Displaying 3 results from an estimated 3 matches for "getinstructioniterator".
2010 Nov 24
2
[LLVMdev] how to eliminate dead infinite loops?
...of like what I'm looking for. The only problem is that
ADCE is treating all terminator instructions as live:
// Collect the set of "root" instructions that are known live.
for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I)
if (isa<TerminatorInst>(I.getInstructionIterator()) ||
isa<DbgInfoIntrinsic>(I.getInstructionIterator()) ||
I->mayHaveSideEffects()) {
alive.insert(I.getInstructionIterator());
worklist.push_back(I.getInstructionIterator());
}
Is this correct? I would have thought that branch instructions should
no...
2010 Nov 24
0
[LLVMdev] how to eliminate dead infinite loops?
Andrew Clinton wrote:
> Most of my programs contain loops that the LoopDeletion pass is unable
> to remove. It appears that the following code in LoopDeletion.cpp:152
> is the culprit:
>
> ScalarEvolution& SE = getAnalysis<ScalarEvolution>();
> const SCEV *S = SE.getMaxBackedgeTakenCount(L);
> if (isa<SCEVCouldNotCompute>(S))
> return
2010 Nov 23
5
[LLVMdev] how to eliminate dead infinite loops?
Most of my programs contain loops that the LoopDeletion pass is unable
to remove. It appears that the following code in LoopDeletion.cpp:152
is the culprit:
ScalarEvolution& SE = getAnalysis<ScalarEvolution>();
const SCEV *S = SE.getMaxBackedgeTakenCount(L);
if (isa<SCEVCouldNotCompute>(S))
return Changed;
So, LoopDeletion thinks my loops might be infinite so it