R600: Add a CONST_ADDRESS node to model constant buf read

Patch by: Vincent Lejeune

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173221 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/R600/AMDGPUISelLowering.cpp b/lib/Target/R600/AMDGPUISelLowering.cpp
index 473dac4..309bcf5 100644
--- a/lib/Target/R600/AMDGPUISelLowering.cpp
+++ b/lib/Target/R600/AMDGPUISelLowering.cpp
@@ -413,5 +413,6 @@
   NODE_NAME_CASE(INTERP)
   NODE_NAME_CASE(INTERP_P0)
   NODE_NAME_CASE(EXPORT)
+  NODE_NAME_CASE(CONST_ADDRESS)
   }
 }