[clang] [clang-repl] Disable EmulatedTLS on Windows (PR #127468)

[Aaron Jomy via cfe-commits]

https://github.com/aaronj0 created https://github.com/llvm/llvm-project/pull/127468

When running the clang-repl interpreter on windows, calling

```cpp
Interpreter->Process(R"(
                     #include <iostream>
                     void f1(std::string &s) { std::cout<< s.c_str(); };
                      )");
```

Does not work, due to missing emulated tls symbols `__emutls_get_address` and `__emutls_v._Init_thread_epoch`. This requires disabling the option when creating the executor, in the `orc::JITTargetMachineBuilder`

cc @vgvassilev 

>From 28a34270aba842b10b35765dc55f8ea6b2dd5428 Mon Sep 17 00:00:00 2001
From: Aaron  Jomy <75925957+aaronj0 at users.noreply.github.com>
Date: Mon, 17 Feb 2025 11:22:23 +0100
Subject: [PATCH] [clang-repl] Disable EmulatedTLS on Windows

When running the clang-repl interpreter on windows, calling

```cpp
Interpreter->Process(R"(
                     #include <iostream>
                     void f1(std::string &s) { std::cout<< s.c_str(); };
                      )");
```

Does not work, due to missing emulated tls symbols `__emutls_get_address` and `__emutls_v._Init_thread_epoch`. This requires disabling the option when creating the executor, in the `orc::JITTargetMachineBuilder`
---
 clang/lib/Interpreter/Interpreter.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/clang/lib/Interpreter/Interpreter.cpp b/clang/lib/Interpreter/Interpreter.cpp
index fa4c1439c9261..65e4e58f22a84 100644
--- a/clang/lib/Interpreter/Interpreter.cpp
+++ b/clang/lib/Interpreter/Interpreter.cpp
@@ -597,6 +597,9 @@ llvm::Error Interpreter::CreateExecutor() {
     auto JTMB = createJITTargetMachineBuilder(TT);
     if (!JTMB)
       return JTMB.takeError();
+#if defined(_WIN32)
+    JTMB->getOptions().EmulatedTLS = false;
+#endif
     auto JB = IncrementalExecutor::createDefaultJITBuilder(std::move(*JTMB));
     if (!JB)
       return JB.takeError();