[llvm] [VPlan] Fix header phi VPInstruction verification. NFC (PR #151472)

[Luke Lau via llvm-commits]

https://github.com/lukel97 created https://github.com/llvm/llvm-project/pull/151472

Noticed this when checking the invariant that all phis in the header block must be header phis. I think there's a missing set of parentheses here, since otherwise it only cast<VPInstruction> when RecipeI isn't a VPInstruction.


>From 1ac30715bd635141afffa411820bb64280d9e523 Mon Sep 17 00:00:00 2001
From: Luke Lau <luke at igalia.com>
Date: Thu, 31 Jul 2025 16:24:49 +0800
Subject: [PATCH] [VPlan] Fix header phi VPInstruction verification. NFC

Noticed this when checking the invariant that all phis in the header block must be header phis. I think there's a missing set of parentheses here, since otherwise it only cast<VPInstruction> when RecipeI isn't a VPInstruction.
---
 llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp b/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp
index 57d01cbefbe26..b0de97ac5618d 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp
@@ -80,8 +80,8 @@ bool VPlanVerifier::verifyPhiRecipes(const VPBasicBlock *VPBB) {
       NumActiveLaneMaskPhiRecipes++;
 
     if (IsHeaderVPBB && !isa<VPHeaderPHIRecipe, VPWidenPHIRecipe>(*RecipeI) &&
-        !isa<VPInstruction>(*RecipeI) &&
-        cast<VPInstruction>(RecipeI)->getOpcode() == Instruction::PHI) {
+        !(isa<VPInstruction>(*RecipeI) &&
+          cast<VPInstruction>(RecipeI)->getOpcode() == Instruction::PHI)) {
       errs() << "Found non-header PHI recipe in header VPBB";
 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
       errs() << ": ";