Add address space argument to isLegalAddressingMode

This is important because of different addressing modes
depending on the address space for GPU targets.

This only adds the argument, and does not update
any of the uses to provide the correct address space.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238723 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/R600/SIISelLowering.cpp

@@ -263,7 +263,7 @@ bool SITargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &,
 // SMRD instructions have an 8-bit, dword offset.
 //
 bool SITargetLowering::isLegalAddressingMode(const AddrMode &AM,
-                                             Type *Ty) const {
+                                             Type *Ty, unsigned AS) const {
   // No global is ever allowed as a base.
   if (AM.BaseGV)
     return false;