Re-commit r344234 "clang-cl: Add /showFilenames option (PR31957)"

The test was failing on e.g. PPC which can't target Windows. Fix by
requiring X86 target in the test. Also, make sure the output goes to a
temporary directory, since CWD may not be writable.

llvm-svn: 344462

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/lib/Driver/Job.cpp b/clang/lib/Driver/Job.cpp
index b6322b6ce2b..8d1dfbe12d7 100644
--- a/clang/lib/Driver/Job.cpp
+++ b/clang/lib/Driver/Job.cpp
@@ -316,6 +316,12 @@ void Command::setEnvironment(llvm::ArrayRef<const char *> NewEnvironment) {
 
 int Command::Execute(ArrayRef<llvm::Optional<StringRef>> Redirects,
                      std::string *ErrMsg, bool *ExecutionFailed) const {
+  if (PrintInputFilenames) {
+    for (const char *Arg : InputFilenames)
+      llvm::outs() << llvm::sys::path::filename(Arg) << "\n";
+    llvm::outs().flush();
+  }
+
   SmallVector<const char*, 128> Argv;
 
   Optional<ArrayRef<StringRef>> Env;