[clang] [lld] [llvm] [llvm][lld][clang] Delay initializing TargetOptions in LTO builds until a Triple is available (PR #179509)

[Teresa Johnson via cfe-commits]

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@@ -2089,14 +2097,15 @@ Error LTO::runThinLTO(AddStreamFn AddStream, FileCache 
Cache,
       ThinLTO.ModulesToCompile ? *ThinLTO.ModulesToCompile : ThinLTO.ModuleMap;
 
   auto RunBackends = [&](ThinBackendProc *BackendProcess) -> Error {
+    Triple TheTriple = RegularLTO.CombinedModule->getTargetTriple();
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teresajohnson wrote:

Thanks for checking that. I traced through the code to see where this gets set 
up, see my other comment

https://github.com/llvm/llvm-project/pull/179509
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