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Move the EnableFullLoadPRE flag from a separate command-line option to an

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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
This commit is contained in:
Bob Wilson 2010-02-26 19:09:47 +00:00
parent ad597f99d9
commit 8561dcd730
3 changed files with 9 additions and 7 deletions
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2
include/llvm/Support/StandardPasses.h
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@ -138,7 +138,7 @@ namespace llvm {
PM->add(createLoopUnrollPass()); // Unroll small loops
PM->add(createInstructionCombiningPass()); // Clean up after the unroller
if (OptimizationLevel > 1)
PM->add(createGVNPass()); // Remove redundancies
PM->add(createGVNPass(OptimizationLevel > 2)); // Remove redundancies
PM->add(createMemCpyOptPass()); // Remove memcpy / form memset
PM->add(createSCCPPass()); // Constant prop with SCCP

3
include/llvm/Transforms/Scalar.h
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@ -263,7 +263,8 @@ extern const PassInfo *const LCSSAID;
// GVN - This pass performs global value numbering and redundant load
// elimination cotemporaneously.
//
FunctionPass *createGVNPass(bool NoLoads = false);
FunctionPass *createGVNPass(bool EnableFullLoadPRE = true,
bool NoLoads = false);
//===----------------------------------------------------------------------===//
//

11
lib/Transforms/Scalar/GVN.cpp
View File

@ -60,7 +60,6 @@ STATISTIC(NumPRELoad, "Number of loads PRE'd");
static cl::opt<bool> EnablePRE("enable-pre",
cl::init(true), cl::Hidden);
static cl::opt<bool> EnableLoadPRE("enable-load-pre", cl::init(true));
static cl::opt<bool> EnableFullLoadPRE("enable-full-load-pre", cl::init(false));
//===----------------------------------------------------------------------===//
// ValueTable Class
@ -662,10 +661,12 @@ namespace {
bool runOnFunction(Function &F);
public:
static char ID; // Pass identification, replacement for typeid
explicit GVN(bool noloads = false)
: FunctionPass(&ID), NoLoads(noloads), MD(0) { }
explicit GVN(bool fullloadpre = true, bool noloads = false)
: FunctionPass(&ID), EnableFullLoadPRE(fullloadpre),
NoLoads(noloads), MD(0) { }
private:
bool EnableFullLoadPRE;
bool NoLoads;
MemoryDependenceAnalysis *MD;
DominatorTree *DT;
@ -710,8 +711,8 @@ namespace {
}
// createGVNPass - The public interface to this file...
FunctionPass *llvm::createGVNPass(bool NoLoads) {
return new GVN(NoLoads);
FunctionPass *llvm::createGVNPass(bool EnableFullLoadPRE, bool NoLoads) {
return new GVN(EnableFullLoadPRE, NoLoads);
}
static RegisterPass<GVN> X("gvn",