Merging r243661:

------------------------------------------------------------------------
r243661 | Matthew.Arsenault | 2015-07-30 13:03:11 -0400 (Thu, 30 Jul 2015) | 6 lines

AMDGPU: Set SubRegIndex size and offset

I'm not sure what reasons the comment here could have
had for not setting these. Without these set, there is
an assertion hit during DWARF emission.

------------------------------------------------------------------------

git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_37@253230 91177308-0d34-0410-b5e6-96231b3b80d8

Author: tstellarAMD

lib/Target/AMDGPU/AMDGPURegisterInfo.td

@@ -14,8 +14,7 @@
 let Namespace = "AMDGPU" in {
 
 foreach Index = 0-15 in {
-  // Indices are used in a variety of ways here, so don't set a size/offset.
-  def sub#Index : SubRegIndex<-1, -1>;
+  def sub#Index : SubRegIndex<32, !shl(Index, 5)>;
 }
 
 def INDIRECT_BASE_ADDR : Register <"INDIRECT_BASE_ADDR">;