83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
//===--- CallInliner.cpp - Transfer function that inlines callee ----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the callee inlining transfer function.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Analysis/PathSensitive/CheckerVisitor.h"
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#include "clang/Analysis/PathSensitive/GRState.h"
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#include "clang/Analysis/LocalCheckers.h"
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using namespace clang;
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namespace {
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class CallInliner : public Checker {
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public:
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static void *getTag() {
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static int x;
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return &x;
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}
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virtual bool EvalCallExpr(CheckerContext &C, const CallExpr *CE);
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};
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}
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void clang::RegisterCallInliner(GRExprEngine &Eng) {
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Eng.registerCheck(new CallInliner());
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}
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bool CallInliner::EvalCallExpr(CheckerContext &C, const CallExpr *CE) {
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const GRState *state = C.getState();
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const Expr *Callee = CE->getCallee();
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SVal L = state->getSVal(Callee);
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const FunctionDecl *FD = L.getAsFunctionDecl();
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if (!FD)
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return false;
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if (!FD->isThisDeclarationADefinition())
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return false;
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// Make a new LocationContext.
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const StackFrameContext *LocCtx = C.getAnalysisManager().getStackFrame(FD,
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C.getPredecessor()->getLocationContext(), CE);
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CFGBlock const *Entry = &(LocCtx->getCFG()->getEntry());
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assert (Entry->empty() && "Entry block must be empty.");
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assert (Entry->succ_size() == 1 && "Entry block must have 1 successor.");
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// Get the solitary successor.
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CFGBlock const *SuccB = *(Entry->succ_begin());
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// Construct an edge representing the starting location in the function.
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BlockEdge Loc(Entry, SuccB, LocCtx);
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state = C.getStoreManager().EnterStackFrame(state, LocCtx);
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// This is a hack. We really should not use the GRStmtNodeBuilder.
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bool isNew;
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GRExprEngine &Eng = C.getEngine();
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ExplodedNode *Pred = C.getPredecessor();
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GRStmtNodeBuilder &Builder = C.getNodeBuilder();
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ExplodedNode *SuccN = Eng.getGraph().getNode(Loc, state, &isNew);
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SuccN->addPredecessor(Pred, Eng.getGraph());
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C.getNodeBuilder().Deferred.erase(Pred);
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if (isNew)
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Builder.getWorkList()->Enqueue(SuccN);
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Builder.HasGeneratedNode = true;
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return true;
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}
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