[lld] [lld] Merge GOT entries for symbols that have been ICFed (PR #131630)

[Jessica Clarke via llvm-commits]

================
@@ -138,6 +137,14 @@ class GotSection final : public SyntheticSection {
     bool isSymbolFunc;
   };
   SmallVector<AuthEntryInfo, 0> authEntries;
+
+  // Map of GOT entries keyed by section, offset, and type. The purpose is to
----------------
jrtc27 wrote:

How do you propose targets override this to require additional properties be the same? For CHERI targets (currently downstream, but eventually to be upstreamed) we would also need to ensure the symbol size was the same, since that determines the bounds for the GOT entry.

https://github.com/llvm/llvm-project/pull/131630