[llvm] [LV] Consider interleaving when -enable-wide-lane-mask=true (PR #163387)

[David Sherwood via llvm-commits]

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@@ -249,6 +249,10 @@ static cl::opt<TailFoldingStyle> ForceTailFoldingStyle(
                    "Use predicated EVL instructions for tail folding. If EVL "
                    "is unsupported, fallback to data-without-lane-mask.")));
 
+cl::opt<bool> llvm::EnableWideActiveLaneMask(
+    "enable-wide-lane-mask", cl::init(false), cl::Hidden,
+    cl::desc("Enable use of wide get active lane mask instructions"));
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david-arm wrote:

nit: Perhaps just say 'Enable use of wide lane masks when used for control flow in tail-folded loops'?

https://github.com/llvm/llvm-project/pull/163387