[clang] Trying to fix undefined symbol error caused by iterator variable (PR #141507)

[Eli Friedman via cfe-commits]

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@@ -2969,6 +2969,11 @@ static LValue EmitGlobalVarDeclLValue(CodeGenFunction 
&CGF,
 
   llvm::Value *V = CGF.CGM.GetAddrOfGlobalVar(VD);
 
+  if (VD->hasAttr<OMPIteratorAttr>()) {
+    llvm::GlobalVariable *Var = llvm::dyn_cast<llvm::GlobalVariable>(V);
+    Var->setInitializer(CGF.CGM.EmitNullConstant(E->getType()));
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efriedma-quic wrote:

This is not the place to set an initializer for a variable.

For most variable definitions, there's a single location where it makes sense 
to "define" the variable.

https://github.com/llvm/llvm-project/pull/141507
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