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return AddrExpr;
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}
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case Instruction::Store: {
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auto *Store = cast<StoreInst>(&I);
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Value *Stored = Store->getValueOperand();
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if (isa<UndefValue>(Stored))
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return nullptr;
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Expr *LHS = getParenthesizedExprForValue(Store);
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QualType LHSQualTy = LHS->getType();
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revng_log(ASTBuildLog, "GOT!");
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if (ASTBuildLog.isEnabled() and LHS)
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LHS->dump();
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Expr *RHS = getParenthesizedExprForValue(Stored);
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revng_log(ASTBuildLog, "GOT!");
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if (ASTBuildLog.isEnabled() and RHS)
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RHS->dump();
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if (RHS->getType() != LHSQualTy) {
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if (isa<clang::BinaryOperator>(RHS))
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RHS = new (ASTCtx) ParenExpr({}, {}, RHS);
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RHS = createCast(LHSQualTy, RHS, ASTCtx);
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}
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BinaryOperatorKind BinOpKind = BinaryOperatorKind::BO_Assign;
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return new (ASTCtx) clang::BinaryOperator(LHS,
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RHS,
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BinOpKind,
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LHSQualTy,
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VK_RValue,
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OK_Ordinary,
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{},
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FPOptions());
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}
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//
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// ---- Convert instructions ----
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//
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case Instruction::Trunc:
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case Instruction::ZExt:
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case Instruction::SExt:
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case Instruction::IntToPtr:
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case Instruction::PtrToInt:
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case Instruction::BitCast: {
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revng_assert(I.getNumOperands() == 1);
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Expr *Res = getParenthesizedExprForValue(I.getOperand(0));
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clang::DeclContext &TUDecl = *ASTCtx.getTranslationUnitDecl();
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QualType LHSQualType = getOrCreateQualType(&I,
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ASTCtx,
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TUDecl,
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TypeDecls,
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FieldDecls);
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if (LHSQualType != Res->getType())
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Res = createCast(LHSQualType, Res, ASTCtx);
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revng_log(ASTBuildLog, "GOT!");
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if (ASTBuildLog.isEnabled() and Res)
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Res->dump();
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return Res;
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}
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// ---- Other instructions ----
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case Instruction::Select: {
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Expr *Cond = getParenthesizedExprForValue(I.getOperand(0));
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revng_log(ASTBuildLog, "GOT!");
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if (ASTBuildLog.isEnabled() and Cond)
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Cond->dump();
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Expr *TrueExpr = getParenthesizedExprForValue(I.getOperand(1));
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revng_log(ASTBuildLog, "GOT!");
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if (ASTBuildLog.isEnabled() and TrueExpr)
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TrueExpr->dump();
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Expr *FalseExpr = getParenthesizedExprForValue(I.getOperand(2));
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revng_log(ASTBuildLog, "GOT!");
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if (ASTBuildLog.isEnabled() and FalseExpr)
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FalseExpr->dump();
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clang::DeclContext &TUDecl = *ASTCtx.getTranslationUnitDecl();
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QualType ASTType = getOrCreateQualType(&I,
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ASTCtx,
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TUDecl,
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TypeDecls,
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FieldDecls);
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return new (ASTCtx) ConditionalOperator(Cond,
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{},
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TrueExpr,
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{},
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FalseExpr,
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ASTType,
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VK_RValue,
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OK_Ordinary);
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}
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case Instruction::Call: {
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auto *TheCall = cast<CallInst>(&I);
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Function *CalleeFun = getCallee(TheCall);
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Expr *CalleeExpr = getExprForValue(CalleeFun);
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revng_log(ASTBuildLog, "GOT!");
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if (ASTBuildLog.isEnabled() and CalleeExpr)
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CalleeExpr->dump();
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size_t NumArgs = CalleeFun->arg_size();
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FunctionDecl *FD = FunctionDecls.at(CalleeFun);
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size_t NumParms = FD->param_size();
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unsigned NumOps = TheCall->getNumArgOperands();
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bool HasNoParms = NumParms == 0
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or (NumParms == 1
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and FD->getParamDecl(0)->getType() == ASTCtx.VoidTy);
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revng_assert(HasNoParms or NumArgs == NumParms);
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revng_assert(NumArgs == NumOps);
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auto Args = SmallVector<Expr *, 8>(NumOps, nullptr);
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if (not HasNoParms) {
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for (unsigned OpId = 0; OpId < NumOps; ++OpId) {
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Value *Operand = TheCall->getOperand(OpId);
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Expr *ArgExpr = getExprForValue(Operand);
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QualType ArgQualTy = ArgExpr->getType();
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ParmVarDecl *ParmDecl = FD->getParamDecl(OpId);
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QualType ParmQualTy = ParmDecl->getType();
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if (ParmQualTy != ArgQualTy) {
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ArgExpr = new (ASTCtx) ParenExpr({}, {}, ArgExpr);
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ArgExpr = createCast(ParmQualTy, ArgExpr, ASTCtx);
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}
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Args[OpId] = ArgExpr;
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}
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}
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clang::DeclContext &TUDecl = *ASTCtx.getTranslationUnitDecl();
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QualType ReturnType = getOrCreateQualType(TheCall,
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ASTCtx,
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TUDecl,
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TypeDecls,
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FieldDecls);
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return new (ASTCtx)
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CallExpr(ASTCtx, CalleeExpr, Args, ReturnType, VK_RValue, {});
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}
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case Instruction::Unreachable: {
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Function *AbortFun = F.getParent()->getFunction("abort");
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Expr *CalleeExpr = getExprForValue(AbortFun);
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SmallVector<Expr *, 8> Args;
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QualType ReturnType = ASTCtx.VoidTy;
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return new (ASTCtx)
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CallExpr(ASTCtx, CalleeExpr, Args, ReturnType, VK_RValue, {});
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}
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//
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// ---- Instructions for struct manipulation ----
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//
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case Instruction::InsertValue: {
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InsertValueInst *Insert = cast<InsertValueInst>(&I);
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revng_assert(Insert->getNumIndices() == 1);
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Value *AggregateOp = Insert->getAggregateOperand();
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revng_assert(isa<UndefValue>(AggregateOp)
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or isa<InsertValueInst>(AggregateOp));
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llvm::Type *AggregateTy = AggregateOp->getType();
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clang::TypeDecl *StructTypeDecl = TypeDecls.at(AggregateTy);
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Expr *StructExpr = getExprForValue(Insert);
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clang::DeclContext &TUDecl = *ASTCtx.getTranslationUnitDecl();
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QualType InsertedTy = getOrCreateQualType(Insert,
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ASTCtx,
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TUDecl,
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TypeDecls,
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FieldDecls);
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unsigned Idx = *Insert->idx_begin();
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FieldDecl *InsertedFieldDecl = FieldDecls.at(StructTypeDecl)[Idx];
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clang::DeclarationName FieldDeclName = InsertedFieldDecl->getIdentifier();
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clang::DeclarationNameInfo FieldDeclNameInfo(FieldDeclName, {});
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clang::Expr *LHS = new (ASTCtx) MemberExpr(StructExpr,
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/*isarrow*/ false,
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{},
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InsertedFieldDecl,
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FieldDeclNameInfo,
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InsertedTy,
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VK_LValue,
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OK_Ordinary);
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clang::Expr *RHS = getExprForValue(Insert->getInsertedValueOperand());
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BinaryOperatorKind BinOpKind = BinaryOperatorKind::BO_Assign;
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AdditionalStmts[&I].push_back(new (ASTCtx)
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clang::BinaryOperator(LHS,
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RHS,
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BinOpKind,
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LHS->getType(),
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VK_RValue,
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OK_Ordinary,
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{},
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FPOptions()));
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if (isa<UndefValue>(AggregateOp))
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return nullptr;
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return getExprForValue(AggregateOp);
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}
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case Instruction::ExtractValue: {
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ExtractValueInst *Extract = cast<ExtractValueInst>(&I);
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revng_assert(Extract->getNumIndices() == 1);
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Value *AggregateOp = Extract->getAggregateOperand();
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if (isa<UndefValue>(AggregateOp))
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return nullptr;
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revng_assert(isa<CallInst>(AggregateOp));
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llvm::Type *AggregateTy = AggregateOp->getType();
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clang::TypeDecl *StructTypeDecl = TypeDecls.at(AggregateTy);
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Expr *StructExpr = getExprForValue(AggregateOp);
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clang::DeclContext &TUDecl = *ASTCtx.getTranslationUnitDecl();
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QualType ExtractedTy = getOrCreateQualType(Extract,
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ASTCtx,
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TUDecl,
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TypeDecls,
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FieldDecls);
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unsigned Idx = *Extract->idx_begin();
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FieldDecl *ExtractedFieldDecl = FieldDecls.at(StructTypeDecl)[Idx];
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clang::DeclarationName FieldDeclName = ExtractedFieldDecl->getIdentifier();
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clang::DeclarationNameInfo FieldDeclNameInfo(FieldDeclName, {});
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return new (ASTCtx) MemberExpr(StructExpr,
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/*isarrow*/ false,
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{},
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ExtractedFieldDecl,
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FieldDeclNameInfo,
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ExtractedTy,
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VK_RValue,
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OK_Ordinary);
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}
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// ---- UNSUPPORTED INSTRUCTIONS ----
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// Terminators
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case Instruction::IndirectBr:
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case Instruction::Invoke:
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case Instruction::Resume:
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case Instruction::CleanupRet:
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case Instruction::CatchRet:
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case Instruction::CatchPad:
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case Instruction::CatchSwitch:
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// Memory instructions
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case Instruction::GetElementPtr:
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case Instruction::AtomicCmpXchg:
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case Instruction::AtomicRMW:
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case Instruction::Fence:
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// Binary operators for floats
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case Instruction::FAdd:
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case Instruction::FSub:
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case Instruction::FMul:
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case Instruction::FDiv:
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case Instruction::FRem:
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// Convert instructions
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case Instruction::FPTrunc:
|
|
case Instruction::FPExt:
|
|
case Instruction::FPToUI:
|
|
case Instruction::FPToSI:
|
|
case Instruction::UIToFP:
|
|
case Instruction::SIToFP:
|
|
case Instruction::AddrSpaceCast:
|
|
// Other instructions
|
|
case Instruction::PHI:
|
|
case Instruction::FCmp:
|
|
case Instruction::VAArg:
|
|
case Instruction::ExtractElement:
|
|
case Instruction::InsertElement:
|
|
case Instruction::ShuffleVector:
|
|
case Instruction::LandingPad:
|
|
case Instruction::CleanupPad:
|
|
default:
|
|
revng_abort("Unexpected operation");
|
|
}
|
|
revng_abort("Unexpected operation");
|
|
}
|
|
|
|
static bool isPure(const Instruction & /*Call*/) {
|
|
return false;
|
|
}
|
|
|
|
void StmtBuilder::createAST() {
|
|
revng_log(ASTBuildLog,
|
|
"Building AST for Instructions in Function " << F.getName());
|
|
|
|
uint64_t BBId = 0;
|
|
{
|
|
IdentifierInfo &Id = ASTCtx.Idents.get("loop_state_var");
|
|
LoopStateVarDecl = VarDecl::Create(ASTCtx,
|
|
&FDecl,
|
|
{},
|
|
{},
|
|
&Id,
|
|
ASTCtx.UnsignedIntTy,
|
|
nullptr,
|
|
StorageClass::SC_None);
|
|
FDecl.addDecl(LoopStateVarDecl);
|
|
}
|
|
|
|
ReversePostOrderTraversal<Function *> RPOT(&F);
|
|
for (BasicBlock *BB : RPOT) {
|
|
revng_log(ASTBuildLog, "BB: " << BB->getName());
|
|
|
|
{
|
|
// Create labels for Basic Blocks. This could potentially be disabled if
|
|
// we choose not to have the option to emit goto statements ever.
|
|
IdentifierInfo &Id = ASTCtx.Idents.get("bb_" + std::to_string(BBId++));
|
|
LabelDecl *Label = LabelDecl::Create(ASTCtx, &FDecl, {}, &Id);
|
|
BBLabelDecls[BB] = Label;
|
|
}
|
|
|
|
for (Instruction &I : *BB) {
|
|
// We don't build clang's AST expressions for PHINodes nor for
|
|
// BranchInsts.
|
|
// PHINodes are not expanded into expressions because they expand in a
|
|
// local variable, that is assigned multiple times for all the incoming
|
|
// Values of the PHINode.
|
|
// For BranchInsts, we don't create AST right now, because the emission of
|
|
// control flow statements in C is driven by the ASTTree
|
|
if (isa<BranchInst>(&I))
|
|
continue;
|
|
|
|
// Each PHINode has an associated VarDecl
|
|
if (isa<PHINode>(&I)) {
|
|
revng_assert(VarDecls.count(&I) == 0);
|
|
VarDecl *NewVarDecl = createVarDecl(&I);
|
|
VarDecls[&I] = NewVarDecl;
|
|
continue;
|
|
}
|
|
|
|
if (isa<AllocaInst>(&I)) {
|
|
// TODO: for now we ignore the alignment of the alloca. This might turn
|
|
// out not to be safe later, because it does not take into account the
|
|
// alignment of future accesses in the `Alloca`ted space. If the code is
|
|
// then recompiled for an architecture that does not support unaligned
|
|
// access this may cause crashes.
|
|
AllocaInst *Alloca = cast<AllocaInst>(&I);
|
|
revng_assert(Alloca->isStaticAlloca());
|
|
// First, create a VarDecl, for an array of char to place in the
|
|
// BasicBlock where the AllocaInst is
|
|
const DataLayout &DL = F.getParent()->getDataLayout();
|
|
uint64_t AllocaSize = *Alloca->getAllocationSizeInBits(DL);
|
|
revng_assert(AllocaSize <= std::numeric_limits<unsigned>::max());
|
|
APInt ArraySize = APInt(32, static_cast<unsigned>(AllocaSize));
|
|
using ArraySizeMod = clang::ArrayType::ArraySizeModifier;
|
|
ArraySizeMod SizeMod = ArraySizeMod::Normal;
|
|
QualType CharTy = ASTCtx.CharTy;
|
|
QualType ArrayTy = ASTCtx.getConstantArrayType(CharTy,
|
|
ArraySize,
|
|
SizeMod,
|
|
0);
|
|
const std::string VarName = "var_" + std::to_string(NVar++);
|
|
IdentifierInfo &Id = ASTCtx.Idents.get(VarName);
|
|
VarDecl *ArrayDecl = VarDecl::Create(ASTCtx,
|
|
&FDecl,
|
|
{},
|
|
{},
|
|
&Id,
|
|
ArrayTy,
|
|
nullptr,
|
|
StorageClass::SC_None);
|
|
FDecl.addDecl(ArrayDecl);
|
|
AllocaDecls[Alloca] = ArrayDecl;
|
|
}
|
|
|
|
if (isa<InsertValueInst>(&I) or isa<ExtractValueInst>(&I)) {
|
|
revng_assert(VarDecls.count(&I) == 0);
|
|
VarDecl *NewVarDecl = createVarDecl(&I);
|
|
VarDecls[&I] = NewVarDecl;
|
|
}
|
|
|
|
Stmt *NewStmt = buildStmt(I);
|
|
if (NewStmt == nullptr)
|
|
continue;
|
|
InstrStmts[&I] = NewStmt;
|
|
|
|
if (not isa<InsertValueInst>(&I) and not isa<ExtractValueInst>(&I)
|
|
and I.getNumUses() > 0 and ToSerialize.count(&I)) {
|
|
revng_assert(VarDecls.count(&I) == 0);
|
|
VarDecl *NewVarDecl = createVarDecl(&I);
|
|
VarDecls[&I] = NewVarDecl;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
VarDecl *StmtBuilder::createVarDecl(Instruction *I) {
|
|
clang::DeclContext &TUDecl = *ASTCtx.getTranslationUnitDecl();
|
|
QualType ASTType = getOrCreateQualType(I,
|
|
ASTCtx,
|
|
TUDecl,
|
|
TypeDecls,
|
|
FieldDecls);
|
|
revng_assert(not ASTType.isNull());
|
|
const std::string VarName = "var_" + std::to_string(NVar++);
|
|
IdentifierInfo &Id = ASTCtx.Idents.get(VarName);
|
|
VarDecl *NewVarDecl = VarDecl::Create(ASTCtx,
|
|
&FDecl,
|
|
{},
|
|
{},
|
|
&Id,
|
|
ASTType,
|
|
nullptr,
|
|
StorageClass::SC_None);
|
|
FDecl.addDecl(NewVarDecl);
|
|
return NewVarDecl;
|
|
}
|
|
|
|
static clang::BinaryOperatorKind getClangBinaryOpKind(const Instruction &I) {
|
|
clang::BinaryOperatorKind Res;
|
|
switch (I.getOpcode()) {
|
|
case Instruction::Add: {
|
|
Res = clang::BinaryOperatorKind::BO_Add;
|
|
} break;
|
|
case Instruction::Sub: {
|
|
Res = clang::BinaryOperatorKind::BO_Sub;
|
|
} break;
|
|
case Instruction::Mul: {
|
|
Res = clang::BinaryOperatorKind::BO_Mul;
|
|
}
|
|
case Instruction::And: {
|
|
Res = clang::BinaryOperatorKind::BO_And;
|
|
} break;
|
|
case Instruction::Or: {
|
|
Res = clang::BinaryOperatorKind::BO_Or;
|
|
} break;
|
|
case Instruction::Xor: {
|
|
Res = clang::BinaryOperatorKind::BO_Xor;
|
|
} break;
|
|
case Instruction::ICmp: {
|
|
auto *CompareI = cast<CmpInst>(&I);
|
|
switch (CompareI->getPredicate()) {
|
|
case CmpInst::ICMP_EQ: {
|
|
Res = clang::BinaryOperatorKind::BO_EQ;
|
|
} break;
|
|
case CmpInst::ICMP_NE: {
|
|
Res = clang::BinaryOperatorKind::BO_NE;
|
|
} break;
|
|
case CmpInst::ICMP_UGT:
|
|
case CmpInst::ICMP_SGT: {
|
|
Res = clang::BinaryOperatorKind::BO_GT;
|
|
} break;
|
|
case CmpInst::ICMP_UGE:
|
|
case CmpInst::ICMP_SGE: {
|
|
Res = clang::BinaryOperatorKind::BO_GE;
|
|
} break;
|
|
case CmpInst::ICMP_ULT:
|
|
case CmpInst::ICMP_SLT: {
|
|
Res = clang::BinaryOperatorKind::BO_LT;
|
|
} break;
|
|
case CmpInst::ICMP_ULE:
|
|
case CmpInst::ICMP_SLE: {
|
|
Res = clang::BinaryOperatorKind::BO_LE;
|
|
} break;
|
|
default:
|
|
revng_abort("Unsupported comparison operator");
|
|
}
|
|
} break;
|
|
case Instruction::Shl: {
|
|
Res = clang::BinaryOperatorKind::BO_Shl;
|
|
} break;
|
|
case Instruction::LShr:
|
|
case Instruction::AShr: {
|
|
Res = clang::BinaryOperatorKind::BO_Shr;
|
|
} break;
|
|
case Instruction::UDiv:
|
|
case Instruction::SDiv: {
|
|
Res = clang::BinaryOperatorKind::BO_Div;
|
|
} break;
|
|
case Instruction::URem:
|
|
case Instruction::SRem: {
|
|
Res = clang::BinaryOperatorKind::BO_Rem;
|
|
} break;
|
|
default: {
|
|
revng_log(ASTBuildLog, "Unsupported operation" << dumpToString(&I) << '\n');
|
|
revng_abort("Unsupported binary operator");
|
|
}
|
|
}
|
|
return Res;
|
|
}
|
|
|
|
static bool is128Int(ASTContext &ASTCtx, clang::Expr *E) {
|
|
const clang::Type *T = E->getType().getTypePtr();
|
|
const clang::Type *Int128T = ASTCtx.Int128Ty.getTypePtr();
|
|
const clang::Type *UInt128T = ASTCtx.UnsignedInt128Ty.getTypePtr();
|
|
return T == Int128T or T == UInt128T;
|
|
}
|
|
|
|
static std::pair<Expr *, Expr *> getCastedBinaryOperands(ASTContext &ASTCtx,
|
|
const Instruction &I,
|
|
Expr *LHS,
|
|
Expr *RHS) {
|
|
std::pair<Expr *, Expr *> Res = std::make_pair(LHS, RHS);
|
|
|
|
QualType LHSQualTy = LHS->getType();
|
|
QualType RHSQualTy = RHS->getType();
|
|
const ClangType *LHSTy = LHSQualTy.getTypePtr();
|
|
const ClangType *RHSTy = RHSQualTy.getTypePtr();
|
|
revng_assert(LHSTy->isIntegerType() and RHSTy->isIntegerType());
|
|
uint64_t LHSSize = ASTCtx.getTypeSize(LHSTy);
|
|
uint64_t RHSSize = ASTCtx.getTypeSize(RHSTy);
|
|
unsigned OpCode = I.getOpcode();
|
|
revng_assert(LHSSize == RHSSize or OpCode == Instruction::Shl
|
|
or OpCode == Instruction::LShr or OpCode == Instruction::AShr
|
|
or is128Int(ASTCtx, RHS) or is128Int(ASTCtx, LHS));
|
|
uint64_t Size = std::max(LHSSize, RHSSize);
|
|
QualType SignedTy = ASTCtx.getIntTypeForBitwidth(Size, /* Signed */ true);
|
|
|
|
switch (OpCode) {
|
|
case Instruction::Add:
|
|
case Instruction::Sub:
|
|
case Instruction::Mul:
|
|
case Instruction::And:
|
|
case Instruction::Or:
|
|
case Instruction::Xor:
|
|
case Instruction::UDiv:
|
|
case Instruction::URem:
|
|
case Instruction::Shl:
|
|
case Instruction::LShr: {
|
|
// These instructions have unsigned semantics in llvm IR.
|
|
// We emit unsigned integers by default, so these operations do not need
|
|
// any cast to preserve the semantics in C.
|
|
} break;
|
|
|
|
case Instruction::SDiv:
|
|
case Instruction::SRem:
|
|
case Instruction::AShr:
|
|
case Instruction::ICmp: {
|
|
if (OpCode != Instruction::ICmp or cast<CmpInst>(&I)->isSigned()) {
|
|
if (RHSTy->isUnsignedIntegerType())
|
|
Res.second = createCast(SignedTy, Res.second, ASTCtx);
|
|
if (LHSTy->isUnsignedIntegerType())
|
|
Res.first = createCast(SignedTy, Res.first, ASTCtx);
|
|
}
|
|
} break;
|
|
|
|
default: {
|
|
revng_log(ASTBuildLog, "Unsupported operation" << dumpToString(&I) << '\n');
|
|
revng_abort("Unsupported binary operator");
|
|
}
|
|
}
|
|
return Res;
|
|
}
|
|
|
|
Expr *StmtBuilder::createRValueExprForBinaryOperator(Instruction &I) {
|
|
revng_assert(I.getNumOperands() == 2);
|
|
BinaryOperatorKind BinOpKind = getClangBinaryOpKind(I);
|
|
|
|
Value *LHSVal = I.getOperand(0);
|
|
Expr *LHS = getParenthesizedExprForValue(LHSVal);
|
|
revng_log(ASTBuildLog, "GOT!");
|
|
if (ASTBuildLog.isEnabled() and LHS)
|
|
LHS->dump();
|
|
if (LHS->isLValue())
|
|
LHS = ImplicitCastExpr::Create(ASTCtx,
|
|
LHS->getType(),
|
|
CastKind::CK_LValueToRValue,
|
|
LHS,
|
|
nullptr,
|
|
VK_RValue);
|
|
|
|
Value *RHSVal = I.getOperand(1);
|
|
Expr *RHS = getParenthesizedExprForValue(RHSVal);
|
|
revng_log(ASTBuildLog, "GOT!");
|
|
if (ASTBuildLog.isEnabled() and RHS)
|
|
RHS->dump();
|
|
if (RHS->isLValue())
|
|
RHS = ImplicitCastExpr::Create(ASTCtx,
|
|
RHS->getType(),
|
|
CastKind::CK_LValueToRValue,
|
|
RHS,
|
|
nullptr,
|
|
VK_RValue);
|
|
|
|
std::tie(LHS, RHS) = getCastedBinaryOperands(ASTCtx, I, LHS, RHS);
|
|
|
|
Expr *Res = new (ASTCtx) clang::BinaryOperator(LHS,
|
|
RHS,
|
|
BinOpKind,
|
|
LHS->getType(),
|
|
VK_RValue,
|
|
OK_Ordinary,
|
|
{},
|
|
FPOptions());
|
|
|
|
unsigned OpCode = I.getOpcode();
|
|
switch (OpCode) {
|
|
case Instruction::SDiv:
|
|
case Instruction::SRem:
|
|
case Instruction::AShr:
|
|
case Instruction::ICmp: {
|
|
clang::DeclContext &TUDecl = *ASTCtx.getTranslationUnitDecl();
|
|
QualType ResType = getOrCreateQualType(&I,
|
|
ASTCtx,
|
|
TUDecl,
|
|
TypeDecls,
|
|
FieldDecls);
|
|
Res = new (ASTCtx) ParenExpr({}, {}, Res);
|
|
Res = createCast(ResType, Res, ASTCtx);
|
|
} break;
|
|
default:
|
|
break;
|
|
}
|
|
return Res;
|
|
}
|
|
|
|
Expr *StmtBuilder::getUIntLiteral(uint64_t U) {
|
|
QualType UIntT = ASTCtx.UnsignedIntTy;
|
|
APInt Const = APInt(ASTCtx.getIntWidth(UIntT), U);
|
|
return IntegerLiteral::Create(ASTCtx, Const, UIntT, {});
|
|
}
|
|
|
|
Expr *StmtBuilder::getExprForValue(Value *V) {
|
|
revng_log(ASTBuildLog, "getExprForValue: " << dumpToString(V));
|
|
if (isa<ConstantData>(V) or isa<ConstantExpr>(V)) {
|
|
return getLiteralFromConstant(cast<Constant>(V));
|
|
} else if (auto *F = dyn_cast<Function>(V)) {
|
|
FunctionDecl *FDecl = FunctionDecls.at(F);
|
|
QualType Type = FDecl->getType();
|
|
DeclRefExpr *Res = new (ASTCtx)
|
|
DeclRefExpr(FDecl, false, Type, VK_LValue, {});
|
|
return Res;
|
|
} else if (auto *G = dyn_cast<GlobalVariable>(V)) {
|
|
VarDecl *GlobalVarDecl = GlobalDecls.at(G);
|
|
QualType Type = GlobalVarDecl->getType();
|
|
DeclRefExpr *Res = new (ASTCtx)
|
|
DeclRefExpr(GlobalVarDecl, false, Type, VK_LValue, {});
|
|
return Res;
|
|
} else if (auto *I = dyn_cast<Instruction>(V)) {
|
|
|
|
// For all the other instructions that have already been marked for
|
|
// serialization we should have an associated entry in VarDecl.
|
|
// We simply return a DeclRefExpr wrapping the VarDecl associated with I.
|
|
auto VarDeclIt = VarDecls.find(I);
|
|
if (VarDeclIt != VarDecls.end()) {
|
|
revng_assert(VarDeclIt->second != nullptr);
|
|
VarDecl *VDecl = VarDeclIt->second;
|
|
QualType Type = VDecl->getType();
|
|
DeclRefExpr *Res = new (ASTCtx)
|
|
DeclRefExpr(VDecl, false, Type, VK_LValue, {});
|
|
return Res;
|
|
}
|
|
|
|
auto InstrStmtIt = InstrStmts.find(I);
|
|
if (InstrStmtIt != InstrStmts.end()) {
|
|
// If the Instruction has an entry in InstrStmts, it means that we have
|
|
// already computed an expression for it, so we can directly use that.
|
|
return cast<Expr>(InstrStmtIt->second);
|
|
}
|
|
|
|
// If we reach this point we are creating an expression for a new
|
|
// Instruction. This should only happen for Load, Store and casts.
|
|
|
|
// If we don't have a VarDecl associated with I
|
|
if (isa<LoadInst>(I) or isa<StoreInst>(I)) {
|
|
// Load and Store Instruction are serialized as ExprLHS = ExprRHS.
|
|
// getExprForValue returns the ExprLHS.
|
|
auto *Store = dyn_cast<StoreInst>(I);
|
|
auto *Load = dyn_cast<LoadInst>(I);
|
|
|
|
Value *Addr = nullptr;
|
|
if (Load)
|
|
Addr = Load->getPointerOperand();
|
|
else
|
|
Addr = Store->getPointerOperand();
|
|
|
|
Expr *AddrExpr = getParenthesizedExprForValue(Addr);
|
|
revng_log(ASTBuildLog, "GOT!");
|
|
if (ASTBuildLog.isEnabled() and AddrExpr)
|
|
AddrExpr->dump();
|
|
// If we're moving from or into a GlobalVariable ExprLHS is just
|
|
// DeclRefExpr for that GlobalVariable
|
|
if (isa<GlobalVariable>(Addr))
|
|
return AddrExpr;
|
|
|
|
// Otherwise ExprLHS dereferences AddrExpr
|
|
QualType QualAddrType = AddrExpr->getType();
|
|
AddrExpr = ImplicitCastExpr::Create(ASTCtx,
|
|
QualAddrType,
|
|
CastKind::CK_LValueToRValue,
|
|
AddrExpr,
|
|
nullptr,
|
|
VK_RValue);
|
|
|
|
clang::DeclContext &TUDecl = *ASTCtx.getTranslationUnitDecl();
|
|
QualType PointeeType;
|
|
if (Load) {
|
|
PointeeType = getOrCreateQualType(Load,
|
|
ASTCtx,
|
|
TUDecl,
|
|
TypeDecls,
|
|
FieldDecls);
|
|
} else {
|
|
Value *Stored = Store->getValueOperand();
|
|
PointeeType = getOrCreateQualType(Stored,
|
|
ASTCtx,
|
|
TUDecl,
|
|
TypeDecls,
|
|
FieldDecls);
|
|
}
|
|
|
|
QualAddrType = AddrExpr->getType();
|
|
const ClangType *AddrTy = QualAddrType.getTypePtr();
|
|
if (not AddrTy->isPointerType()) {
|
|
revng_assert(AddrTy->isBuiltinType());
|
|
revng_assert(AddrTy->isIntegerType());
|
|
|
|
QualType PtrTy = ASTCtx.getPointerType(PointeeType);
|
|
uint64_t PtrSize = ASTCtx.getTypeSize(PtrTy);
|
|
uint64_t IntegerSize = ASTCtx.getTypeSize(AddrTy);
|
|
revng_assert(PtrSize >= IntegerSize);
|
|
if (PtrSize > IntegerSize)
|
|
AddrExpr = createCast(ASTCtx.getUIntPtrType(), AddrExpr, ASTCtx);
|
|
AddrExpr = createCast(PtrTy, AddrExpr, ASTCtx);
|
|
}
|
|
|
|
if (isa<llvm::ConstantPointerNull>(Addr)) {
|
|
QualType QualPtrTy = AddrExpr->getType();
|
|
const auto *PtrType = cast<ClangPointerType>(QualPtrTy.getTypePtr());
|
|
QualType QualPointeeTy = PtrType->getPointeeType();
|
|
QualPointeeTy.addVolatile();
|
|
QualType PtrToVolatileTy = ASTCtx.getPointerType(QualPointeeTy);
|
|
AddrExpr = createCast(PtrToVolatileTy, AddrExpr, ASTCtx);
|
|
}
|
|
|
|
using Unary = clang::UnaryOperator;
|
|
return new (ASTCtx) Unary(AddrExpr,
|
|
UnaryOperatorKind::UO_Deref,
|
|
PointeeType,
|
|
VK_LValue,
|
|
OK_Ordinary,
|
|
{},
|
|
false);
|
|
}
|
|
if (auto *Cast = dyn_cast<CastInst>(I)) {
|
|
Value *RHS = Cast->getOperand(0);
|
|
Expr *Result = getParenthesizedExprForValue(RHS);
|
|
LLVMType *RHSTy = Cast->getSrcTy();
|
|
LLVMType *LHSTy = Cast->getDestTy();
|
|
if (RHSTy != LHSTy) {
|
|
revng_assert(RHSTy->isIntOrPtrTy() and LHSTy->isIntOrPtrTy());
|
|
clang::DeclContext &TUDecl = *ASTCtx.getTranslationUnitDecl();
|
|
QualType DestTy = getOrCreateQualType(LHSTy,
|
|
ASTCtx,
|
|
TUDecl,
|
|
TypeDecls,
|
|
FieldDecls);
|
|
CastKind CK;
|
|
switch (Cast->getOpcode()) {
|
|
case Instruction::Trunc:
|
|
case Instruction::ZExt:
|
|
case Instruction::SExt: {
|
|
revng_assert(not RHSTy->isPointerTy() and not LHSTy->isPointerTy());
|
|
/// CK_IntegralCast - A cast between integral types (other than to
|
|
/// boolean). Variously a bitcast, a truncation, a sign-extension,
|
|
/// or a zero-extension.
|
|
/// long l = 5;
|
|
/// (unsigned) i
|
|
/// CAST_OPERATION(IntegralCast)
|
|
CK = CastKind::CK_IntegralCast;
|
|
} break;
|
|
case Instruction::IntToPtr: {
|
|
revng_assert(not RHSTy->isPointerTy() and LHSTy->isPointerTy());
|
|
/// CK_IntegralToPointer - Integral to pointer. A special kind of
|
|
/// reinterpreting conversion. Applies to normal, ObjC, and block
|
|
/// pointers.
|
|
/// (char*) 0x1001aab0
|
|
/// reinterpret_cast<int*>(0)
|
|
/// CAST_OPERATION(IntegralToPointer)
|
|
QualType IntQualType = Result->getType();
|
|
const ClangType *PtrType = DestTy.getTypePtr();
|
|
revng_assert(PtrType->isPointerType());
|
|
uint64_t PtrSize = ASTCtx.getTypeSize(DestTy);
|
|
uint64_t IntegerSize = ASTCtx.getTypeSize(IntQualType);
|
|
revng_assert(PtrSize >= IntegerSize);
|
|
if (PtrSize > IntegerSize)
|
|
Result = createCast(ASTCtx.getUIntPtrType(), Result, ASTCtx);
|
|
CK = CastKind::CK_IntegralToPointer;
|
|
} break;
|
|
case Instruction::PtrToInt: {
|
|
revng_assert(RHSTy->isPointerTy() and not LHSTy->isPointerTy());
|
|
/// CK_PointerToIntegral - Pointer to integral. A special kind of
|
|
/// reinterpreting conversion. Applies to normal, ObjC, and block
|
|
/// pointers.
|
|
/// (intptr_t) "help!"
|
|
/// CAST_OPERATION(PointerToIntegral)
|
|
CK = CastKind::CK_PointerToIntegral;
|
|
} break;
|
|
case Instruction::BitCast: {
|
|
revng_assert(RHSTy->isPointerTy() and LHSTy->isPointerTy());
|
|
/// CK_BitCast - A conversion which causes a bit pattern of one type
|
|
/// to be reinterpreted as a bit pattern of another type. Generally
|
|
/// the operands must have equivalent size and unrelated types.
|
|
///
|
|
/// The pointer conversion char* -> int* is a bitcast. A conversion
|
|
/// from any pointer type to a C pointer type is a bitcast unless
|
|
/// it's actually BaseToDerived or DerivedToBase. A conversion to a
|
|
/// block pointer or ObjC pointer type is a bitcast only if the
|
|
/// operand has the same type kind; otherwise, it's one of the
|
|
/// specialized casts below.
|
|
///
|
|
/// Vector coercions are bitcasts.
|
|
/// CAST_OPERATION(BitCast)
|
|
CK = CastKind::CK_BitCast;
|
|
} break;
|
|
case Instruction::FPTrunc:
|
|
case Instruction::FPExt:
|
|
case Instruction::FPToUI:
|
|
case Instruction::FPToSI:
|
|
case Instruction::UIToFP:
|
|
case Instruction::SIToFP:
|
|
case Instruction::AddrSpaceCast:
|
|
default:
|
|
revng_abort();
|
|
}
|
|
|
|
TypeSourceInfo *TI = ASTCtx.CreateTypeSourceInfo(DestTy);
|
|
Result = CStyleCastExpr::Create(ASTCtx,
|
|
DestTy,
|
|
VK_RValue,
|
|
CK,
|
|
Result,
|
|
nullptr,
|
|
TI,
|
|
{},
|
|
{});
|
|
}
|
|
revng_assert(Result);
|
|
revng_log(ASTBuildLog, "GOT!");
|
|
if (ASTBuildLog.isEnabled())
|
|
Result->dump();
|
|
return Result;
|
|
}
|
|
revng_abort();
|
|
} else if (auto *Arg = dyn_cast<Argument>(V)) {
|
|
llvm::Function *F = Arg->getParent();
|
|
llvm::FunctionType *FType = F->getFunctionType();
|
|
revng_assert(not FType->isVarArg());
|
|
unsigned NumLLVMParams = FType->getNumParams();
|
|
unsigned ArgNo = Arg->getArgNo();
|
|
clang::FunctionDecl *FDecl = FunctionDecls.at(F);
|
|
unsigned DeclNumParams = FDecl->getNumParams();
|
|
revng_assert(NumLLVMParams == DeclNumParams);
|
|
clang::ParmVarDecl *ParamVDecl = FDecl->getParamDecl(ArgNo);
|
|
QualType Type = ParamVDecl->getType();
|
|
DeclRefExpr *Res = new (ASTCtx)
|
|
DeclRefExpr(ParamVDecl, false, Type, VK_LValue, {});
|
|
return Res;
|
|
} else {
|
|
revng_abort();
|
|
}
|
|
}
|
|
|
|
Expr *StmtBuilder::getLiteralFromConstant(Constant *C) {
|
|
if (auto *CD = dyn_cast<ConstantData>(C)) {
|
|
if (auto *CInt = dyn_cast<ConstantInt>(CD)) {
|
|
clang::DeclContext &TUDecl = *ASTCtx.getTranslationUnitDecl();
|
|
QualType LiteralTy = getOrCreateQualType(CInt,
|
|
ASTCtx,
|
|
TUDecl,
|
|
TypeDecls,
|
|
FieldDecls);
|
|
const clang::Type *UnderlyingTy = LiteralTy.getTypePtrOrNull();
|
|
revng_assert(UnderlyingTy != nullptr);
|
|
// Desugar stdint.h typedefs
|
|
UnderlyingTy = UnderlyingTy->getUnqualifiedDesugaredType();
|
|
const BuiltinType *BuiltinTy = cast<BuiltinType>(UnderlyingTy);
|
|
uint64_t ConstValue = CInt->getValue().getZExtValue();
|
|
switch (BuiltinTy->getKind()) {
|
|
case BuiltinType::Bool: {
|
|
QualType IntT = ASTCtx.IntTy;
|
|
QualType BoolTy = getOrCreateBoolQualType(C->getType(), ASTCtx, TypeDecls);
|
|
APInt Const = APInt(ASTCtx.getIntWidth(IntT), ConstValue, true);
|
|
Expr *IntLiteral = IntegerLiteral::Create(ASTCtx, Const, IntT, {});
|
|
return createCast(BoolTy, IntLiteral, ASTCtx);
|
|
}
|
|
case BuiltinType::Char_U:
|
|
case BuiltinType::Char_S:
|
|
case BuiltinType::UChar:
|
|
case BuiltinType::SChar: {
|
|
using CharKind = CharacterLiteral::CharacterKind;
|
|
return new (ASTCtx)
|
|
CharacterLiteral(ConstValue, CharKind::Ascii, ASTCtx.CharTy, {});
|
|
}
|
|
case BuiltinType::UShort: {
|
|
QualType IntT = ASTCtx.UnsignedIntTy;
|
|
QualType ShortT = ASTCtx.UnsignedShortTy;
|
|
APInt Const = APInt(ASTCtx.getIntWidth(IntT), ConstValue);
|
|
Expr *Literal = IntegerLiteral::Create(ASTCtx, Const, IntT, {});
|
|
return createCast(ShortT, Literal, ASTCtx);
|
|
}
|
|
case BuiltinType::Short: {
|
|
QualType IntT = ASTCtx.IntTy;
|
|
QualType ShortT = ASTCtx.ShortTy;
|
|
APInt Const = APInt(ASTCtx.getIntWidth(IntT), ConstValue, true);
|
|
Expr *Literal = IntegerLiteral::Create(ASTCtx, Const, IntT, {});
|
|
return createCast(ShortT, Literal, ASTCtx);
|
|
}
|
|
case BuiltinType::UInt:
|
|
case BuiltinType::ULong:
|
|
case BuiltinType::ULongLong: {
|
|
APInt Const = APInt(ASTCtx.getIntWidth(LiteralTy), ConstValue);
|
|
return IntegerLiteral::Create(ASTCtx, Const, LiteralTy, {});
|
|
}
|
|
case BuiltinType::Int:
|
|
case BuiltinType::Long:
|
|
case BuiltinType::LongLong: {
|
|
APInt Const = APInt(ASTCtx.getIntWidth(LiteralTy), ConstValue, true);
|
|
return IntegerLiteral::Create(ASTCtx, Const, LiteralTy, {});
|
|
}
|
|
case BuiltinType::UInt128: {
|
|
// With LLVM compiled in debug this asserts whenever ConstValue is
|
|
// larger than 64 bits.
|
|
// We don't use 128 instead of 64 because C hasn't 128 bits integer
|
|
// literals.
|
|
APInt Const = APInt(64, ConstValue);
|
|
QualType T = ASTCtx.UnsignedLongLongTy;
|
|
return IntegerLiteral::Create(ASTCtx, Const, T, {});
|
|
}
|
|
case BuiltinType::Int128: {
|
|
// With LLVM compiled in debug this asserts whenever ConstValue is
|
|
// larger than 64 bits.
|
|
// We don't use 128 instead of 64 because C hasn't 128 bits integer
|
|
// literals.
|
|
APInt Const = APInt(64, ConstValue, true);
|
|
QualType T = ASTCtx.LongLongTy;
|
|
return IntegerLiteral::Create(ASTCtx, Const, T, {});
|
|
}
|
|
default:
|
|
revng_abort();
|
|
}
|
|
} else if (isa<ConstantPointerNull>(CD)) {
|
|
QualType UIntPtr = ASTCtx.getUIntPtrType();
|
|
uint64_t UIntPtrSize = ASTCtx.getTypeSize(UIntPtr);
|
|
return IntegerLiteral::Create(ASTCtx,
|
|
APInt::getNullValue(UIntPtrSize),
|
|
UIntPtr,
|
|
{});
|
|
}
|
|
revng_abort();
|
|
}
|
|
if (auto *CE = dyn_cast<ConstantExpr>(C)) {
|
|
Expr *Result = nullptr;
|
|
switch (CE->getOpcode()) {
|
|
case Instruction::Trunc:
|
|
case Instruction::ZExt:
|
|
case Instruction::SExt:
|
|
case Instruction::IntToPtr:
|
|
case Instruction::PtrToInt:
|
|
case Instruction::BitCast: {
|
|
Result = getExprForValue(cast<ConstantInt>(CE->getOperand(0)));
|
|
revng_log(ASTBuildLog, "GOT!");
|
|
revng_assert(Result);
|
|
if (ASTBuildLog.isEnabled())
|
|
Result->dump();
|
|
} break;
|
|
default:
|
|
revng_abort();
|
|
}
|
|
return Result;
|
|
}
|
|
revng_abort();
|
|
}
|
|
|
|
} // namespace IR2AST
|