[llvm] [CodeGen][NFC] Update a comment. (PR #180531)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-regalloc

Author: Mikhail Gudim (mgudim)

<details>
<summary>Changes</summary>

Since a register can represent a negative frame index, remove "non-negative" from the comment.

---
Full diff: https://github.com/llvm/llvm-project/pull/180531.diff


1 Files Affected:

- (modified) llvm/include/llvm/CodeGen/Register.h (+1-1) 


``````````diff
diff --git a/llvm/include/llvm/CodeGen/Register.h b/llvm/include/llvm/CodeGen/Register.h
index f375af5808d1c..3bc781b3f0fe0 100644
--- a/llvm/include/llvm/CodeGen/Register.h
+++ b/llvm/include/llvm/CodeGen/Register.h
@@ -47,7 +47,7 @@ class Register {
     return Register::StackSlotZero <= Reg && Reg < Register::VirtualRegFlag;
   }
 
-  /// Convert a non-negative frame index to a stack slot register value.
+  /// Convert a frame index to a stack slot register value.
   static Register index2StackSlot(int FI) {
     assert(isInt<MaxFrameIndexBitwidth>(FI) &&
            "Frame index must be at most 30 bits.");

``````````

</details>


https://github.com/llvm/llvm-project/pull/180531