From 369287bab599c2c515eab4ffd8a7f3bab227d346 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Thu, 18 Mar 2004 03:48:06 +0000
Subject: [PATCH] The code extractor needs dominator info.  Provide it

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12483 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/IPO/LoopExtractor.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/lib/Transforms/IPO/LoopExtractor.cpp b/lib/Transforms/IPO/LoopExtractor.cpp
index 4161e41930e..5b6aaa90055 100644
--- a/lib/Transforms/IPO/LoopExtractor.cpp
+++ b/lib/Transforms/IPO/LoopExtractor.cpp
@@ -18,6 +18,7 @@
 #include "llvm/iTerminators.h"
 #include "llvm/Module.h"
 #include "llvm/Pass.h"
+#include "llvm/Analysis/Dominators.h"
 #include "llvm/Analysis/LoopInfo.h"
 #include "llvm/Transforms/Scalar.h"
 #include "llvm/Transforms/Utils/FunctionUtils.h"
@@ -35,6 +36,7 @@ namespace {
     virtual bool runOnFunction(Function &F);
     
     virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+      AU.addRequired<DominatorSet>();
       AU.addRequired<LoopInfo>();
       AU.addRequiredID(LoopSimplifyID);
     }
@@ -59,6 +61,8 @@ bool LoopExtractor::runOnFunction(Function &F) {
   if (LI.begin() == LI.end())
     return false;
 
+  DominatorSet &DS = getAnalysis<DominatorSet>();
+
   // If there is more than one top-level loop in this function, extract all of
   // the loops.
   bool Changed = false;
@@ -66,7 +70,7 @@ bool LoopExtractor::runOnFunction(Function &F) {
     for (LoopInfo::iterator i = LI.begin(), e = LI.end(); i != e; ++i) {
       if (NumLoops == 0) return Changed;
       --NumLoops;
-      Changed |= (ExtractLoop(*i) != 0);
+      Changed |= ExtractLoop(DS, *i) != 0;
     }
   } else {
     // Otherwise there is exactly one top-level loop.  If this function is more
@@ -93,7 +97,7 @@ bool LoopExtractor::runOnFunction(Function &F) {
     if (ShouldExtractLoop) {
       if (NumLoops == 0) return Changed;
       --NumLoops;
-      Changed |= (ExtractLoop(TLL) != 0);
+      Changed |= ExtractLoop(DS, TLL) != 0;
     } else {
       // Okay, this function is a minimal container around the specified loop.
       // If we extract the loop, we will continue to just keep extracting it
@@ -102,7 +106,7 @@ bool LoopExtractor::runOnFunction(Function &F) {
       for (Loop::iterator i = TLL->begin(), e = TLL->end(); i != e; ++i) {
         if (NumLoops == 0) return Changed;
         --NumLoops;
-        Changed |= (ExtractLoop(*i) != 0);
+        Changed |= ExtractLoop(DS, *i) != 0;
       }
     }
   }