From 76d94d3eedf058644a101510597b90d1f441b710 Mon Sep 17 00:00:00 2001
From: Jonas Hahnfeld <jonas.hahnfeld@cern.ch>
Date: Sat, 4 Feb 2023 21:24:44 +0100
Subject: [PATCH] Revert "[ORC] Drop Comdat when discarding IR symbol"

A number of AArch64 bots report errors in clang-repl, for example
https://lab.llvm.org/buildbot/#/builders/197/builds/3920

This reverts commit 87d7838202267a011639fcbf97263556ccf091dc.
---
 llvm/lib/ExecutionEngine/Orc/Layer.cpp                 |  4 ----
 .../test/ExecutionEngine/Orc/Inputs/weak-comdat-def.ll | 12 ------------
 llvm/test/ExecutionEngine/Orc/weak-comdat.ll           | 18 ------------------
 3 files changed, 34 deletions(-)
 delete mode 100644 llvm/test/ExecutionEngine/Orc/Inputs/weak-comdat-def.ll
 delete mode 100644 llvm/test/ExecutionEngine/Orc/weak-comdat.ll

diff --git a/llvm/lib/ExecutionEngine/Orc/Layer.cpp b/llvm/lib/ExecutionEngine/Orc/Layer.cpp
index 3368d32..95380d91 100644
--- a/llvm/lib/ExecutionEngine/Orc/Layer.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/Layer.cpp
@@ -125,10 +125,6 @@ void IRMaterializationUnit::discard(const JITDylib &JD,
   assert(!I->second->isDeclaration() &&
          "Discard should only apply to definitions");
   I->second->setLinkage(GlobalValue::AvailableExternallyLinkage);
-  // According to the IR verifier, "Declaration[s] may not be in a Comdat!"
-  // Remove it, if this is a GlobalObject.
-  if (auto *GO = dyn_cast<GlobalObject>(I->second))
-    GO->setComdat(nullptr);
   SymbolToDefinition.erase(I);
 }
 
diff --git a/llvm/test/ExecutionEngine/Orc/Inputs/weak-comdat-def.ll b/llvm/test/ExecutionEngine/Orc/Inputs/weak-comdat-def.ll
deleted file mode 100644
index d35ead0..0000000
--- a/llvm/test/ExecutionEngine/Orc/Inputs/weak-comdat-def.ll
+++ /dev/null
@@ -1,12 +0,0 @@
-define i32 @g() {
-entry:
-  ret i32 0
-}
-
-$f = comdat nodeduplicate
-
-define i32 @f() comdat {
-entry:
-  %0 = call i32 @g()
-  ret i32 %0
-}
diff --git a/llvm/test/ExecutionEngine/Orc/weak-comdat.ll b/llvm/test/ExecutionEngine/Orc/weak-comdat.ll
deleted file mode 100644
index e1e1ab0..0000000
--- a/llvm/test/ExecutionEngine/Orc/weak-comdat.ll
+++ /dev/null
@@ -1,18 +0,0 @@
-; RUN: lli -extra-module %p/Inputs/weak-comdat-def.ll %s
-; UNSUPPORTED: target={{.*}}-darwin{{.*}}
-
-declare i32 @g()
-
-$f = comdat nodeduplicate
-
-define weak i32 @f() comdat {
-entry:
-  %0 = call i32 @g()
-  ret i32 %0
-}
-
-define i32 @main() {
-entry:
-  %0 = call i32 @f()
-  ret i32 %0
-}
-- 
2.7.4