[clang] [clang][Sema] Diagnose exceptions only in non-dependent context in discarded `try/catch/throw` blocks (PR #139859)

[Erich Keane via cfe-commits]

================
@@ -4410,6 +4409,21 @@ StmtResult Sema::ActOnCXXTryBlock(SourceLocation TryLoc, 
Stmt *TryBlock,
                             Handlers);
 }
 
+void Sema::DiagnoseExceptionUse(SourceLocation Loc, bool IsTry) {
+  const llvm::Triple &T = Context.getTargetInfo().getTriple();
+  const bool IsOpenMPGPUTarget =
+      getLangOpts().OpenMPIsTargetDevice && (T.isNVPTX() || T.isAMDGCN());
+
+  if (IsOpenMPGPUTarget || getLangOpts().CUDA)
+    return;
+
+  if (!getLangOpts().CXXExceptions &&
+      !getSourceManager().isInSystemHeader(Loc) &&
+      !CurContext->isDependentContext()) {
----------------
erichkeane wrote:

Don't use curley braces on single-line `if` bodies.

https://github.com/llvm/llvm-project/pull/139859
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