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authorEvan Cheng <evan.cheng@apple.com>2009-10-30 20:12:24 +0000
committerEvan Cheng <evan.cheng@apple.com>2009-10-30 20:12:24 +0000
commit2f192c256c28f3b6c018f59e96380cd26f59c767 (patch)
treef78f39f43c28d84210560c5a1ad4b5f8fdd06b38
parent3efabd316f05c8c9f82a62424721532c474fc067 (diff)
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Add option to createGVNPass to disable PRE.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85609 91177308-0d34-0410-b5e6-96231b3b80d8
-rw-r--r--include/llvm/Transforms/Scalar.h2
-rw-r--r--lib/Transforms/Scalar/GVN.cpp5
2 files changed, 4 insertions, 3 deletions
diff --git a/include/llvm/Transforms/Scalar.h b/include/llvm/Transforms/Scalar.h
index f019d35..e01b5dd 100644
--- a/include/llvm/Transforms/Scalar.h
+++ b/include/llvm/Transforms/Scalar.h
@@ -271,7 +271,7 @@ extern const PassInfo *const LCSSAID;
// GVN - This pass performs global value numbering and redundant load
// elimination cotemporaneously.
//
-FunctionPass *createGVNPass();
+FunctionPass *createGVNPass(bool NoPRE = false);
//===----------------------------------------------------------------------===//
//
diff --git a/lib/Transforms/Scalar/GVN.cpp b/lib/Transforms/Scalar/GVN.cpp
index dd8859b..33ad4e1 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");