[SubZero] Implement lowerSwitch for MIPS

src/IceTargetLoweringMIPS32.h

 //===- subzero/src/IceTargetLoweringMIPS32.h - MIPS32 lowering ---*- C++-*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 160 matching lines @@
            Operand *Src1, CondMIPS32::Cond Condition) {
     Context.insert<InstMIPS32Br>(TargetTrue, TargetFalse, Src0, Src1,
                                  Condition);
   }
 
   void _br(CfgNode *TargetTrue, CfgNode *TargetFalse, Operand *Src0,
            CondMIPS32::Cond Condition) {
     Context.insert<InstMIPS32Br>(TargetTrue, TargetFalse, Src0, Condition);
   }
 
+  void _br(CfgNode *TargetTrue, CfgNode *TargetFalse, Operand *Src0,
+           Operand *Src1, const InstMIPS32Label *Label,
+           CondMIPS32::Cond Condition) {
+    Context.insert<InstMIPS32Br>(TargetTrue, TargetFalse, Src0, Src1, Label,
+                                 Condition);
+  }
+
   void _ret(Variable *RA, Variable *Src0 = nullptr) {
     Context.insert<InstMIPS32Ret>(RA, Src0);
   }
 
   void _add_d(Variable *Dest, Variable *Src0, Variable *Src1) {
     Context.insert<InstMIPS32Add_d>(Dest, Src0, Src1);
   }
 
   void _add_s(Variable *Dest, Variable *Src0, Variable *Src1) {
     Context.insert<InstMIPS32Add_s>(Dest, Src0, Src1);
@@ skipping 529 matching lines @@
   explicit TargetHeaderMIPS32(GlobalContext *Ctx);
 
 private:
   ~TargetHeaderMIPS32() = default;
 };
 
 } // end of namespace MIPS32
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETARGETLOWERINGMIPS32_H