MIPS: Align emitting a trampoline pool to instruction size boundaries.

src/mips64/assembler-mips64-inl.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 427 matching lines @@
     ClearCompactBranchState();
   }
   *reinterpret_cast<Instr*>(pc_) = x;
   pc_ += kInstrSize;
   if (is_compact_branch == CompactBranchType::COMPACT_BRANCH) {
     EmittedCompactBranchInstruction();
   }
   CheckTrampolinePoolQuick();
 }
 
+template <>
+inline void Assembler::EmitHelper(uint8_t x);
 
 template <typename T>
 void Assembler::EmitHelper(T x) {
   *reinterpret_cast<T*>(pc_) = x;
   pc_ += sizeof(x);
   CheckTrampolinePoolQuick();
 }
 
+template <>
+void Assembler::EmitHelper(uint8_t x) {
+  *reinterpret_cast<uint8_t*>(pc_) = x;
+  pc_ += sizeof(x);
+  if (reinterpret_cast<intptr_t>(pc_) % kInstrSize == 0) {
+    CheckTrampolinePoolQuick();
+  }
+}
 
 void Assembler::emit(Instr x, CompactBranchType is_compact_branch) {
   if (!is_buffer_growth_blocked()) {
     CheckBuffer();
   }
   EmitHelper(x, is_compact_branch);
 }
 
 
 void Assembler::emit(uint64_t data) {
   CheckForEmitInForbiddenSlot();
   EmitHelper(data);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MIPS_ASSEMBLER_MIPS_INL_H_