[llvm] [VPlan] Refine VPValue types in tryToFoldLiveIns (NFC) (PR #178183)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-vectorizers

Author: Ramkumar Ramachandra (artagnon)

<details>
<summary>Changes</summary>

tryToFoldLiveIns operates on live-ins (that is, both VPIRValues and VPSymbolicValues), and returns a VPIRValue. Clarify this.

---
Full diff: https://github.com/llvm/llvm-project/pull/178183.diff


1 Files Affected:

- (modified) llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp (+5-5) 


``````````diff
diff --git a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
index d1d5870d78a03..90e32b9e1ce1d 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
@@ -1128,17 +1128,17 @@ getOpcodeOrIntrinsicID(const VPSingleDefRecipe *R) {
 /// Try to fold \p R using InstSimplifyFolder. Will succeed and return a
 /// non-nullptr VPValue for a handled opcode or intrinsic ID if corresponding \p
 /// Operands are foldable live-ins.
-static VPValue *tryToFoldLiveIns(VPSingleDefRecipe &R,
-                                 ArrayRef<VPValue *> Operands,
-                                 const DataLayout &DL,
-                                 VPTypeAnalysis &TypeInfo) {
+static VPIRValue *tryToFoldLiveIns(VPSingleDefRecipe &R,
+                                   ArrayRef<VPValue *> Operands,
+                                   const DataLayout &DL,
+                                   VPTypeAnalysis &TypeInfo) {
   auto OpcodeOrIID = getOpcodeOrIntrinsicID(&R);
   if (!OpcodeOrIID)
     return nullptr;
 
   SmallVector<Value *, 4> Ops;
   for (VPValue *Op : Operands) {
-    if (!isa<VPIRValue, VPSymbolicValue>(Op))
+    if (!match(Op, m_LiveIn()))
       return nullptr;
     Value *V = Op->getUnderlyingValue();
     if (!V)

``````````

</details>


https://github.com/llvm/llvm-project/pull/178183