Fix deoptimization from %_MathPow. Do not prepare the stack for a C...

src/ia32/lithium-ia32.cc

 // Copyright 2010 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1585 matching lines @@
   ASSERT(instr->representation().IsDouble());
   // We call a C function for double power. It can't trigger a GC.
   // We need to use fixed result register for the call.
   Representation exponent_type = instr->right()->representation();
   ASSERT(instr->left()->representation().IsDouble());
   LOperand* left = UseFixedDouble(instr->left(), xmm1);
   LOperand* right = exponent_type.IsDouble() ?
       UseFixedDouble(instr->right(), xmm2) :
       UseFixed(instr->right(), eax);
   LPower* result = new LPower(left, right);
-  return MarkAsCall(DefineFixedDouble(result, xmm1), instr,
+  return MarkAsCall(DefineFixedDouble(result, xmm3), instr,
                     CAN_DEOPTIMIZE_EAGERLY);
 }
 
 
 LInstruction* LChunkBuilder::DoCompare(HCompare* instr) {
   Token::Value op = instr->token();
   if (instr->left()->representation().IsInteger32()) {
     ASSERT(instr->right()->representation().IsInteger32());
     LOperand* left = UseRegisterAtStart(instr->left());
     LOperand* right = UseOrConstantAtStart(instr->right());
@@ skipping 514 matching lines @@
 void LPointerMap::PrintTo(StringStream* stream) const {
   stream->Add("{");
   for (int i = 0; i < pointer_operands_.length(); ++i) {
     if (i != 0) stream->Add(";");
     pointer_operands_[i]->PrintTo(stream);
   }
   stream->Add("} @%d", position());
 }
 
 } }  // namespace v8::internal