Driver: Automatically suppress warnings for duplicate versions of
flags which were used for something.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68416 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Driver.cpp b/lib/Driver/Driver.cpp
index 7890e72..74c4b07 100644
--- a/lib/Driver/Driver.cpp
+++ b/lib/Driver/Driver.cpp
@@ -807,9 +807,29 @@
// FIXME: It would be nice to be able to send the argument to the
// Diagnostic, so that extra values, position, and so on could be
// printed.
- if (!A->isClaimed())
+ if (!A->isClaimed()) {
+ // Suppress the warning automatically if this is just a flag,
+ // and it is an instance of an argument we already claimed.
+ const Option &Opt = A->getOption();
+ if (isa<FlagOption>(Opt)) {
+ bool DuplicateClaimed = false;
+
+ // FIXME: Use iterator.
+ for (ArgList::const_iterator it = C.getArgs().begin(),
+ ie = C.getArgs().end(); it != ie; ++it) {
+ if ((*it)->isClaimed() && (*it)->getOption().matches(Opt.getId())) {
+ DuplicateClaimed = true;
+ break;
+ }
+ }
+
+ if (DuplicateClaimed)
+ continue;
+ }
+
Diag(clang::diag::warn_drv_unused_argument)
<< A->getAsString(C.getArgs());
+ }
}
}