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CloneModule stores the BasicBlock mapping in ValueMap. There's no need to

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recompute it. This fixes a O(n^2) in number of blocks when reducing a crash.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68422 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2009-04-04 09:39:23 +00:00
parent 5a30f4f84a
commit e032590f58
1 changed files with 6 additions and 17 deletions
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23
tools/bugpoint/CrashDebugger.cpp
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@ -21,6 +21,7 @@
#include "llvm/Pass.h"
#include "llvm/PassManager.h"
#include "llvm/ValueSymbolTable.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/Analysis/Verifier.h"
#include "llvm/Support/CFG.h"
#include "llvm/Transforms/Scalar.h"
@ -267,21 +268,9 @@ bool ReduceCrashingBlocks::TestBlocks(std::vector<const BasicBlock*> &BBs) {
Module *M = CloneModule(BD.getProgram(), ValueMap);
// Convert list to set for fast lookup...
std::set<BasicBlock*> Blocks;
for (unsigned i = 0, e = BBs.size(); i != e; ++i) {
// Convert the basic block from the original module to the new module...
const Function *F = BBs[i]->getParent();
Function *CMF = cast<Function>(ValueMap[F]);
assert(CMF && "Function not in module?!");
assert(CMF->getFunctionType() == F->getFunctionType() && "wrong type?");
assert(CMF->getName() == F->getName() && "wrong name?");
// Get the mapped basic block...
Function::iterator CBI = CMF->begin();
std::advance(CBI, std::distance(F->begin(),
Function::const_iterator(BBs[i])));
Blocks.insert(CBI);
}
SmallPtrSet<BasicBlock*, 8> Blocks;
for (unsigned i = 0, e = BBs.size(); i != e; ++i)
Blocks.insert(cast<BasicBlock>(ValueMap[BBs[i]]));
std::cout << "Checking for crash with only these blocks:";
unsigned NumPrint = Blocks.size();
@ -320,8 +309,8 @@ bool ReduceCrashingBlocks::TestBlocks(std::vector<const BasicBlock*> &BBs) {
// have to take.
std::vector<std::pair<Function*, std::string> > BlockInfo;
for (std::set<BasicBlock*>::iterator I = Blocks.begin(), E = Blocks.end();
I != E; ++I)
for (SmallPtrSet<BasicBlock*, 8>::iterator I = Blocks.begin(),
E = Blocks.end(); I != E; ++I)
BlockInfo.push_back(std::make_pair((*I)->getParent(), (*I)->getName()));
// Now run the CFG simplify pass on the function...