[SubZero] Implement lowerSwitch for MIPS

src/IceTargetLoweringMIPS32.h

Index: src/IceTargetLoweringMIPS32.h
diff --git a/src/IceTargetLoweringMIPS32.h b/src/IceTargetLoweringMIPS32.h
index 70fed4e8cbc11e74742b3ba7c14820f9d0615c3f..5d5a98ec9966cb315e4c7503c5e15d988ecbe08b 100644
--- a/src/IceTargetLoweringMIPS32.h
+++ b/src/IceTargetLoweringMIPS32.h
@@ -178,6 +178,13 @@ public:
     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);
   }