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Add some statistics to SSI so we can see what it's up to.

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Add an -ssi-everything pass which calls createSSI on everything in the function.

llvm-svn: 75135
This commit is contained in:
Nick Lewycky 2009-07-09 15:33:14 +00:00
parent 946c6e3df5
commit 02ee56adb2
1 changed files with 43 additions and 0 deletions
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43
lib/Transforms/Utils/SSI.cpp
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@ -23,6 +23,7 @@
#include "llvm/Transforms/Scalar.h" #include "llvm/Transforms/Scalar.h"
#include "llvm/Transforms/Utils/SSI.h" #include "llvm/Transforms/Utils/SSI.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/Dominators.h" #include "llvm/Analysis/Dominators.h"
using namespace llvm; using namespace llvm;
@ -32,6 +33,9 @@ static const std::string SSI_SIG = "SSI_sigma";
static const unsigned UNSIGNED_INFINITE = ~0U; static const unsigned UNSIGNED_INFINITE = ~0U;
STATISTIC(NumSigmaInserted, "Number of sigma functions inserted");
STATISTIC(NumPhiInserted, "Number of phi functions inserted");
void SSI::getAnalysisUsage(AnalysisUsage &AU) const { void SSI::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<DominanceFrontier>(); AU.addRequired<DominanceFrontier>();
AU.addRequired<DominatorTree>(); AU.addRequired<DominatorTree>();
@ -100,6 +104,7 @@ void SSI::insertSigmaFunctions(SmallVectorImpl<Instruction *> &value) {
created.insert(PN); created.insert(PN);
need = true; need = true;
defsites[i].push_back(BB_next); defsites[i].push_back(BB_next);
++NumSigmaInserted;
} }
} }
} }
@ -143,6 +148,7 @@ void SSI::insertPhiFunctions(SmallVectorImpl<Instruction *> &value) {
created.insert(PN); created.insert(PN);
defsites[i].push_back(BB_dominated); defsites[i].push_back(BB_dominated);
++NumPhiInserted;
} }
} }
} }
@ -388,3 +394,40 @@ FunctionPass *llvm::createSSIPass() { return new SSI(); }
char SSI::ID = 0; char SSI::ID = 0;
static RegisterPass<SSI> X("ssi", "Static Single Information Construction"); static RegisterPass<SSI> X("ssi", "Static Single Information Construction");
/// SSIEverything - A pass that runs createSSI on every non-void variable,
/// intended for debugging.
namespace {
struct VISIBILITY_HIDDEN SSIEverything : public FunctionPass {
static char ID; // Pass identification, replacement for typeid
SSIEverything() : FunctionPass((intptr_t)&ID) {}
bool runOnFunction(Function &F);
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<SSI>();
}
};
}
bool SSIEverything::runOnFunction(Function &F) {
SmallVector<Instruction *, 16> Insts;
SSI &ssi = getAnalysis<SSI>();
if (F.isDeclaration() || F.isIntrinsic()) return false;
for (Function::iterator B = F.begin(), BE = F.end(); B != BE; ++B)
for (BasicBlock::iterator I = B->begin(), E = B->end(); I != E; ++I)
if (I->getType() != Type::VoidTy)
Insts.push_back(I);
ssi.createSSI(Insts);
return true;
}
/// createSSIEverythingPass - The public interface to this file...
///
FunctionPass *llvm::createSSIEverythingPass() { return new SSIEverything(); }
char SSIEverything::ID = 0;
static RegisterPass<SSIEverything>
Y("ssi-everything", "Static Single Information Construction");