[llvm] [AMDGPU] Extend zero initialization of return values for TFE (PR #85759)

[David Stuttard via llvm-commits]

================
@@ -119,6 +119,7 @@ class MTBUF_Real <MTBUF_Pseudo ps, string real_name = ps.Mnemonic> :
 
   let isPseudo = 0;
   let isCodeGenOnly = 0;
+  let hasPostISelHook = 1;
----------------
dstutt wrote:

I missed this one - it shouldn't be there. I'll remove it.

https://github.com/llvm/llvm-project/pull/85759