From f50dbc44bae68329e24a262b0bacf761a4dff186 Mon Sep 17 00:00:00 2001
From: Tobias Grosser <grosser@fim.uni-passau.de>
Date: Sun, 23 Oct 2011 20:59:11 +0000
Subject: [PATCH] RegisterPasses: Allow to disable code generation.

llvm-svn: 142765
---
 polly/lib/RegisterPasses.cpp                 | 8 +++++++-
 polly/www/example_load_Polly_into_clang.html | 6 ++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/polly/lib/RegisterPasses.cpp b/polly/lib/RegisterPasses.cpp
index 4fc027d7d111..ef91b365a8e4 100644
--- a/polly/lib/RegisterPasses.cpp
+++ b/polly/lib/RegisterPasses.cpp
@@ -28,6 +28,10 @@
 
 using namespace llvm;
 
+static cl::opt<bool>
+DisableCodegen("polly-no-codegen",
+       cl::desc("Disable Polly Code Generation"), cl::Hidden,
+       cl::init(false));
 static cl::opt<bool>
 PollyViewer("enable-polly-viewer",
        cl::desc("Enable the Polly DOT viewer in -O3"), cl::Hidden,
@@ -117,7 +121,9 @@ static void registerPollyPasses(const llvm::PassManagerBuilder &Builder,
     PM.add(polly::createDOTOnlyPrinterPass());
 
   PM.add(polly::createIslScheduleOptimizerPass());
-  PM.add(polly::createCodeGenerationPass());
+
+  if (!DisableCodegen)
+    PM.add(polly::createCodeGenerationPass());
 }
 
 // Execute Polly together with a set of preparing passes.
diff --git a/polly/www/example_load_Polly_into_clang.html b/polly/www/example_load_Polly_into_clang.html
index 877d96e341be..56479d75d0d7 100644
--- a/polly/www/example_load_Polly_into_clang.html
+++ b/polly/www/example_load_Polly_into_clang.html
@@ -47,6 +47,12 @@ command line.
 To limit the execution of Polly to a single function, use the option
 '-polly-detect-only=functionname'.
 
+<h3>Disable LLVM-IR generation</h3>
+Polly normally regenerates LLVM-IR from the Polyhedral representation. To only
+see the effects of the preparing transformation, but to disable Polly code
+generation add the option 'polly-no-codegen'.
+
+
 </div>
 </body>
 </html>