[llvm] [LV][EVL] Support call instruction with EVL-vectorization (PR #110412)

[via llvm-commits]

================
@@ -993,24 +993,39 @@ void VPWidenIntrinsicRecipe::execute(VPTransformState &State) {
     Args.push_back(Arg);
   }
 
-  // Use vector version of the intrinsic.
-  Module *M = State.Builder.GetInsertBlock()->getModule();
-  Function *VectorF =
-      Intrinsic::getOrInsertDeclaration(M, VectorIntrinsicID, TysForDecl);
-  assert(VectorF && "Can't retrieve vector intrinsic.");
-
-  auto *CI = cast_or_null<CallInst>(getUnderlyingValue());
-  SmallVector<OperandBundleDef, 1> OpBundles;
-  if (CI)
-    CI->getOperandBundlesAsDefs(OpBundles);
+  if (VPIntrinsic::isVPIntrinsic(VectorIntrinsicID)) {
+    // Use vector version of the vector predicate Intrinsic
+    IRBuilderBase &BuilderIR = State.Builder;
+    VectorBuilder VBuilder(BuilderIR);
+    Value *Mask = BuilderIR.CreateVectorSplat(State.VF, BuilderIR.getTrue());
+    VBuilder.setMask(Mask).setEVL(Args.back());
+    // Remove the EVL from Args
+    Args.pop_back();
+    Value *VPInst = VBuilder.createSimpleIntrinsic(
+        VectorIntrinsicID, TysForDecl[0], Args, "vp.call");
+    if (!VPInst->getType()->isVoidTy())
+      State.set(this, VPInst);
+    State.addMetadata(VPInst,
+                      dyn_cast_or_null<Instruction>(getUnderlyingValue()));
+  } else {
----------------
LiqinWeng wrote:

pls see：https://github.com/llvm/llvm-project/pull/108351/files

https://github.com/llvm/llvm-project/pull/110412