[llvm] [LV, VP]VP intrinsics support for the Loop Vectorizer + adding new tail-folding mode using EVL. (PR #76172)

[Alexey Bataev via llvm-commits]

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@@ -247,10 +248,12 @@ static cl::opt<TailFoldingStyle> ForceTailFoldingStyle(
         clEnumValN(TailFoldingStyle::DataAndControlFlow, "data-and-control",
                    "Create lane mask using active.lane.mask intrinsic, and use "
                    "it for both data and control flow"),
-        clEnumValN(
-            TailFoldingStyle::DataAndControlFlowWithoutRuntimeCheck,
-            "data-and-control-without-rt-check",
-            "Similar to data-and-control, but remove the runtime check")));
+        clEnumValN(TailFoldingStyle::DataAndControlFlowWithoutRuntimeCheck,
+                   "data-and-control-without-rt-check",
+                   "Similar to data-and-control, but remove the runtime check"),
+        clEnumValN(TailFoldingStyle::DataWithEVL, "data-with-evl",
+                   "Use predicated EVL instructions for tail folding if the "
+                   "target supports vector length predication")));
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alexey-bataev wrote:

Removed

https://github.com/llvm/llvm-project/pull/76172