PPC: Fix trampoline pool blocking.

src/ppc/assembler-ppc.h

 // 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 1292 matching lines @@
     return constant_pool_builder_.AddEntry(pc_offset(), value);
   }
 
   // Block the emission of the trampoline pool before pc_offset.
   void BlockTrampolinePoolBefore(int pc_offset) {
     if (no_trampoline_pool_before_ < pc_offset)
       no_trampoline_pool_before_ = pc_offset;
   }
 
   void StartBlockTrampolinePool() { trampoline_pool_blocked_nesting_++; }
-  void EndBlockTrampolinePool() { trampoline_pool_blocked_nesting_--; }
+  void EndBlockTrampolinePool() {
+    int count = --trampoline_pool_blocked_nesting_;
+    if (count == 0) CheckTrampolinePoolQuick();
+  }
   bool is_trampoline_pool_blocked() const {
     return trampoline_pool_blocked_nesting_ > 0;
   }
 
   void StartBlockConstantPoolEntrySharing() {
     constant_pool_entry_sharing_blocked_nesting_++;
   }
   void EndBlockConstantPoolEntrySharing() {
     constant_pool_entry_sharing_blocked_nesting_--;
   }
@@ skipping 124 matching lines @@
 
 
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) { assembler->CheckBuffer(); }
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PPC_ASSEMBLER_PPC_H_