[llvm] [SCCP] Remove masking operations (PR #142736)

[Nikita Popov via llvm-commits]

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@@ -157,6 +162,15 @@ static bool refineInstruction(SCCPSolver &Solver,
                           GEPNoWrapFlags::noUnsignedWrap());
       Changed = true;
     }
+  } else if (match(&Inst, m_And(m_Value(X), m_LowBitMask(RHSC)))) {
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nikic wrote:

Could try generalizing this away from LowBitMask in a followup. For CVP this reduces compile-time, but for IPSCCP it shouldn't matter.

https://github.com/llvm/llvm-project/pull/142736