vendor/clang/clang-r84119

1 files changed, 75 insertions, 0 deletions

diff --git a/lib/Analysis/CallInliner.cpp b/lib/Analysis/CallInliner.cpp
new file mode 100644
index 000000000000..cca8584a61fa
--- /dev/null
+++ b/lib/Analysis/CallInliner.cpp
@@ -0,0 +1,75 @@
+//===--- CallInliner.cpp - Transfer function that inlines callee ----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file implements the callee inlining transfer function.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Analysis/PathSensitive/GRExprEngine.h"
+#include "clang/Analysis/PathSensitive/GRTransferFuncs.h"
+
+using namespace clang;
+
+namespace {
+  
+class VISIBILITY_HIDDEN CallInliner : public GRTransferFuncs {
+  ASTContext &Ctx;
+public:
+  CallInliner(ASTContext &ctx) : Ctx(ctx) {}
+
+  void EvalCall(ExplodedNodeSet& Dst, GRExprEngine& Engine,
+                GRStmtNodeBuilder& Builder, CallExpr* CE, SVal L,
+                ExplodedNode* Pred);
+  
+};
+
+}
+
+void CallInliner::EvalCall(ExplodedNodeSet& Dst, GRExprEngine& Engine,
+                           GRStmtNodeBuilder& Builder, CallExpr* CE, SVal L,
+                           ExplodedNode* Pred) {
+  FunctionDecl const *FD = L.getAsFunctionDecl();
+  if (!FD)
+    return; // GRExprEngine is responsible for the autotransition.
+
+  // Make a new LocationContext.
+  StackFrameContext const *LocCtx =
+  Engine.getAnalysisManager().getStackFrame(FD, Pred->getLocationContext(), CE);
+
+  CFGBlock const *Entry = &(LocCtx->getCFG()->getEntry());
+
+  assert (Entry->empty() && "Entry block must be empty.");
+
+  assert (Entry->succ_size() == 1 && "Entry block must have 1 successor.");
+
+  // Get the solitary successor.
+  CFGBlock const *SuccB = *(Entry->succ_begin());
+
+  // Construct an edge representing the starting location in the function.
+  BlockEdge Loc(Entry, SuccB, LocCtx);
+
+  GRState const *state = Builder.GetState(Pred);  
+  state = Engine.getStoreManager().EnterStackFrame(state, LocCtx);
+
+  bool isNew;
+  ExplodedNode *SuccN = Engine.getGraph().getNode(Loc, state, &isNew);
+  SuccN->addPredecessor(Pred, Engine.getGraph());
+
+  Builder.Deferred.erase(Pred);
+
+  // This is a hack. We really should not use the GRStmtNodeBuilder.
+  if (isNew)
+    Builder.getWorkList()->Enqueue(SuccN);
+
+  Builder.HasGeneratedNode = true;
+}
+  
+GRTransferFuncs *clang::CreateCallInliner(ASTContext &ctx) {
+  return new CallInliner(ctx);
+}