[clang] [lld] [llvm] [mlir] [IR] Introduce `T<address space>` to `DataLayout` to represent flat address space if a target supports it (PR #108786)

[Shilei Tian via cfe-commits]

================
@@ -579,7 +579,7 @@ static StringRef computeDataLayout(const Triple &TT) {
          "-p7:160:256:256:32-p8:128:128-p9:192:256:256:32-i64:64-v16:16-v24:32-"
          "v32:32-v48:64-v96:"
          "128-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64-S32-A5-"
-         "G1-ni:7:8:9";
+         "G1-ni:7:8:9-T0";
----------------
shiltian wrote:

Does r600 have flat address space?

https://github.com/llvm/llvm-project/pull/108786