diff --git a/lib/Transforms/InstCombine/InstCombineCalls.cpp b/lib/Transforms/InstCombine/InstCombineCalls.cpp
index a87fbbd9895..c3c13ae362f 100644
--- a/lib/Transforms/InstCombine/InstCombineCalls.cpp
+++ b/lib/Transforms/InstCombine/InstCombineCalls.cpp
@@ -1105,21 +1105,12 @@ bool InstCombiner::transformConstExprCastCall(CallSite CS) {
     if (FT->isVarArg()!=cast<FunctionType>(APTy->getElementType())->isVarArg())
       return false;
   }
-      
-  if (FT->getNumParams() < NumActualArgs && FT->isVarArg() &&
-      !CallerPAL.isEmpty())
-    // In this case we have more arguments than the new function type, but we
-    // won't be dropping them.  Check that these extra arguments have attributes
-    // that are compatible with being a vararg call argument.
-    for (unsigned i = CallerPAL.getNumSlots(); i; --i) {
-      if (CallerPAL.getSlot(i - 1).Index <= FT->getNumParams())
-        break;
-      Attributes PAttrs = CallerPAL.getSlot(i - 1).Attrs;
-      if (PAttrs & Attribute::VarArgsIncompatible)
-        return false;
-    }
 
-  
+  // If we're casting varargs to non-varargs, that may not be allowable
+  // under the ABI, so conservatively don't do anything.
+  if (FT->getNumParams() < NumActualArgs && FT->isVarArg())
+    return false;
+
   // Okay, we decided that this is a safe thing to do: go ahead and start
   // inserting cast instructions as necessary.
   std::vector<Value*> Args;
diff --git a/test/Transforms/InstCombine/2008-01-06-BitCastAttributes.ll b/test/Transforms/InstCombine/2008-01-06-BitCastAttributes.ll
deleted file mode 100644
index 23b606779e6..00000000000
--- a/test/Transforms/InstCombine/2008-01-06-BitCastAttributes.ll
+++ /dev/null
@@ -1,23 +0,0 @@
-; Ignore stderr, we expect warnings there
-; RUN: opt < %s -instcombine 2> /dev/null -S | not grep bitcast
-
-define void @a() {
-	ret void
-}
-
-define signext i32 @b(i32* inreg  %x)   {
-	ret i32 0
-}
-
-define void @c(...) {
-	ret void
-}
-
-define void @g(i32* %y) {
-	call void bitcast (void ()* @a to void (i32*)*)( i32* noalias  %y )
-	call <2 x i32> bitcast (i32 (i32*)* @b to <2 x i32> (i32*)*)( i32* inreg  null )		; <<2 x i32>>:1 [#uses=0]
-	%x = call i64 bitcast (i32 (i32*)* @b to i64 (i32)*)( i32 0 )		; <i64> [#uses=0]
-	call void bitcast (void (...)* @c to void (i32)*)( i32 0 )
-	call void bitcast (void (...)* @c to void (i32)*)( i32 zeroext  0 )
-	ret void
-}
diff --git a/test/Transforms/InstCombine/call.ll b/test/Transforms/InstCombine/call.ll
index 96ec420eaa8..ca36484bc25 100644
--- a/test/Transforms/InstCombine/call.ll
+++ b/test/Transforms/InstCombine/call.ll
@@ -30,20 +30,6 @@ define i32 @test2(i32 %A) {
 }
 
 
-; Resolving this should insert a cast from sbyte to int, following the C 
-; promotion rules.
-define void @test3a(i8, ...) {unreachable }
-
-define void @test3(i8 %A, i8 %B) {
-        call void bitcast (void (i8, ...)* @test3a to void (i8, i8)*)( i8 %A, i8 %B 
-)
-        ret void
-; CHECK: %1 = zext i8 %B to i32
-; CHECK: call void (i8, ...)* @test3a(i8 %A, i32 %1)
-; CHECK: ret void
-}
-
-
 ; test conversion of return value...
 define i8 @test4a() {
         ret i8 0