clean: Improve performance in presence of dynamic dependencies

Add code to check "pending" so as to avoid loading dyndep files that
have already been loaded.  This was missed by commit a3cbb4d (clean:
remove outputs specified by dyndep files, 2019-02-12,
v1.10.0~1^2~53^2~4).

1 files changed, 2 insertions, 1 deletions

diff --git a/src/clean.cc b/src/clean.cc
index 6827352..ceffe64 100644
--- a/src/clean.cc
+++ b/src/clean.cc
@@ -293,7 +293,8 @@ void Cleaner::LoadDyndeps() {
   // Load dyndep files that exist, before they are cleaned.
   for (vector<Edge*>::iterator e = state_->edges_.begin();
        e != state_->edges_.end(); ++e) {
-    if (Node* dyndep = (*e)->dyndep_) {
+    Node* dyndep;
+    if ((dyndep = (*e)->dyndep_) && dyndep->dyndep_pending()) {
       // Capture and ignore errors loading the dyndep file.
       // We clean as much of the graph as we know.
       std::string err;