[llvm] [ValueTracking] Add support for non-splat vecs in cmpExcludesZero (PR #68331)

[via llvm-commits]

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@@ -558,7 +558,7 @@ bool llvm::isValidAssumeForContext(const Instruction *Inv,
 // example Pred=EQ, RHS=isKnownNonZero. cmpExcludesZero is called in loops
 // so the extra compile time may not be worth it, but possibly a second API
 // should be created for use outside of loops.
-static bool cmpExcludesZero(CmpInst::Predicate Pred, const Value *RHS) {
+static bool cmpExcludesZero(CmpInst::Predicate Pred, Value *RHS) {
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goldsteinn wrote:

Added back (it was for matching `m_ImmConstant()`)

https://github.com/llvm/llvm-project/pull/68331