[llvm] [LVI] Add trunc to i1 handling. (PR #124480)

[Andreas Jonson via llvm-commits]

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@@ -1283,6 +1285,20 @@ std::optional<ValueLatticeElement> LazyValueInfoImpl::getValueFromICmpCondition(
   return ValueLatticeElement::getOverdefined();
 }
 
+std::optional<ValueLatticeElement>
+LazyValueInfoImpl::getValueFromTrunc(Value *Val, TruncInst *Trunc,
+                                     bool IsTrueDest) {
+  assert(Trunc->getType()->isIntegerTy(1));
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andjo403 wrote:

assert fixed and test added see `and_elide_trunc_cond_vec`

https://github.com/llvm/llvm-project/pull/124480