From d82c8068a3243a9f021e7aa7cf5c4f0c1d2bd89c Mon Sep 17 00:00:00 2001
From: Christian Kamm <kamm@incasoftware.de>
Date: Sun, 12 Oct 2008 15:33:14 +0200
Subject: [PATCH] Always run SimplifyCFG to workaround LLVM bug 2613.

---
 gen/toobj.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gen/toobj.cpp b/gen/toobj.cpp
index 41a68724..5fe2a2c2 100644
--- a/gen/toobj.cpp
+++ b/gen/toobj.cpp
@@ -20,6 +20,7 @@
 #include "llvm/Module.h"
 #include "llvm/ModuleProvider.h"
 #include "llvm/PassManager.h"
+#include "llvm/LinkAllPasses.h"
 #include "llvm/System/Program.h"
 #include "llvm/System/Path.h"
 #include "llvm/Support/raw_ostream.h"
@@ -162,6 +163,12 @@ void Module::genobjfile(int multiobj, char** envp)
         }
     }
 
+    // always run this pass to eliminate dead code that breaks debug info
+    llvm::PassManager pm;
+    pm.add(new llvm::TargetData(ir.module));
+    pm.add(llvm::createCFGSimplificationPass());
+    pm.run(*ir.module);
+
     // run optimizer
     ldc_optimize_module(ir.module, global.params.optimizeLevel, global.params.llvmInline);