[llvm] Support llvm::Any across shared libraries on windows (#108051)

This is part of the effort to support for enabling plugins on windows by
adding better support for building llvm as a DLL. The export macros used
here were added in #96630

Since shared library symbols aren't deduplicated across multiple
libraries on windows like Linux we have to manually explicitly import
and export `Any::TypeId` template instantiations for the uses of
`llvm::Any` in the LLVM codebase to support LLVM Windows shared library
builds.
This change ensures that external code, including LLVM's own tests, can
use PassManager callbacks when LLVM is built as a DLL.

I also removed the only use of llvm::Any for LoopNest that only existed
in debug code and there also doesn't seem to be any code creating
`Any<LoopNest>`

1 files changed, 1 insertions, 4 deletions

diff --git a/llvm/lib/Transforms/Scalar/LoopPassManager.cpp b/llvm/lib/Transforms/Scalar/LoopPassManager.cpp
index 5ef25c2..d3bcfb8 100644
--- a/llvm/lib/Transforms/Scalar/LoopPassManager.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopPassManager.cpp
@@ -269,12 +269,9 @@ PreservedAnalyses FunctionToLoopPassAdaptor::run(Function &F,
   PI.pushBeforeNonSkippedPassCallback([&LAR, &LI](StringRef PassID, Any IR) {
     if (isSpecialPass(PassID, {"PassManager"}))
       return;
-    assert(llvm::any_cast<const Loop *>(&IR) ||
-           llvm::any_cast<const LoopNest *>(&IR));
+    assert(llvm::any_cast<const Loop *>(&IR));
     const Loop **LPtr = llvm::any_cast<const Loop *>(&IR);
     const Loop *L = LPtr ? *LPtr : nullptr;
-    if (!L)
-      L = &llvm::any_cast<const LoopNest *>(IR)->getOutermostLoop();
     assert(L && "Loop should be valid for printing");
 
     // Verify the loop structure and LCSSA form before visiting the loop.