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add some -stats output.

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llvm-svn: 122682
This commit is contained in:
Chris Lattner 2011-01-02 07:36:44 +00:00
parent 2afc3c0dc4
commit bbd22e0c3c
1 changed files with 10 additions and 1 deletions
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11
lib/Transforms/Scalar/LoopIdiomRecognize.cpp
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@ -25,10 +25,13 @@
#include "llvm/Support/Debug.h"
#include "llvm/Support/IRBuilder.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/Statistic.h"
using namespace llvm;
// TODO: Recognize "N" size array multiplies: replace with call to blas or
// something.
STATISTIC(NumMemSet, "Number of memset's formed from loop stores");
STATISTIC(NumMemCpy, "Number of memcpy's formed from loop load+stores");
namespace {
class LoopIdiomRecognize : public LoopPass {
@ -123,6 +126,10 @@ static void DeleteDeadInstruction(Instruction *I, ScalarEvolution &SE) {
bool LoopIdiomRecognize::runOnLoop(Loop *L, LPPassManager &LPM) {
CurLoop = L;
if (L->getHeader()->getName().startswith("bb29")) {
errs() << *L->getHeader();
}
// We only look at trivial single basic block loops.
// TODO: eventually support more complex loops, scanning the header.
if (L->getBlocks().size() != 1)
@ -210,7 +217,7 @@ bool LoopIdiomRecognize::processLoopStore(StoreInst *SI, const SCEV *BECount) {
if (processLoopStoreOfLoopLoad(SI, StoreSize, StoreEv, LoadEv, BECount))
return true;
}
// errs() << "UNHANDLED strided store: " << *Ev << " - " << *SI << "\n";
//errs() << "UNHANDLED strided store: " << *StoreEv << " - " << *SI << "\n";
return false;
}
@ -309,6 +316,7 @@ processLoopStoreOfSplatValue(StoreInst *SI, unsigned StoreSize,
// Okay, the memset has been formed. Zap the original store and anything that
// feeds into it.
DeleteDeadInstruction(SI, *SE);
++NumMemSet;
return true;
}
@ -379,5 +387,6 @@ processLoopStoreOfLoopLoad(StoreInst *SI, unsigned StoreSize,
// Okay, the memset has been formed. Zap the original store and anything that
// feeds into it.
DeleteDeadInstruction(SI, *SE);
++NumMemCpy;
return true;
}