[AMDGPU] Temporarily change constant address space from 4 to 2

Our final address space mapping is to let constant address space to be 4 to match nvptx.
However for now we will make it 2 to avoid unnecessary work in FE/BE/devlib
about intrinsics returning constant pointers.

Differential Revision: https://reviews.llvm.org/D31770

llvm-svn: 299690

1 files changed, 1 insertions, 3 deletions

diff --git a/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp b/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
index 6b9a81976c6..12778044bc9 100644
--- a/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
@@ -772,13 +772,11 @@ AMDGPUAS getAMDGPUAS(Triple T) {
   AMDGPUAS AS;
   if (Env == "amdgiz" || Env == "amdgizcl") {
     AS.FLAT_ADDRESS     = 0;
-    AS.CONSTANT_ADDRESS = 4;
     AS.PRIVATE_ADDRESS  = 5;
-    AS.REGION_ADDRESS   = 2;
+    AS.REGION_ADDRESS   = 4;
   }
   else {
     AS.FLAT_ADDRESS     = 4;
-    AS.CONSTANT_ADDRESS = 2;
     AS.PRIVATE_ADDRESS  = 0;
     AS.REGION_ADDRESS   = 5;
    }