Subzero: Use "auto" per (unwritten) auto coding style.

src/IceTargetLoweringX8632.cpp

 //===- subzero/src/IceTargetLoweringX8632.cpp - x86-32 lowering -----------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 657 matching lines @@
   // t:ecx = pop
   // bundle_lock
   // and t, ~31
   // jmp *t
   // bundle_unlock
   // FakeUse <original_ret_operand>
   Variable *T_ecx = makeReg(IceType_i32, Traits::RegisterSet::Reg_ecx);
   _pop(T_ecx);
   lowerIndirectJump(T_ecx);
   if (RI->getSrcSize()) {
-    Variable *RetValue = llvm::cast<Variable>(RI->getSrc(0));
+    auto *RetValue = llvm::cast<Variable>(RI->getSrc(0));
     Context.insert(InstFakeUse::create(Func, RetValue));
   }
   RI->setDeleted();
 }
 
 void TargetX8632::emitJumpTable(const Cfg *Func,
                                 const InstJumpTable *JumpTable) const {
   if (!BuildDefs::dump())
     return;
   Ostream &Str = Ctx->getStrEmit();
@@ skipping 101 matching lines @@
 
     RandomNumberGenerator RNG(Ctx->getFlags().getRandomSeed(),
                               RPE_PooledConstantReordering, K);
     RandomShuffle(Pool.begin(), Pool.end(),
                   [&RNG](uint64_t N) { return (uint32_t)RNG.next(N); });
   }
 
   for (Constant *C : Pool) {
     if (!C->getShouldBePooled())
       continue;
-    typename T::IceType *Const = llvm::cast<typename T::IceType>(C);
+    auto *Const = llvm::cast<typename T::IceType>(C);
     typename T::IceType::PrimType Value = Const->getValue();
     // Use memcpy() to copy bits from Value into RawValue in a way that avoids
     // breaking strict-aliasing rules.
     typename T::PrimitiveIntType RawValue;
     memcpy(&RawValue, &Value, sizeof(Value));
     char buf[30];
     int CharsPrinted =
         snprintf(buf, llvm::array_lengthof(buf), T::PrintfString, RawValue);
     assert(CharsPrinted >= 0 &&
            (size_t)CharsPrinted < llvm::array_lengthof(buf));
@@ skipping 185 matching lines @@
 // case the high-level table has extra entries.
 #define X(tag, sizeLog2, align, elts, elty, str)                               \
   static_assert(_table1_##tag == _table2_##tag,                                \
                 "Inconsistency between ICETYPEX8632_TABLE and ICETYPE_TABLE");
 ICETYPE_TABLE
 #undef X
 } // end of namespace dummy3
 } // end of anonymous namespace
 
 } // end of namespace Ice