This patch collects all analysis context data into a new class

AnalysisContext.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@77563 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 73 insertions, 0 deletions

diff --git a/lib/Analysis/AnalysisContext.cpp b/lib/Analysis/AnalysisContext.cpp
new file mode 100644
index 0000000000..ba1b5ae23f
--- /dev/null
+++ b/lib/Analysis/AnalysisContext.cpp
@@ -0,0 +1,73 @@
+//== AnalysisContext.cpp - Analysis context for Path Sens analysis -*- 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 AnalysisContext, a class that manages the analysis context
+// data for path sensitive analysis.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Analysis/PathSensitive/AnalysisContext.h"
+#include "clang/Analysis/Analyses/LiveVariables.h"
+#include "clang/Analysis/CFG.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/DeclObjC.h"
+#include "clang/AST/ParentMap.h"
+
+using namespace clang;
+
+AnalysisContext::~AnalysisContext() {
+  delete cfg;
+  delete liveness;
+  delete PM;
+}
+
+Stmt *AnalysisContext::getBody() {
+  if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
+    return FD->getBody();
+  else if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D))
+    return MD->getBody();
+
+  assert(0 && "unknown code decl");
+}
+
+CFG *AnalysisContext::getCFG() {
+  if (!cfg) 
+    cfg = CFG::buildCFG(getBody(), &D->getASTContext());
+  return cfg;
+}
+
+ParentMap &AnalysisContext::getParentMap() {
+  if (!PM) 
+    PM = new ParentMap(getBody());
+  return *PM;
+}
+
+LiveVariables *AnalysisContext::getLiveVariables() {
+  if (!liveness) {
+    CFG *c = getCFG();
+    if (!c)
+      return 0;
+    
+    liveness = new LiveVariables(D->getASTContext(), *c);
+    liveness->runOnCFG(*c);
+    liveness->runOnAllBlocks(*c, 0, true);
+  }
+  
+  return liveness;
+}
+
+AnalysisContext *AnalysisContextManager::getContext(Decl *D) {
+  iterator I = Contexts.find(D);
+  if (I != Contexts.end())
+    return &(I->second);
+
+  AnalysisContext &Ctx = Contexts[D];
+  Ctx.setDecl(D);
+  return &Ctx;
+}