[llvm] [InstCombine] Handle trunc i1 pattern in eq-of-parts fold (PR #112704)

[Yingwei Zheng via llvm-commits]

================
@@ -3538,6 +3546,9 @@ Value *InstCombinerImpl::foldBooleanAndOr(Value *LHS, Value *RHS,
       if (Value *Res = foldLogicOfFCmps(LHSCmp, RHSCmp, IsAnd, IsLogical))
         return Res;
 
+  if (Value *Res = foldEqOfParts(LHS, RHS, IsAnd))
----------------
dtcxzyw wrote:

Agree that we shouldn't maintain an ordering of folds. But it is ok to move folds between these early exit points.
Currently we place the fold after this early exit point, causing `trunc(lshr Y, Shift)` pattern on RHS of icmp cannot be captured by `matchIntPart`.


https://github.com/llvm/llvm-project/pull/112704