1 files changed, 0 insertions, 139 deletions
diff --git a/contrib/llvm/tools/clang/lib/StaticAnalyzer/Checkers/BuiltinFunctionChecker.cpp b/contrib/llvm/tools/clang/lib/StaticAnalyzer/Checkers/BuiltinFunctionChecker.cpp
deleted file mode 100644
index 10594e331cbe..000000000000
--- a/contrib/llvm/tools/clang/lib/StaticAnalyzer/Checkers/BuiltinFunctionChecker.cpp
+++ /dev/null
@@ -1,139 +0,0 @@
-//=== BuiltinFunctionChecker.cpp --------------------------------*- C++ -*-===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-//
-// This checker evaluates clang builtin functions.
-//
-//===----------------------------------------------------------------------===//
-
-#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
-#include "clang/Basic/Builtins.h"
-#include "clang/StaticAnalyzer/Core/Checker.h"
-#include "clang/StaticAnalyzer/Core/CheckerManager.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
-
-using namespace clang;
-using namespace ento;
-
-namespace {
-
-class BuiltinFunctionChecker : public Checker<eval::Call> {
-public:
-  bool evalCall(const CallEvent &Call, CheckerContext &C) const;
-};
-
-}
-
-bool BuiltinFunctionChecker::evalCall(const CallEvent &Call,
-                                      CheckerContext &C) const {
-  ProgramStateRef state = C.getState();
-  const auto *FD = dyn_cast_or_null<FunctionDecl>(Call.getDecl());
-  if (!FD)
-    return false;
-
-  const LocationContext *LCtx = C.getLocationContext();
-  const Expr *CE = Call.getOriginExpr();
-
-  switch (FD->getBuiltinID()) {
-  default:
-    return false;
-
-  case Builtin::BI__builtin_assume: {
-    assert (Call.getNumArgs() > 0);
-    SVal Arg = Call.getArgSVal(0);
-    if (Arg.isUndef())
-      return true; // Return true to model purity.
-
-    state = state->assume(Arg.castAs<DefinedOrUnknownSVal>(), true);
-    // FIXME: do we want to warn here? Not right now. The most reports might
-    // come from infeasible paths, thus being false positives.
-    if (!state) {
-      C.generateSink(C.getState(), C.getPredecessor());
-      return true;
-    }
-
-    C.addTransition(state);
-    return true;
-  }
-
-  case Builtin::BI__builtin_unpredictable:
-  case Builtin::BI__builtin_expect:
-  case Builtin::BI__builtin_assume_aligned:
-  case Builtin::BI__builtin_addressof: {
-    // For __builtin_unpredictable, __builtin_expect, and
-    // __builtin_assume_aligned, just return the value of the subexpression.
-    // __builtin_addressof is going from a reference to a pointer, but those
-    // are represented the same way in the analyzer.
-    assert (Call.getNumArgs() > 0);
-    SVal Arg = Call.getArgSVal(0);
-    C.addTransition(state->BindExpr(CE, LCtx, Arg));
-    return true;
-  }
-
-  case Builtin::BI__builtin_alloca_with_align:
-  case Builtin::BI__builtin_alloca: {
-    // FIXME: Refactor into StoreManager itself?
-    MemRegionManager& RM = C.getStoreManager().getRegionManager();
-    const AllocaRegion* R =
-      RM.getAllocaRegion(CE, C.blockCount(), C.getLocationContext());
-
-    // Set the extent of the region in bytes. This enables us to use the
-    // SVal of the argument directly. If we save the extent in bits, we
-    // cannot represent values like symbol*8.
-    auto Size = Call.getArgSVal(0);
-    if (Size.isUndef())
-      return true; // Return true to model purity.
-
-    SValBuilder& svalBuilder = C.getSValBuilder();
-    DefinedOrUnknownSVal Extent = R->getExtent(svalBuilder);
-    DefinedOrUnknownSVal extentMatchesSizeArg =
-      svalBuilder.evalEQ(state, Extent, Size.castAs<DefinedOrUnknownSVal>());
-    state = state->assume(extentMatchesSizeArg, true);
-    assert(state && "The region should not have any previous constraints");
-
-    C.addTransition(state->BindExpr(CE, LCtx, loc::MemRegionVal(R)));
-    return true;
-  }
-
-  case Builtin::BI__builtin_dynamic_object_size:
-  case Builtin::BI__builtin_object_size:
-  case Builtin::BI__builtin_constant_p: {
-    // This must be resolvable at compile time, so we defer to the constant
-    // evaluator for a value.
-    SValBuilder &SVB = C.getSValBuilder();
-    SVal V = UnknownVal();
-    Expr::EvalResult EVResult;
-    if (CE->EvaluateAsInt(EVResult, C.getASTContext(), Expr::SE_NoSideEffects)) {
-      // Make sure the result has the correct type.
-      llvm::APSInt Result = EVResult.Val.getInt();
-      BasicValueFactory &BVF = SVB.getBasicValueFactory();
-      BVF.getAPSIntType(CE->getType()).apply(Result);
-      V = SVB.makeIntVal(Result);
-    }
-
-    if (FD->getBuiltinID() == Builtin::BI__builtin_constant_p) {
-      // If we didn't manage to figure out if the value is constant or not,
-      // it is safe to assume that it's not constant and unsafe to assume
-      // that it's constant.
-      if (V.isUnknown())
-        V = SVB.makeIntVal(0, CE->getType());
-    }
-
-    C.addTransition(state->BindExpr(CE, LCtx, V));
-    return true;
-  }
-  }
-}
-
-void ento::registerBuiltinFunctionChecker(CheckerManager &mgr) {
-  mgr.registerChecker<BuiltinFunctionChecker>();
-}
-
-bool ento::shouldRegisterBuiltinFunctionChecker(const LangOptions &LO) {
-  return true;
-}