Remove BlockDeclRefExpr and introduce a bit on DeclRefExpr to

track whether the referenced declaration comes from an enclosing
local context.  I'm amenable to suggestions about the exact meaning
of this bit.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152491 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 11 insertions, 28 deletions

diff --git a/lib/Analysis/AnalysisDeclContext.cpp b/lib/Analysis/AnalysisDeclContext.cpp
index cbb08fd3da..1020898e60 100644
--- a/lib/Analysis/AnalysisDeclContext.cpp
+++ b/lib/Analysis/AnalysisDeclContext.cpp
@@ -362,20 +362,16 @@ public:
           flag = 1;
           BEVals.push_back(VD, BC);
         }
+      } else if (DR->refersToEnclosingLocal()) {
+        unsigned &flag = Visited[VD];
+        if (!flag) {
+          flag = 1;
+          if (IsTrackedDecl(VD))
+            BEVals.push_back(VD, BC);
+        }
       }
   }
 
-  void VisitBlockDeclRefExpr(BlockDeclRefExpr *DR) {
-    if (const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl())) {
-      unsigned &flag = Visited[VD];
-      if (!flag) {
-        flag = 1;
-        if (IsTrackedDecl(VD))
-          BEVals.push_back(VD, BC);
-      }
-    }
-  }
-
   void VisitBlockExpr(BlockExpr *BR) {
     // Blocks containing blocks can transitively capture more variables.
     IgnoredContexts.insert(BR->getBlockDecl());
diff --git a/lib/Analysis/PseudoConstantAnalysis.cpp b/lib/Analysis/PseudoConstantAnalysis.cpp
index 8f24c432b1..c8b491a216 100644
--- a/lib/Analysis/PseudoConstantAnalysis.cpp
+++ b/lib/Analysis/PseudoConstantAnalysis.cpp
@@ -68,8 +68,6 @@ bool PseudoConstantAnalysis::wasReferenced(const VarDecl *VD) {
 const Decl *PseudoConstantAnalysis::getDecl(const Expr *E) {
   if (const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(E))
     return DR->getDecl();
-  else if (const BlockDeclRefExpr *BDR = dyn_cast<BlockDeclRefExpr>(E))
-    return BDR->getDecl();
   else
     return 0;
 }
@@ -198,18 +196,7 @@ void PseudoConstantAnalysis::RunAnalysis() {
       break;
     }
 
-    // Case 4: Block variable references
-    case Stmt::BlockDeclRefExprClass: {
-      const BlockDeclRefExpr *BDR = cast<BlockDeclRefExpr>(Head);
-      if (const VarDecl *VD = dyn_cast<VarDecl>(BDR->getDecl())) {
-        // Add the Decl to the used list
-        UsedVars->insert(VD);
-        continue;
-      }
-      break;
-    }
-
-    // Case 5: Variable references
+    // Case 4: Variable references
     case Stmt::DeclRefExprClass: {
       const DeclRefExpr *DR = cast<DeclRefExpr>(Head);
       if (const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl())) {
@@ -220,7 +207,7 @@ void PseudoConstantAnalysis::RunAnalysis() {
       break;
     }
 
-    // Case 6: Block expressions
+    // Case 5: Block expressions
     case Stmt::BlockExprClass: {
       const BlockExpr *B = cast<BlockExpr>(Head);
       // Add the body of the block to the list
diff --git a/lib/Analysis/ThreadSafety.cpp b/lib/Analysis/ThreadSafety.cpp
index b2f89cce6b..2f7e794c2b 100644
--- a/lib/Analysis/ThreadSafety.cpp
+++ b/lib/Analysis/ThreadSafety.cpp
@@ -1040,7 +1040,7 @@ void BuildLockset::addLocksToSet(LockKind LK, AttrType *Attr,
       addLock(Mutex, LockData(ExpLocation, LK));
       if (isScopedVar) {
         // For scoped lockable vars, map this var to its underlying mutex.
-        DeclRefExpr DRE(VD, VD->getType(), VK_LValue, VD->getLocation());
+        DeclRefExpr DRE(VD, false, VD->getType(), VK_LValue, VD->getLocation());
         MutexID SMutex(&DRE, 0, 0);
         addLock(SMutex, LockData(VD->getLocation(), LK, Mutex));
       }
@@ -1656,7 +1656,7 @@ void ThreadSafetyAnalyzer::runAnalysis(AnalysisDeclContext &AC) {
 
           // Create a dummy expression,
           VarDecl *VD = const_cast<VarDecl*>(AD->getVarDecl());
-          DeclRefExpr DRE(VD, VD->getType(), VK_LValue,
+          DeclRefExpr DRE(VD, false, VD->getType(), VK_LValue,
                           AD->getTriggerStmt()->getLocEnd());
           LocksetBuilder.handleCall(&DRE, DD);
           break;