Fix uses of art::HCompare::IsGtBias on MIPS32 and MIPS64.

Do not call this method on non floating-point HCompare
instructions.

Change-Id: I262ab23f48d32295641063f897dca02cb92eb2e2
diff --git a/compiler/optimizing/code_generator_mips.cc b/compiler/optimizing/code_generator_mips.cc
index ad3e988..c500ea4 100644
--- a/compiler/optimizing/code_generator_mips.cc
+++ b/compiler/optimizing/code_generator_mips.cc
@@ -2107,7 +2107,6 @@
   LocationSummary* locations = instruction->GetLocations();
   Register res = locations->Out().AsRegister<Register>();
   Primitive::Type in_type = instruction->InputAt(0)->GetType();
-  bool gt_bias = instruction->IsGtBias();
   bool isR6 = codegen_->GetInstructionSetFeatures().IsR6();
 
   //  0 if: left == right
@@ -2141,6 +2140,7 @@
     }
 
     case Primitive::kPrimFloat: {
+      bool gt_bias = instruction->IsGtBias();
       FRegister lhs = locations->InAt(0).AsFpuRegister<FRegister>();
       FRegister rhs = locations->InAt(1).AsFpuRegister<FRegister>();
       MipsLabel done;
@@ -2180,6 +2180,7 @@
       break;
     }
     case Primitive::kPrimDouble: {
+      bool gt_bias = instruction->IsGtBias();
       FRegister lhs = locations->InAt(0).AsFpuRegister<FRegister>();
       FRegister rhs = locations->InAt(1).AsFpuRegister<FRegister>();
       MipsLabel done;