Makefile generator: Improve dependency collection performance

Use the output artifact's children directly rather than "manually"
collecting the input artifacts from the rule input tags.

Change-Id: I3a31d24471a963c1881e89d76da61b0bcf28cc1a
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

1 files changed, 7 insertions, 9 deletions

diff --git a/src/lib/corelib/api/project.cpp b/src/lib/corelib/api/project.cpp
index 69c7edf77..bad18cab9 100644
--- a/src/lib/corelib/api/project.cpp
+++ b/src/lib/corelib/api/project.cpp
@@ -801,16 +801,14 @@ ProjectTransformerData ProjectPrivate::transformerData()
         ProductTransformerData productTransformerData;
         for (const Transformer * const t : allTransformers) {
             TransformerData tData;
-            for (Artifact * const a : t->inputs)
-                tData.d->inputs << createArtifactData(a, product, targetArtifacts);
-            for (Artifact * const a : t->explicitlyDependsOn)
-                tData.d->inputs << createArtifactData(a, product, targetArtifacts);
-            for (Artifact * const a
-                 : RulesApplicator::collectAuxiliaryInputs(t->rule.get(), product.get())) {
-                tData.d->inputs << createArtifactData(a, product, targetArtifacts);
-            }
-            for (Artifact * const a : t->outputs)
+            Set<const Artifact *> allInputs;
+            for (Artifact * const a : t->outputs) {
                 tData.d->outputs << createArtifactData(a, product, targetArtifacts);
+                for (const Artifact * const child : filterByType<Artifact>(a->children))
+                    allInputs << child;
+            }
+            for (const Artifact * const input : allInputs)
+                tData.d->inputs << createArtifactData(input, product, targetArtifacts);
             tData.d->commands = ruleCommandListForTransformer(t);
             productTransformerData << tData;
         }