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Add option to createGVNPass to disable PRE.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85609 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2009-10-30 20:12:24 +00:00
parent 3efabd316f
commit 2f192c256c
2 changed files with 4 additions and 3 deletions
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2
include/llvm/Transforms/Scalar.h
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@ -271,7 +271,7 @@ extern const PassInfo *const LCSSAID;
// GVN - This pass performs global value numbering and redundant load // GVN - This pass performs global value numbering and redundant load
// elimination cotemporaneously. // elimination cotemporaneously.
// //
FunctionPass *createGVNPass(); FunctionPass *createGVNPass(bool NoPRE = false);
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// //

5
lib/Transforms/Scalar/GVN.cpp
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@ -669,9 +669,10 @@ namespace {
bool runOnFunction(Function &F); bool runOnFunction(Function &F);
public: public:
static char ID; // Pass identification, replacement for typeid static char ID; // Pass identification, replacement for typeid
GVN() : FunctionPass(&ID) { } GVN(bool nopre = false) : FunctionPass(&ID), NoPRE(nopre) { }
private: private:
bool NoPRE;
MemoryDependenceAnalysis *MD; MemoryDependenceAnalysis *MD;
DominatorTree *DT; DominatorTree *DT;
@ -710,7 +711,7 @@ namespace {
} }
// createGVNPass - The public interface to this file... // 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", static RegisterPass<GVN> X("gvn",
"Global Value Numbering"); "Global Value Numbering");