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

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-vectorizers

Author: Luke Lau (lukel97)

<details>
<summary>Changes</summary>

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.


---
Full diff: https://github.com/llvm/llvm-project/pull/151472.diff


1 Files Affected:

- (modified) llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp (+2-2) 


``````````diff
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() << ": ";

``````````

</details>


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