[llvm] [Cygwin] Fix global variable dll import (PR #121439)

[via llvm-commits]

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@@ -204,7 +204,8 @@ bool TargetMachine::shouldAssumeDSOLocal(const GlobalValue *GV) const {
     // don't assume the variables to be DSO local unless we actually know
     // that for sure. This only has to be done for variables; for functions
     // the linker can insert thunks for calling functions from another DLL.
-    if (TT.isWindowsGNUEnvironment() && GV->isDeclarationForLinker() &&
+    if ((TT.isWindowsGNUEnvironment() || TT.isWindowsCygwinEnvironment()) &&
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Berrysoft wrote:

Fixed.

https://github.com/llvm/llvm-project/pull/121439