[llvm] [SDAG] Simplifies `SDNodeFlags` with bitwise logic (PR #114061)

[Craig Topper via llvm-commits]

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@@ -1006,6 +1016,7 @@ END_TWO_BYTE_PACK()
 
   SDNodeFlags getFlags() const { return Flags; }
   void setFlags(SDNodeFlags NewFlags) { Flags = NewFlags; }
+  void clearFlags(unsigned Mask) { Flags &= ~Mask; }
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topperc wrote:

I'm ok with `dropFlags`

https://github.com/llvm/llvm-project/pull/114061