Subzero: Remove unneeded ScratchRegs.

src/IceTargetLoweringMIPS32.cpp

 //===- subzero/src/IceTargetLoweringMIPS32.cpp - MIPS32 lowering ----------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 54 matching lines @@
 TargetMIPS32::TargetMIPS32(Cfg *Func) : TargetLowering(Func) {}
 
 void TargetMIPS32::staticInit(GlobalContext *Ctx) {
   (void)Ctx;
   llvm::SmallBitVector IntegerRegisters(RegMIPS32::Reg_NUM);
   llvm::SmallBitVector I64PairRegisters(RegMIPS32::Reg_NUM);
   llvm::SmallBitVector Float32Registers(RegMIPS32::Reg_NUM);
   llvm::SmallBitVector Float64Registers(RegMIPS32::Reg_NUM);
   llvm::SmallBitVector VectorRegisters(RegMIPS32::Reg_NUM);
   llvm::SmallBitVector InvalidRegisters(RegMIPS32::Reg_NUM);
-  ScratchRegs.resize(RegMIPS32::Reg_NUM);
 #define X(val, encode, name, scratch, preserved, stackptr, frameptr, isInt,    \
           isI64Pair, isFP32, isFP64, isVec128, alias_init)                     \
   IntegerRegisters[RegMIPS32::val] = isInt;                                    \
   I64PairRegisters[RegMIPS32::val] = isI64Pair;                                \
   Float32Registers[RegMIPS32::val] = isFP32;                                   \
   Float64Registers[RegMIPS32::val] = isFP64;                                   \
   VectorRegisters[RegMIPS32::val] = isVec128;                                  \
   RegisterAliases[RegMIPS32::val].resize(RegMIPS32::Reg_NUM);                  \
   for (SizeT RegAlias : alias_init) {                                          \
     assert(!RegisterAliases[RegMIPS32::val][RegAlias] &&                       \
            "Duplicate alias for " #val);                                       \
     RegisterAliases[RegMIPS32::val].set(RegAlias);                             \
   }                                                                            \
   RegisterAliases[RegMIPS32::val].resize(RegMIPS32::Reg_NUM);                  \
-  assert(RegisterAliases[RegMIPS32::val][RegMIPS32::val]);                     \
-  ScratchRegs[RegMIPS32::val] = scratch;
+  assert(RegisterAliases[RegMIPS32::val][RegMIPS32::val]);
   REGMIPS32_TABLE;
 #undef X
   TypeToRegisterSet[IceType_void] = InvalidRegisters;
   TypeToRegisterSet[IceType_i1] = IntegerRegisters;
   TypeToRegisterSet[IceType_i8] = IntegerRegisters;
   TypeToRegisterSet[IceType_i16] = IntegerRegisters;
   TypeToRegisterSet[IceType_i32] = IntegerRegisters;
   TypeToRegisterSet[IceType_i64] = IntegerRegisters;
   TypeToRegisterSet[IceType_f32] = Float32Registers;
   TypeToRegisterSet[IceType_f64] = Float64Registers;
@@ skipping 1009 matching lines @@
   OstreamLocker L(Ctx);
   Ostream &Str = Ctx->getStrEmit();
   Str << "\t.set\t"
       << "nomicromips\n";
   Str << "\t.set\t"
       << "nomips16\n";
 }
 
 llvm::SmallBitVector TargetMIPS32::TypeToRegisterSet[IceType_NUM];
 llvm::SmallBitVector TargetMIPS32::RegisterAliases[RegMIPS32::Reg_NUM];
-llvm::SmallBitVector TargetMIPS32::ScratchRegs;
 
 } // end of namespace MIPS32
 } // end of namespace Ice