From 4f05b362855cd10b35608a36b18a04647920309c Mon Sep 17 00:00:00 2001
From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Tue, 20 Jun 2017 01:31:53 +0000
Subject: [PATCH] Turn off "disable free" mode when preprocessing imported
 module files in -frewrite-imports mode.

This could end up accumulating a very large amount of intermediate state. Clear
it out after each module file is processed.

llvm-svn: 305764
---
 clang/lib/Frontend/Rewrite/FrontendActions.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/clang/lib/Frontend/Rewrite/FrontendActions.cpp b/clang/lib/Frontend/Rewrite/FrontendActions.cpp
index 2ccdc263951b..f64fbdafd597 100644
--- a/clang/lib/Frontend/Rewrite/FrontendActions.cpp
+++ b/clang/lib/Frontend/Rewrite/FrontendActions.cpp
@@ -243,6 +243,7 @@ public:
     Instance.createDiagnostics(
         new ForwardingDiagnosticConsumer(CI.getDiagnosticClient()),
         /*ShouldOwnClient=*/true);
+    Instance.getFrontendOpts().DisableFree = false;
     Instance.getFrontendOpts().Inputs.clear();
     Instance.getFrontendOpts().Inputs.emplace_back(
         Filename, InputKind(InputKind::Unknown, InputKind::Precompiled));