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

[Davide Italiano via llvm-commits]

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@@ -276,12 +276,24 @@ class BinaryContext {
   void deregisterSectionName(const BinarySection &Section);
 
 public:
+  enum class ICFLevel {
+    None,
+    Safe, // Safe ICF for all sections.
+    All,  // Aggressive ICF for code, but safe ICF for data, similar to MSVC's
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dcci wrote:

I guess "Aggressive" or "Unsafe" would be a better name, unless you took inspiration for this enum from somewhere else.

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