Fix trigonometric intrinsics: if allocation fails remember to release the loaded value on FPU stack.

runtime/vm/assembler_ia32.h

 // Copyright (c) 2012, 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.
 
 #ifndef VM_ASSEMBLER_IA32_H_
 #define VM_ASSEMBLER_IA32_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_ia32.h directly; use assembler.h instead.
 #endif
@@ skipping 384 matching lines @@
 
   void fnstcw(const Address& dst);
   void fldcw(const Address& src);
 
   void fistpl(const Address& dst);
   void fistps(const Address& dst);
   void fildl(const Address& src);
   void filds(const Address& src);
 
   void fincstp();
-  void ffree(const Immediate& index);
+  void ffree(intptr_t value);
 
   void fsin();
   void fcos();
   void fptan();
 
   void xchgl(Register dst, Register src);
 
   void cmpl(Register reg, const Immediate& imm);
   void cmpl(Register reg0, Register reg1);
   void cmpl(Register reg, const Address& address);
@@ skipping 198 matching lines @@
 }
 
 
 inline void Assembler::EmitOperandSizeOverride() {
   EmitUint8(0x66);
 }
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_IA32_H_