[SubZero] Vector types support for MIPS

src/IceTargetLoweringMIPS32.h

Index: src/IceTargetLoweringMIPS32.h
diff --git a/src/IceTargetLoweringMIPS32.h b/src/IceTargetLoweringMIPS32.h
index 7e87f0435ad41c4d8498f117e02b210005419155..d941deba90c4cc898b91ee02601b43434ca5fc99 100644
--- a/src/IceTargetLoweringMIPS32.h
+++ b/src/IceTargetLoweringMIPS32.h
@@ -111,6 +111,10 @@ public:
     return Ty == IceType_i64;
   }
 
+  bool shouldSplitToVariableVecOn32(Type Ty) const override {
+    return isVectorType(Ty);
+  }
+
   // TODO(ascull): what is the best size of MIPS?
   SizeT getMinJumpTableSize() const override { return 3; }
   void emitJumpTable(const Cfg *Func,
@@ -609,9 +613,11 @@ public:
   void split64(Variable *Var);
   Operand *loOperand(Operand *Operand);
   Operand *hiOperand(Operand *Operand);
+  Operand *getOperandAtIndex(Operand *Operand, Type BaseType, uint32_t Index);
 
-  void finishArgumentLowering(Variable *Arg, Variable *FramePtr,
-                              size_t BasicFrameOffset, size_t *InArgsSizeBytes);
+  void finishArgumentLowering(Variable *Arg, bool PartialOnStack,
+                              Variable *FramePtr, size_t BasicFrameOffset,
+                              size_t *InArgsSizeBytes);
 
   Operand *legalizeUndef(Operand *From, RegNumT RegNum = RegNumT());
 
@@ -630,6 +636,7 @@ public:
     /// appropriate register number. Note that, when Ty == IceType_i64, Reg will
     /// be an I64 register pair.
     bool argInReg(Type Ty, uint32_t ArgNo, RegNumT *Reg);
+    void discardReg(RegNumT Reg) { GPRegsUsed |= RegisterAliases[Reg]; }
 
   private:
     // argInGPR is used to find if any GPR register is available for argument of