src/share/vm/opto/machnode.cpp

@@ -714,10 +714,15 @@
 
 //------------------------------Registers--------------------------------------
 const RegMask &MachCallNode::in_RegMask(uint idx) const {
   // Values in the domain use the users calling convention, embodied in the
   // _in_rms array of RegMasks.
+  if (entry_point() == NULL && idx == TypeFunc::Parms) {
+    // Null entry point is a special cast where the target of the call
+    // is in a register.
+    return MachNode::in_RegMask(idx);
+  }
   if (idx < tf()->domain_sig()->cnt()) {
     return _in_rms[idx];
   }
   if (idx == mach_constant_base_node_input()) {
     return MachConstantBaseNode::static_out_RegMask();