[lld] [lld][elf] add safe-thunks in ELF (PR #126695)

[via llvm-commits]

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@@ -102,6 +103,13 @@ class TargetInfo {
   virtual void applyJumpInstrMod(uint8_t *loc, JumpModType type,
                                  JumpModType val) const {}
 
+  // Initialize the body of the safe thunk in ICF for the target.
+  virtual void initICFSafeThunkBody(InputSection *thunk, Symbol *target) const {
+    llvm_unreachable("target does not support ICF safe thunks");
+  }
+  // Returns the size of the safe thunk in ICF for the target.
+  virtual uint32_t getICFSafeThunkSize() const { return 0; }
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alx32 wrote:

I think this one should also be llvm_unreachable

https://github.com/llvm/llvm-project/pull/126695