[llvm] [mcp-frameinst: 2/3]: [MCP][NFC] Opinionated refactoring (PR #186239)

[Scott Linder via llvm-commits]

slinder1 wrote:

<details>
<summary>🛠️ Changes since last push (click to expand):</summary>

```diff
diff --git b/llvm/lib/CodeGen/MachineCopyPropagation.cpp a/llvm/lib/CodeGen/MachineCopyPropagation.cpp
@@ -659,7 +659,7 @@ bool MachineCopyPropagation::isBackwardPropagatableCopy(
   if (!Dst || !Src)
     return false;
 
-  if (isNeverRedundant(Src))
+  if (isNeverRedundant(Dst) || isNeverRedundant(Src))
     return false;
 
   return CopyOperands.Source->isRenamable() && CopyOperands.Source->isKill();

```
</details>

https://github.com/llvm/llvm-project/pull/186239