[llvm] [VPlan] Assert unsupported interleaved access features early in the recipe constructor. nfc (PR #146669)

[Mel Chen via llvm-commits]

https://github.com/Mel-Chen created https://github.com/llvm/llvm-project/pull/146669

None

>From 6de82302a90a3c6103728019351f946204d406d6 Mon Sep 17 00:00:00 2001
From: Mel Chen <mel.chen at sifive.com>
Date: Wed, 2 Jul 2025 03:30:04 -0700
Subject: [PATCH] NFC, assert assert unsupported case earlier

---
 llvm/lib/Transforms/Vectorize/VPlan.h          | 3 +++
 llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp | 4 ----
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/llvm/lib/Transforms/Vectorize/VPlan.h b/llvm/lib/Transforms/Vectorize/VPlan.h
index d460573f5bec6..c5b214b355545 100644
--- a/llvm/lib/Transforms/Vectorize/VPlan.h
+++ b/llvm/lib/Transforms/Vectorize/VPlan.h
@@ -2346,6 +2346,9 @@ class VPInterleaveRecipe : public VPRecipeBase {
                      DL),
 
         IG(IG), NeedsMaskForGaps(NeedsMaskForGaps) {
+    // TODO: extend the masked interleaved-group support to reversed access.
+    assert((!Mask || !IG->isReverse()) &&
+           "Reversed masked interleave-group not supported.");
     for (unsigned i = 0; i < IG->getFactor(); ++i)
       if (Instruction *I = IG->getMember(i)) {
         if (I->getType()->isVoidTy())
diff --git a/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp b/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
index 24f2d6a83c5e4..4f8caf604e78a 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
@@ -3418,11 +3418,7 @@ void VPInterleaveRecipe::execute(VPTransformState &State) {
   unsigned InterleaveFactor = Group->getFactor();
   auto *VecTy = VectorType::get(ScalarTy, State.VF * InterleaveFactor);
 
-  // TODO: extend the masked interleaved-group support to reversed access.
   VPValue *BlockInMask = getMask();
-  assert((!BlockInMask || !Group->isReverse()) &&
-         "Reversed masked interleave-group not supported.");
-
   VPValue *Addr = getAddr();
   Value *ResAddr = State.get(Addr, VPLane(0));
   if (auto *I = dyn_cast<Instruction>(ResAddr))