[llvm] [DAG] Early exit for flags in canCreateUndefOrPoison [nfc] (PR #89834)

[Nikita Popov via llvm-commits]

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@@ -452,6 +452,13 @@ struct SDNodeFlags {
   bool hasNoFPExcept() const { return NoFPExcept; }
   bool hasUnpredictable() const { return Unpredictable; }
 
+  bool hasAny() const {
+    return NoUnsignedWrap || NoSignedWrap || Exact || Disjoint || NonNeg ||
+           NoNaNs || NoInfs || NoSignedZeros || AllowReciprocal ||
+           AllowContract || ApproximateFuncs || AllowReassociation ||
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nikic wrote:

Unpredictable is definitely not poison-generating.

NoFPExcept I'm not sure about, but I'd assume that one results in UB rather than poison.

https://github.com/llvm/llvm-project/pull/89834