R600/SI - Add new CI arithmetic instructions.

Does not yet include larger part required
to match v_mad_i64_i32 / v_mad_u64_u32.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202077 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/R600/AMDGPUISelLowering.cpp

@@ -45,6 +45,8 @@ static bool allocateStack(unsigned ValNo, MVT ValVT, MVT LocVT,
 AMDGPUTargetLowering::AMDGPUTargetLowering(TargetMachine &TM) :
   TargetLowering(TM, new TargetLoweringObjectFileELF()) {
 
+  Subtarget = &TM.getSubtarget<AMDGPUSubtarget>();
+
   // Initialize target lowering borrowed from AMDIL
   InitAMDILLowering();