ARM: Reduce amount of code generated for LoadIC_Megamorphic....

src/arm/assembler-arm.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 2390 matching lines @@
 }
 
 
 bool Assembler::ImmediateFitsAddrMode1Instruction(int32_t imm32) {
   uint32_t dummy1;
   uint32_t dummy2;
   return fits_shifter(imm32, &dummy1, &dummy2, NULL);
 }
 
 
+int Assembler::NumRegistersInRegList(RegList list) {
+  ASSERT((list & ((1 << kNumRegisters) - 1)) == list);
+  ASSERT(static_cast<size_t>(kNumRegisters) <= sizeof(RegList) * 8);
+  int numregs = 0;
+  for (int i = 0; i < kNumRegisters; i++) {
+    if (list & (1 << i)) {
+      numregs++;
+    }
+  }
+  return numregs;
+}
+
+
 // Debugging.
 void Assembler::RecordJSReturn() {
   positions_recorder()->WriteRecordedPositions();
   CheckBuffer();
   RecordRelocInfo(RelocInfo::JS_RETURN);
 }
 
 
 void Assembler::RecordDebugBreakSlot() {
   positions_recorder()->WriteRecordedPositions();
@@ skipping 232 matching lines @@
 
   // Since a constant pool was just emitted, move the check offset forward by
   // the standard interval.
   next_buffer_check_ = pc_offset() + kCheckPoolInterval;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM