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Move the EnableFullLoadPRE flag from a separate command-line option to an
argument of createGVNPass and set it automatically for -O3. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97245 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -138,7 +138,7 @@ namespace llvm {
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PM->add(createLoopUnrollPass()); // Unroll small loops
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PM->add(createInstructionCombiningPass()); // Clean up after the unroller
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if (OptimizationLevel > 1)
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PM->add(createGVNPass()); // Remove redundancies
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PM->add(createGVNPass(OptimizationLevel > 2)); // Remove redundancies
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PM->add(createMemCpyOptPass()); // Remove memcpy / form memset
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PM->add(createSCCPPass()); // Constant prop with SCCP
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@ -263,7 +263,8 @@ extern const PassInfo *const LCSSAID;
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// GVN - This pass performs global value numbering and redundant load
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// elimination cotemporaneously.
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//
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FunctionPass *createGVNPass(bool NoLoads = false);
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FunctionPass *createGVNPass(bool EnableFullLoadPRE = true,
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bool NoLoads = false);
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//===----------------------------------------------------------------------===//
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//
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@ -60,7 +60,6 @@ STATISTIC(NumPRELoad, "Number of loads PRE'd");
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static cl::opt<bool> EnablePRE("enable-pre",
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cl::init(true), cl::Hidden);
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static cl::opt<bool> EnableLoadPRE("enable-load-pre", cl::init(true));
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static cl::opt<bool> EnableFullLoadPRE("enable-full-load-pre", cl::init(false));
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//===----------------------------------------------------------------------===//
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// ValueTable Class
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@ -662,10 +661,12 @@ namespace {
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bool runOnFunction(Function &F);
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public:
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static char ID; // Pass identification, replacement for typeid
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explicit GVN(bool noloads = false)
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: FunctionPass(&ID), NoLoads(noloads), MD(0) { }
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explicit GVN(bool fullloadpre = true, bool noloads = false)
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: FunctionPass(&ID), EnableFullLoadPRE(fullloadpre),
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NoLoads(noloads), MD(0) { }
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private:
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bool EnableFullLoadPRE;
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bool NoLoads;
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MemoryDependenceAnalysis *MD;
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DominatorTree *DT;
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@ -710,8 +711,8 @@ namespace {
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}
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// createGVNPass - The public interface to this file...
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FunctionPass *llvm::createGVNPass(bool NoLoads) {
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return new GVN(NoLoads);
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FunctionPass *llvm::createGVNPass(bool EnableFullLoadPRE, bool NoLoads) {
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return new GVN(EnableFullLoadPRE, NoLoads);
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}
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static RegisterPass<GVN> X("gvn",
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