[llvm] [InstCombine] Move foldLogOpOfMaskedICmps to make it possible to handle trunc to i1. (PR #122179)

[via llvm-commits]

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@@ -3510,6 +3524,12 @@ Value *InstCombinerImpl::foldBooleanAndOr(Value *LHS, Value *RHS,
       if (Value *Res = foldAndOrOfICmps(LHSCmp, RHSCmp, I, IsAnd, IsLogical))
         return Res;
 
+  /// Try to fold (icmp(A & B) ==/!= C) &/| (icmp(A & D) ==/!= E)
+  /// into a single (icmp(A & X) ==/!= Y).
+  if (Value *V = foldLogOpOfMaskedICmps(LHS, RHS, IsAnd, IsLogical, Builder,
+                                        SQ.getWithInstruction(&I)))
+    return V;
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goldsteinn wrote:

Maybe keep the original place of the call in this commit so this change can be NFC. Would simplify review.

https://github.com/llvm/llvm-project/pull/122179