X87: fix one GC issue.

src/x87/lithium-codegen-x87.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 4046 matching lines @@
   __ fstp_d(FieldOperand(temp_result, HeapNumber::kValueOffset));
 
   {
     // Preserve the value of all registers.
     PushSafepointRegistersScope scope(this);
 
     __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
     __ push(temp_result);
     __ CallRuntimeSaveDoubles(Runtime::kMathSqrtRT);
     RecordSafepointWithRegisters(
-        instr->pointer_map(), 0, Safepoint::kNoLazyDeopt);
+        instr->pointer_map(), 1, Safepoint::kNoLazyDeopt);
     __ StoreToSafepointRegisterSlot(temp_result, eax);
   }
   X87PrepareToWrite(result_reg);
   // return value of MathExpRT is Smi or Heap Number.
   __ JumpIfSmi(temp_result, &smi);
   // Heap number(double)
   __ fld_d(FieldOperand(temp_result, HeapNumber::kValueOffset));
   __ jmp(&finish);
   // SMI
   __ bind(&smi);
@@ skipping 193 matching lines @@
   X87LoadForUsage(input);
   __ fstp_d(FieldOperand(temp_result, HeapNumber::kValueOffset));
 
   {
     // Preserve the value of all registers.
     PushSafepointRegistersScope scope(this);
 
     __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
     __ push(temp_result);
     __ CallRuntimeSaveDoubles(Runtime::kMathExpRT);
-    RecordSafepointWithRegisters(instr->pointer_map(), 0,
+    RecordSafepointWithRegisters(instr->pointer_map(), 1,
                                  Safepoint::kNoLazyDeopt);
     __ StoreToSafepointRegisterSlot(temp_result, eax);
   }
   X87PrepareToWrite(result_reg);
   // return value of MathExpRT is Smi or Heap Number.
   __ JumpIfSmi(temp_result, &smi);
   // Heap number(double)
   __ fld_d(FieldOperand(temp_result, HeapNumber::kValueOffset));
   __ jmp(&finish);
   // SMI
@@ skipping 2005 matching lines @@
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X87