[llvm-commits] [llvm] r50705 - /llvm/branches/non-call-eh/include/llvm/Support/CFG.h

[Nick Lewycky]

Author: nicholas
Date: Mon May  5 23:00:56 2008
New Revision: 50705

URL: http://llvm.org/viewvc/llvm-project?rev=50705&view=rev
Log:
Create isUnwindEdge methods on the iterators.

Modified:
    llvm/branches/non-call-eh/include/llvm/Support/CFG.h

Modified: llvm/branches/non-call-eh/include/llvm/Support/CFG.h
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/non-call-eh/include/llvm/Support/CFG.h?rev=50705&r1=50704&r2=50705&view=diff

==============================================================================
--- llvm/branches/non-call-eh/include/llvm/Support/CFG.h (original)
+++ llvm/branches/non-call-eh/include/llvm/Support/CFG.h Mon May  5 23:00:56 2008
@@ -48,6 +48,13 @@
   }
   inline PredIterator(_Ptr *bb, bool) : It(bb->use_end()) {}
 
+  /// isUnwindEdge - This is used to determine whether this predecessor is a
+  /// exception edge.
+  bool isUnwindEdge() const {
+    assert(!It.atEnd() && "pred_iterator out of range!");
+    return isa<BasicBlock>(*It);
+  }
+
   inline bool operator==(const _Self& x) const { return It == x.It; }
   inline bool operator!=(const _Self& x) const { return !operator==(x); }
 
@@ -120,14 +127,20 @@
   /// operate on terminator instructions directly.
   unsigned getSuccessorIndex() const { return idx; }
 
+  /// isUnwindEdge - This is used to determine whether this successor is a
+  /// exception edge.
+  bool isUnwindEdge() const {
+    return idx == Term->getNumSuccessors();
+  }
+
   inline bool operator==(const _Self& x) const { return idx == x.idx; }
   inline bool operator!=(const _Self& x) const { return !operator==(x); }
 
   inline pointer operator*() const {
-    if (idx == Term->getNumSuccessors())
+    if (isUnwindEdge())
       return Term->getParent()->getUnwindDest();
-
-    return Term->getSuccessor(idx);
+    else
+      return Term->getSuccessor(idx);
   }
   inline pointer operator->() const { return operator*(); }