[llvm] [WebAssembly] Add tests for EH/SjLj option errors (PR #93583)

[Heejin Ahn via llvm-commits]

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@@ -388,15 +388,29 @@ using WebAssembly::WasmEnableEmSjLj;
 using WebAssembly::WasmEnableSjLj;
 
 static void basicCheckForEHAndSjLj(TargetMachine *TM) {
-  // Before checking, we make sure TargetOptions.ExceptionModel is the same as
+
+  // You can't enable two modes of EH at the same time
+  if (WasmEnableEmEH && WasmEnableEH)
+    report_fatal_error(
+        "-enable-emscripten-cxx-exceptions not allowed with -wasm-enable-eh");
+  // You can't enable two modes of SjLj at the same time
+  if (WasmEnableEmSjLj && WasmEnableSjLj)
+    report_fatal_error(
+        "-enable-emscripten-sjlj not allowed with -wasm-enable-sjlj");
+  // You can't mix Emscripten EH with Wasm SjLj.
+  if (WasmEnableEmEH && WasmEnableSjLj)
+    report_fatal_error(
+        "-enable-emscripten-cxx-exceptions not allowed with -wasm-enable-sjlj");
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aheejin wrote:

This was just moved from below

https://github.com/llvm/llvm-project/pull/93583