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

[Maksim Panchenko via llvm-commits]

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@@ -1945,6 +1959,29 @@ static void printDebugInfo(raw_ostream &OS, const MCInst &Instruction,
     OS << " discriminator:" << Row.Discriminator;
 }
 
+/// Skip instructions that do not potentially manipulate or compare function
+/// addresses.
+static bool skipInstruction(const MCInst &Inst, const BinaryContext &BC) {
+  const bool IsX86 = BC.isX86();
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maksfb wrote:

What is the purpose of defining `IsX86` here?

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