Prevent the -save-temps flag from modifying the input file if the input filename
conflicts with a to be produced temp filename.
rdar://9724657
llvm-svn: 135308
diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 3a78b6a..616207b 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -1252,6 +1252,15 @@
NamedOutput = C.getArgs().MakeArgString(Suffixed.c_str());
}
+ // If we're saving temps and the temp filename conflicts with the input
+ // filename, then avoid overwriting input file.
+ if (!AtTopLevel && C.getArgs().hasArg(options::OPT_save_temps) &&
+ NamedOutput == BaseName) {
+ std::string TmpName =
+ GetTemporaryPath(types::getTypeTempSuffix(JA.getType()));
+ return C.addTempFile(C.getArgs().MakeArgString(TmpName.c_str()));
+ }
+
// As an annoying special case, PCH generation doesn't strip the pathname.
if (JA.getType() == types::TY_PCH) {
llvm::sys::path::remove_filename(BasePath);