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Use a ptr set instead of a linear search to unique TokenFactor operands.

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This fixes PR1423

llvm-svn: 37102
This commit is contained in:
Chris Lattner 2007-05-16 06:37:59 +00:00
parent 7db5630b2b
commit a18b36cf45
1 changed files with 13 additions and 10 deletions
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23
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -29,17 +29,18 @@
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "dagcombine"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
#include <algorithm>
using namespace llvm;
@ -713,10 +714,10 @@ SDOperand DAGCombiner::visitTokenFactor(SDNode *N) {
return N->getOperand(1);
}
SmallVector<SDNode *, 8> TFs; // List of token factors to visit.
SmallVector<SDOperand, 8> Ops; // Ops for replacing token factor.
bool Changed = false; // If we should replace this token factor.
SmallVector<SDNode *, 8> TFs; // List of token factors to visit.
SmallVector<SDOperand, 8> Ops; // Ops for replacing token factor.
SmallPtrSet<SDNode*, 16> SeenOps;
bool Changed = false; // If we should replace this token factor.
// Start out with this token factor.
TFs.push_back(N);
@ -750,9 +751,11 @@ SDOperand DAGCombiner::visitTokenFactor(SDNode *N) {
// Fall thru
default:
// Only add if not there prior.
if (std::find(Ops.begin(), Ops.end(), Op) == Ops.end())
// Only add if it isn't already in the list.
if (SeenOps.insert(Op.Val))
Ops.push_back(Op);
else
Changed = true;
break;
}
}