[llvm] [PatternMatch] m_SpecificMask should pass expected mask by Value. NFC (PR #121527)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-ir

Author: Craig Topper (topperc)

<details>
<summary>Changes</summary>

Unlike m_Mask, we don't need to modify a variable owned by the caller so we should pass the ArrayRef by value or const reference.

---
Full diff: https://github.com/llvm/llvm-project/pull/121527.diff


1 Files Affected:

- (modified) llvm/include/llvm/IR/PatternMatch.h (+3-3) 


``````````diff
diff --git a/llvm/include/llvm/IR/PatternMatch.h b/llvm/include/llvm/IR/PatternMatch.h
index cc0e8d598ff1ea..b37f967191aaa8 100644
--- a/llvm/include/llvm/IR/PatternMatch.h
+++ b/llvm/include/llvm/IR/PatternMatch.h
@@ -1844,9 +1844,9 @@ struct m_ZeroMask {
 };
 
 struct m_SpecificMask {
-  ArrayRef<int> &MaskRef;
-  m_SpecificMask(ArrayRef<int> &MaskRef) : MaskRef(MaskRef) {}
-  bool match(ArrayRef<int> Mask) { return MaskRef == Mask; }
+  ArrayRef<int> Val;
+  m_SpecificMask(ArrayRef<int> Val) : Val(Val) {}
+  bool match(ArrayRef<int> Mask) { return Val == Mask; }
 };
 
 struct m_SplatOrPoisonMask {

``````````

</details>


https://github.com/llvm/llvm-project/pull/121527