[clang] [llvm] [BPF] rename 'arena' to 'address_space' (PR #85161)

[via cfe-commits]

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@@ -517,13 +517,13 @@ bool BPFCheckAndAdjustIR::insertASpaceCasts(Module &M) {
     Changed |= !CastsCache.empty();
   }
   // Merge all globals within same address space into single
-  // .arena.<addr space no> section
+  // .address_space.<addr space no> section
   for (GlobalVariable &G : M.globals()) {
     if (G.getAddressSpace() == 0 || G.hasSection())
       continue;
     SmallString<16> SecName;
     raw_svector_ostream OS(SecName);
-    OS << ".arena." << G.getAddressSpace();
+    OS << ".address_space." << G.getAddressSpace();
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4ast wrote:

since instruction is called "addr_space" let's name the section name the same ".addr_space." ?
and __BPF_FEATURE_ADDR_SPACE_CAST too ?

https://github.com/llvm/llvm-project/pull/85161