[llvm] [VPlan] Explicitly replicate VPInstructions by VF. (PR #155102)

[via llvm-commits]

================
@@ -1154,24 +1144,13 @@ void VPInstruction::execute(VPTransformState &State) {
          "Set flags not supported for the provided opcode");
   if (hasFastMathFlags())
     State.Builder.setFastMathFlags(getFastMathFlags());
-  bool GeneratesPerFirstLaneOnly = canGenerateScalarForFirstLane() &&
-                                   (vputils::onlyFirstLaneUsed(this) ||
-                                    isVectorToScalar() || isSingleScalar());
-  bool GeneratesPerAllLanes = doesGeneratePerAllLanes();
-  if (GeneratesPerAllLanes) {
-    for (unsigned Lane = 0, NumLanes = State.VF.getFixedValue();
-         Lane != NumLanes; ++Lane) {
-      Value *GeneratedValue = generatePerLane(State, VPLane(Lane));
-      assert(GeneratedValue && "generatePerLane must produce a value");
-      State.set(this, GeneratedValue, VPLane(Lane));
-    }
-    return;
-  }
----------------
ayalz wrote:

This is dropped due to earlier replication of VPInstructions by VF.

https://github.com/llvm/llvm-project/pull/155102