[llvm] [BOLT] Add support for safe-icf (PR #116275)

[Amir Ayupov via llvm-commits]

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@@ -52,7 +52,11 @@ class IdenticalCodeFolding : public BinaryFunctionPass {
     return VtableBitVector.test(Address / 8);
   }
   /// Initialize bit vector of memory addresses of vtables.
-  void initVtable() { VtableBitVector.resize((((uint64_t)1) << 32) / 8); }
+  void initVtable() {
+    constexpr uint64_t PotentialRelocationAddressRange =
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aaupov wrote:

A word why 4GB is sufficient?

https://github.com/llvm/llvm-project/pull/116275