diff options
Diffstat (limited to 'contrib/llvm/tools/clang/lib/Checker/SValuator.cpp')
-rw-r--r-- | contrib/llvm/tools/clang/lib/Checker/SValuator.cpp | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/contrib/llvm/tools/clang/lib/Checker/SValuator.cpp b/contrib/llvm/tools/clang/lib/Checker/SValuator.cpp deleted file mode 100644 index 273e574..0000000 --- a/contrib/llvm/tools/clang/lib/Checker/SValuator.cpp +++ /dev/null @@ -1,157 +0,0 @@ -// SValuator.cpp - Basic class for all SValuator implementations --*- C++ -*--// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file defines SValuator, the base class for all (complete) SValuator -// implementations. -// -//===----------------------------------------------------------------------===// - -#include "clang/Checker/PathSensitive/SValuator.h" -#include "clang/Checker/PathSensitive/GRState.h" - -using namespace clang; - - -SVal SValuator::EvalBinOp(const GRState *ST, BinaryOperator::Opcode Op, - SVal L, SVal R, QualType T) { - - if (L.isUndef() || R.isUndef()) - return UndefinedVal(); - - if (L.isUnknown() || R.isUnknown()) - return UnknownVal(); - - if (isa<Loc>(L)) { - if (isa<Loc>(R)) - return EvalBinOpLL(ST, Op, cast<Loc>(L), cast<Loc>(R), T); - - return EvalBinOpLN(ST, Op, cast<Loc>(L), cast<NonLoc>(R), T); - } - - if (isa<Loc>(R)) { - // Support pointer arithmetic where the addend is on the left - // and the pointer on the right. - assert(Op == BO_Add); - - // Commute the operands. - return EvalBinOpLN(ST, Op, cast<Loc>(R), cast<NonLoc>(L), T); - } - - return EvalBinOpNN(ST, Op, cast<NonLoc>(L), cast<NonLoc>(R), T); -} - -DefinedOrUnknownSVal SValuator::EvalEQ(const GRState *ST, - DefinedOrUnknownSVal L, - DefinedOrUnknownSVal R) { - return cast<DefinedOrUnknownSVal>(EvalBinOp(ST, BO_EQ, L, R, - ValMgr.getContext().IntTy)); -} - -SVal SValuator::EvalCast(SVal val, QualType castTy, QualType originalTy) { - if (val.isUnknownOrUndef() || castTy == originalTy) - return val; - - ASTContext &C = ValMgr.getContext(); - - // For const casts, just propagate the value. - if (!castTy->isVariableArrayType() && !originalTy->isVariableArrayType()) - if (C.hasSameUnqualifiedType(castTy, originalTy)) - return val; - - // Check for casts to real or complex numbers. We don't handle these at all - // right now. - if (castTy->isFloatingType() || castTy->isAnyComplexType()) - return UnknownVal(); - - // Check for casts from integers to integers. - if (castTy->isIntegerType() && originalTy->isIntegerType()) - return EvalCastNL(cast<NonLoc>(val), castTy); - - // Check for casts from pointers to integers. - if (castTy->isIntegerType() && Loc::IsLocType(originalTy)) - return EvalCastL(cast<Loc>(val), castTy); - - // Check for casts from integers to pointers. - if (Loc::IsLocType(castTy) && originalTy->isIntegerType()) { - if (nonloc::LocAsInteger *LV = dyn_cast<nonloc::LocAsInteger>(&val)) { - if (const MemRegion *R = LV->getLoc().getAsRegion()) { - StoreManager &storeMgr = ValMgr.getStateManager().getStoreManager(); - R = storeMgr.CastRegion(R, castTy); - return R ? SVal(loc::MemRegionVal(R)) : UnknownVal(); - } - return LV->getLoc(); - } - goto DispatchCast; - } - - // Just pass through function and block pointers. - if (originalTy->isBlockPointerType() || originalTy->isFunctionPointerType()) { - assert(Loc::IsLocType(castTy)); - return val; - } - - // Check for casts from array type to another type. - if (originalTy->isArrayType()) { - // We will always decay to a pointer. - val = ValMgr.getStateManager().ArrayToPointer(cast<Loc>(val)); - - // Are we casting from an array to a pointer? If so just pass on - // the decayed value. - if (castTy->isPointerType()) - return val; - - // Are we casting from an array to an integer? If so, cast the decayed - // pointer value to an integer. - assert(castTy->isIntegerType()); - - // FIXME: Keep these here for now in case we decide soon that we - // need the original decayed type. - // QualType elemTy = cast<ArrayType>(originalTy)->getElementType(); - // QualType pointerTy = C.getPointerType(elemTy); - return EvalCastL(cast<Loc>(val), castTy); - } - - // Check for casts from a region to a specific type. - if (const MemRegion *R = val.getAsRegion()) { - // FIXME: We should handle the case where we strip off view layers to get - // to a desugared type. - - assert(Loc::IsLocType(castTy)); - // We get a symbolic function pointer for a dereference of a function - // pointer, but it is of function type. Example: - - // struct FPRec { - // void (*my_func)(int * x); - // }; - // - // int bar(int x); - // - // int f1_a(struct FPRec* foo) { - // int x; - // (*foo->my_func)(&x); - // return bar(x)+1; // no-warning - // } - - assert(Loc::IsLocType(originalTy) || originalTy->isFunctionType() || - originalTy->isBlockPointerType()); - - StoreManager &storeMgr = ValMgr.getStateManager().getStoreManager(); - - // Delegate to store manager to get the result of casting a region to a - // different type. If the MemRegion* returned is NULL, this expression - // evaluates to UnknownVal. - R = storeMgr.CastRegion(R, castTy); - return R ? SVal(loc::MemRegionVal(R)) : UnknownVal(); - } - -DispatchCast: - // All other cases. - return isa<Loc>(val) ? EvalCastL(cast<Loc>(val), castTy) - : EvalCastNL(cast<NonLoc>(val), castTy); -} |