[llvm] [GlobalISel] Add KnownBits support for G_INSERT_SUBVECTOR (PR #215048)

[David Green via llvm-commits]

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@@ -1081,6 +1125,7 @@ void GISelValueTracking::computeKnownBitsImpl(Register R, KnownBits &Known,
     computeKnownBitsImpl(SrcReg, Known, DemandedSrcElts, Depth + 1);
     break;
   }
+
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davemgreen wrote:

Can you undo any formatting not related to the patch.

https://github.com/llvm/llvm-project/pull/215048