Revert "Add a workaround to the problem where the amd64 JIT would mak…

…e all calls as register indirect."

This reverts commit 2aaa79a.

Revert this as it breaks for calls to native code with a non 32bit address.

lib/Target/X86/X86ISelLowering.cpp

@@ -3046,17 +3046,6 @@ X86TargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
     // through a register, since the call instruction's 32-bit
     // pc-relative offset may not be large enough to hold the whole
     // address.
-
-    //
-    // This is a mono specific hack to force llvm to generate direct calls even if
-    // the code model is Large.
-    //
-    if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
-      unsigned char OpFlags = 0;
-      const GlobalValue *GV = G->getGlobal();
-      Callee = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(),
-                                          G->getOffset(), OpFlags);
-    }
   } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
     // If the callee is a GlobalAddress node (quite common, every direct call
     // is) turn it into a TargetGlobalAddress node so that legalize doesn't hack