back out r101423 and r101397, they break llvm-gcc self-host on darwin10

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101434 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 5 deletions

diff --git a/include/llvm/Support/CallSite.h b/include/llvm/Support/CallSite.h
index 7667ba03e3..0650b61fbc 100644
--- a/include/llvm/Support/CallSite.h
+++ b/include/llvm/Support/CallSite.h
@@ -255,21 +255,27 @@ public:
 private:
   /// Returns the operand number of the first argument
   unsigned getArgumentOffset() const {
+    if (isCall())
+      return 1; // Skip Function (ATM)
+    else
       return 0; // Args are at the front
   }
 
   unsigned getArgumentEndOffset() const {
     if (isCall())
-      return 1; // Skip Function
+      return 0; // Unchanged (ATM)
     else
       return 3; // Skip BB, BB, Function
   }
 
   IterTy getCallee() const {
-    // FIXME: this is slow, since we do not have the fast versions
-		// of the op_*() functions here. See CallSite::getCallee.
-		//
-    return arg_end();
+      // FIXME: this is slow, since we do not have the fast versions
+      // of the op_*() functions here. See CallSite::getCallee.
+      //
+    if (isCall())
+      return getInstruction()->op_begin(); // Unchanged (ATM)
+    else
+      return getInstruction()->op_end() - 3; // Skip BB, BB, Function
   }
 };