Revert^2 "Compiler changes for bitstring based type checks."

Add extra output for debugging failures and re-enable
the bitstring type checks.

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing --jit
Test: testrunner.py --host -t 670-bitstring-type-check
Test: Pixel 2 XL boots.
Test: testrunner.py --target --optimizing --jit
Test: testrunner.py --target -t 670-bitstring-type-check
Bug: 64692057
Bug: 26687569

This reverts commit bff7a52e2c6c9e988c3ed1f12a2da0fa5fd37cfb.

Change-Id: I090e241983f3ac6ed8394d842e17716087d169ac
diff --git a/compiler/optimizing/code_generator_mips64.h b/compiler/optimizing/code_generator_mips64.h
index 74c947e..6e69e46 100644
--- a/compiler/optimizing/code_generator_mips64.h
+++ b/compiler/optimizing/code_generator_mips64.h
@@ -233,6 +233,7 @@
 
  private:
   void GenerateClassInitializationCheck(SlowPathCodeMIPS64* slow_path, GpuRegister class_reg);
+  void GenerateBitstringTypeCheckCompare(HTypeCheckInstruction* check, GpuRegister temp);
   void GenerateSuspendCheck(HSuspendCheck* check, HBasicBlock* successor);
   void HandleBinaryOp(HBinaryOperation* operation);
   void HandleCondition(HCondition* instruction);