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

src/mips/macro-assembler-mips.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/mips/assembler-mips.h"
@@ skipping 1760 matching lines @@
 template <typename Func>
 void MacroAssembler::GenerateSwitchTable(Register index, size_t case_count,
                                          Func GetLabelFunction) {
   if (kArchVariant >= kMips32r6) {
     BlockTrampolinePoolFor(case_count + 5);
     addiupc(at, 5);
     lsa(at, at, index, kPointerSizeLog2);
     lw(at, MemOperand(at));
   } else {
     Label here;
-    BlockTrampolinePoolFor(case_count + 6);
+    BlockTrampolinePoolFor(case_count + 10);
+    push(ra);
     bal(&here);
     sll(at, index, kPointerSizeLog2);  // Branch delay slot.
     bind(&here);
     addu(at, at, ra);
-    lw(at, MemOperand(at, 4 * v8::internal::Assembler::kInstrSize));
+    pop(ra);
+    lw(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_