Revert "VM: New calling convention for generated code."

runtime/vm/intermediate_language_ia32.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_IA32.
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/dart_entry.h"
@@ skipping 6563 matching lines @@
         zone, kNumInputs, kNumTemps, LocationSummary::kNoCall);
 
   summary->set_in(0, Location::RequiresRegister());
   summary->set_temp(0, Location::RequiresRegister());
 
   return summary;
 }
 
 
 void IndirectGotoInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
-  Register target_reg = locs()->temp_slot(0)->reg();
+  Register target_address_reg = locs()->temp_slot(0)->reg();
 
-  // Load code object from frame.
-  __ movl(target_reg, Address(EBP, kPcMarkerSlotFromFp * kWordSize));
-  // Load instructions entry point.
-  __ movl(target_reg, FieldAddress(target_reg, Code::entry_point_offset()));
+  // Load from [current frame pointer] + kPcMarkerSlotFromFp.
+  __ movl(target_address_reg, Address(EBP, kPcMarkerSlotFromFp * kWordSize));
 
   // Add the offset.
   Register offset_reg = locs()->in(0).reg();
   if (offset()->definition()->representation() == kTagged) {
     __ SmiUntag(offset_reg);
   }
-  __ addl(target_reg, offset_reg);
+  __ addl(target_address_reg, offset_reg);
 
   // Jump to the absolute address.
-  __ jmp(target_reg);
+  __ jmp(target_address_reg);
 }
 
 
 LocationSummary* StrictCompareInstr::MakeLocationSummary(Zone* zone,
                                                          bool opt) const {
   const intptr_t kNumInputs = 2;
   const intptr_t kNumTemps = 0;
   if (needs_number_check()) {
     LocationSummary* locs = new(zone) LocationSummary(
         zone, kNumInputs, kNumTemps, LocationSummary::kCall);
@@ skipping 260 matching lines @@
   __ Drop(1);
   __ popl(result);
 }
 
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_IA32