[llvm] [InlineSpiller] Drop unused elements in Virt2SiblingsMap. NFC (PR #147866)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-regalloc

Author: None (csstormq)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/147866.diff


1 Files Affected:

- (modified) llvm/lib/CodeGen/InlineSpiller.cpp (+1-1) 


``````````diff
diff --git a/llvm/lib/CodeGen/InlineSpiller.cpp b/llvm/lib/CodeGen/InlineSpiller.cpp
index ee08dc42dce57..18ec0bc1c050c 100644
--- a/llvm/lib/CodeGen/InlineSpiller.cpp
+++ b/llvm/lib/CodeGen/InlineSpiller.cpp
@@ -1657,7 +1657,7 @@ void HoistSpillHelper::hoistAllSpills() {
   for (unsigned i = 0, e = MRI.getNumVirtRegs(); i != e; ++i) {
     Register Reg = Register::index2VirtReg(i);
     Register Original = VRM.getPreSplitReg(Reg);
-    if (!MRI.def_empty(Reg))
+    if (!MRI.def_empty(Reg) && Original.id())
       Virt2SiblingsMap[Original].insert(Reg);
   }
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/147866