Revert "Bail on compilation as soon as a job fails."

This reverts commit r260448.

It was causing Driver/output-file-cleanup.c to fail.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@260522 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Driver/Compilation.cpp

@@ -163,17 +163,39 @@ int Compilation::ExecuteCommand(const Command &C,
   return ExecutionFailed ? 1 : Res;
 }
 
-void Compilation::ExecuteJobs(
-    const JobList &Jobs,
-    SmallVectorImpl<std::pair<int, const Command *>> &FailingCommands) const {
+typedef SmallVectorImpl< std::pair<int, const Command *> > FailingCommandList;
+
+static bool ActionFailed(const Action *A,
+                         const FailingCommandList &FailingCommands) {
+
+  if (FailingCommands.empty())
+    return false;
+
+  for (FailingCommandList::const_iterator CI = FailingCommands.begin(),
+         CE = FailingCommands.end(); CI != CE; ++CI)
+    if (A == &(CI->second->getSource()))
+      return true;
+
+  for (Action::const_iterator AI = A->begin(), AE = A->end(); AI != AE; ++AI)
+    if (ActionFailed(*AI, FailingCommands))
+      return true;
+
+  return false;
+}
+
+static bool InputsOk(const Command &C,
+                     const FailingCommandList &FailingCommands) {
+  return !ActionFailed(&C.getSource(), FailingCommands);
+}
+
+void Compilation::ExecuteJobs(const JobList &Jobs,
+                              FailingCommandList &FailingCommands) const {
   for (const auto &Job : Jobs) {
+    if (!InputsOk(Job, FailingCommands))
+      continue;
     const Command *FailingCommand = nullptr;
-    if (int Res = ExecuteCommand(Job, FailingCommand)) {
+    if (int Res = ExecuteCommand(Job, FailingCommand))
       FailingCommands.push_back(std::make_pair(Res, FailingCommand));
-      // Bail as soon as one command fails, so we don't output duplicate error
-      // messages if we die on e.g. the same file.
-      return;
-    }
   }
 }