[flang-commits] [flang] [flang][driver] Improve diagnostic for assembly inputs (PR #174316)

[Tarun Prabhu via flang-commits]

================
@@ -147,6 +147,31 @@ int main(int argc, const char **argv) {
   llvm::SmallVector<std::pair<int, const clang::driver::Command *>, 4>
       failingCommands;
 
+  // Reject assembly files as flang does not support assembling
+  if (c) {
----------------
tarunprabhu wrote:

Is this check necessary? Does `BuildCompilation` ever return nullptr? I think later in the code, `c` is used without a check which suggests that it doesn't, but that could be a bug. Do you mind checking?

https://github.com/llvm/llvm-project/pull/174316