Add option to createGVNPass to disable PRE.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85609 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 2 deletions

diff --git a/lib/Transforms/Scalar/GVN.cpp b/lib/Transforms/Scalar/GVN.cpp
index dd8859b5e8..33ad4e1059 100644
--- a/lib/Transforms/Scalar/GVN.cpp
+++ b/lib/Transforms/Scalar/GVN.cpp
@@ -669,9 +669,10 @@ namespace {
     bool runOnFunction(Function &F);
   public:
     static char ID; // Pass identification, replacement for typeid
-    GVN() : FunctionPass(&ID) { }
+    GVN(bool nopre = false) : FunctionPass(&ID), NoPRE(nopre) { }
 
   private:
+    bool NoPRE;
     MemoryDependenceAnalysis *MD;
     DominatorTree *DT;
 
@@ -710,7 +711,7 @@ namespace {
 }
 
 // createGVNPass - The public interface to this file...
-FunctionPass *llvm::createGVNPass() { return new GVN(); }
+FunctionPass *llvm::createGVNPass(bool NoPRE) { return new GVN(NoPRE); }
 
 static RegisterPass<GVN> X("gvn",
                            "Global Value Numbering");