[llvm] [Analysis][ValueTracking] Unify most of the tracking between AssumptionCache and DomConditionCache (PR #83161)

[via llvm-commits]

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@@ -813,6 +813,8 @@ void llvm::computeKnownBitsFromContext(const Value *V, KnownBits &Known,
     if (!isValidAssumeForContext(I, Q.CxtI, Q.DT))
       continue;
 
+    // Change to `computeKnownBitsFromCond` if we start supporting assume of
+    // logic op in ConditionCacheUtil.
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goldsteinn wrote:

Something like `assume(a || b)` can exist.

I'm happy to drop supporting it in this patch, but would prefer to keep comments indicating the steps necessary should we change out mind.

that okay?

https://github.com/llvm/llvm-project/pull/83161