[turbofan] Re-enables the jump table emission in the mips instruction selector.

src/mips64/macro-assembler-mips64.h

 // 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.
 
 #ifndef V8_MIPS_MACRO_ASSEMBLER_MIPS_H_
 #define V8_MIPS_MACRO_ASSEMBLER_MIPS_H_
 
 #include "src/assembler.h"
 #include "src/globals.h"
 #include "src/mips64/assembler-mips64.h"
@@ skipping 1923 matching lines @@
     BlockTrampolinePoolFor(static_cast<int>(case_count) * 2 + 6);
     // Opposite of Align(8) as we have odd number of instructions in this case.
     if ((pc_offset() & 7) == 0) {
       nop();
     }
     addiupc(at, 5);
     dlsa(at, at, index, kPointerSizeLog2);
     ld(at, MemOperand(at));
   } else {
     Label here;
-    BlockTrampolinePoolFor(static_cast<int>(case_count) * 2 + 7);
+    BlockTrampolinePoolFor(static_cast<int>(case_count) * 2 + 11);
     Align(8);
+    push(ra);
     bal(&here);
     dsll(at, index, kPointerSizeLog2);  // Branch delay slot.
     bind(&here);
     daddu(at, at, ra);
-    ld(at, MemOperand(at, 4 * v8::internal::Assembler::kInstrSize));
+    pop(ra);
+    ld(at, MemOperand(at, 6 * v8::internal::Assembler::kInstrSize));
   }
   jr(at);
   nop();  // Branch delay slot nop.
   for (size_t index = 0; index < case_count; ++index) {
     dd(GetLabelFunction(index));
   }
 }
 
 #ifdef GENERATED_CODE_COVERAGE
 #define CODE_COVERAGE_STRINGIFY(x) #x
 #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x)
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MIPS_MACRO_ASSEMBLER_MIPS_H_