From 4a84ad7a2bfd1795357776164e3bf80a2600d924 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Fri, 13 Oct 2006 20:45:56 +0000
Subject: [PATCH] add the branch folding pass as a late cleanup pass for all
 targets.  For now it just deletes empty MBB's.  Soon it will do more :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30941 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/LLVMTargetMachine.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/CodeGen/LLVMTargetMachine.cpp b/lib/CodeGen/LLVMTargetMachine.cpp
index 6c4544a1173..18ab2184568 100644
--- a/lib/CodeGen/LLVMTargetMachine.cpp
+++ b/lib/CodeGen/LLVMTargetMachine.cpp
@@ -63,6 +63,9 @@ bool LLVMTargetMachine::addPassesToEmitFile(FunctionPassManager &PM,
   // Insert prolog/epilog code.  Eliminate abstract frame index references...
   PM.add(createPrologEpilogCodeInserter());
   
+  // Branch folding must be run after regalloc and prolog/epilog insertion.
+  PM.add(createBranchFoldingPass());
+  
   if (PrintMachineCode)  // Print the register-allocated code
     PM.add(createMachineFunctionPrinterPass(&std::cerr));