[llvm] [MC][ELF] Fix printing group signature symbols. (PR #112543)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-mc

Author: Ivan Kosarev (kosarev)

<details>
<summary>Changes</summary>

They may be not known.

Change-Id: I66543240af2d10d77b4f7f23c06553356b3ec767

---
Full diff: https://github.com/llvm/llvm-project/pull/112543.diff


1 Files Affected:

- (modified) llvm/lib/MC/MCSectionELF.cpp (+4-2) 


``````````diff
diff --git a/llvm/lib/MC/MCSectionELF.cpp b/llvm/lib/MC/MCSectionELF.cpp
index 25e62b70b5e2a0..3dc9a67e63939a 100644
--- a/llvm/lib/MC/MCSectionELF.cpp
+++ b/llvm/lib/MC/MCSectionELF.cpp
@@ -191,8 +191,10 @@ void MCSectionELF::printSwitchToSection(const MCAsmInfo &MAI, const Triple &T,
   }
 
   if (Flags & ELF::SHF_GROUP) {
-    OS << ",";
-    printName(OS, Group.getPointer()->getName());
+    if (const MCSymbolELF *Signature = Group.getPointer()) {
+      OS << ",";
+      printName(OS, Signature->getName());
+    }
     if (isComdat())
       OS << ",comdat";
   }

``````````

</details>


https://github.com/llvm/llvm-project/pull/112543