Add fabs(<4 x float>) to the integrated ARM assembler.

src/IceTargetLoweringARM32.cpp

 //===- subzero/src/IceTargetLoweringARM32.cpp - ARM32 lowering ------------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 4926 matching lines @@
       Variable *T = makeReg(IceType_i32);
       _rbit(T, ValLoR);
       ValLoR = T;
     }
     lowerCLZ(Dest, ValLoR, ValHiR);
     return;
   }
   case Intrinsics::Fabs: {
     Type DestTy = Dest->getType();
     Variable *T = makeReg(DestTy);
-    if (isVectorType(DestTy)) {
-      UnimplementedLoweringError(this, Instr);
-      return;
-    }
     _vabs(T, legalizeToReg(Instr->getArg(0)));
     _mov(Dest, T);
     return;
   }
   case Intrinsics::Longjmp: {
     llvm::report_fatal_error("longjmp should have been prelowered.");
   }
   case Intrinsics::Memcpy: {
     llvm::report_fatal_error("memcpy should have been prelowered.");
   }
@@ skipping 1817 matching lines @@
   Str << ".eabi_attribute 14, 3   @ Tag_ABI_PCS_R9_use: Not used\n";
 }
 
 llvm::SmallBitVector TargetARM32::TypeToRegisterSet[RegARM32::RCARM32_NUM];
 llvm::SmallBitVector
     TargetARM32::TypeToRegisterSetUnfiltered[RegARM32::RCARM32_NUM];
 llvm::SmallBitVector TargetARM32::RegisterAliases[RegARM32::Reg_NUM];
 
 } // end of namespace ARM32
 } // end of namespace Ice