MIPS: Fix trampoline emission after switch table generation

src/mips64/assembler-mips64.cc

 // 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 841 matching lines @@
     Label l = *L;
     PrintF("unbound label");
     while (l.is_linked()) {
       PrintF("@ %d ", l.pos());
       Instr instr = instr_at(l.pos());
       if ((instr & ~kImm16Mask) == 0) {
         PrintF("value\n");
       } else {
         PrintF("%d\n", instr);
       }
-      next(&l, internal_reference_positions_.find(l.pos()) !=
-                   internal_reference_positions_.end());
+      next(&l, is_internal_reference(&l));
     }
   } else {
     PrintF("label in inconsistent state (pos = %d)\n", L->pos_);
   }
 }
 
 
 void Assembler::bind_to(Label* L, int pos) {
   DCHECK(0 <= pos && pos <= pc_offset());  // Must have valid binding position.
   int trampoline_pos = kInvalidSlotPos;
   bool is_internal = false;
   if (L->is_linked() && !trampoline_emitted_) {
     unbound_labels_count_--;
-    next_buffer_check_ += kTrampolineSlotsSize;
+    if (!is_internal_reference(L)) {
+      next_buffer_check_ += kTrampolineSlotsSize;
+    }
   }
 
   while (L->is_linked()) {
     int fixup_pos = L->pos();
     int dist = pos - fixup_pos;
-    is_internal = internal_reference_positions_.find(fixup_pos) !=
-                  internal_reference_positions_.end();
+    is_internal = is_internal_reference(L);
     next(L, is_internal);  // Call next before overwriting link with target at
                            // fixup_pos.
     Instr instr = instr_at(fixup_pos);
     if (is_internal) {
       target_at_put(fixup_pos, pos, is_internal);
     } else {
       if (IsBranch(instr)) {
         int branch_offset = BranchOffset(instr);
         if (dist > branch_offset) {
           if (trampoline_pos == kInvalidSlotPos) {
             trampoline_pos = get_trampoline_entry(fixup_pos);
             CHECK(trampoline_pos != kInvalidSlotPos);
           }
           CHECK((trampoline_pos - fixup_pos) <= branch_offset);
           target_at_put(fixup_pos, trampoline_pos, false);
           fixup_pos = trampoline_pos;
-          dist = pos - fixup_pos;
         }
         target_at_put(fixup_pos, pos, false);
       } else {
         DCHECK(IsJ(instr) || IsJal(instr) || IsLui(instr) ||
                IsEmittedConstant(instr));
         target_at_put(fixup_pos, pos, false);
       }
     }
   }
   L->bind_to(pos);
@@ skipping 2593 matching lines @@
 
   if (icache_flush_mode != SKIP_ICACHE_FLUSH) {
     Assembler::FlushICache(isolate, pc, 4 * Assembler::kInstrSize);
   }
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64