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Fix bug with ADD nodes and malloc promotion

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1144 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2001-11-05 21:13:30 +00:00
parent 93ee0a165a
commit c109d30239
1 changed files with 29 additions and 9 deletions
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38
lib/Transforms/LevelRaise.cpp
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@ -251,10 +251,6 @@ static bool PeepholeMallocInst(BasicBlock *BB, BasicBlock::iterator &BI) {
// Loop over all of the uses of the malloc instruction, inspecting casts.
for (Value::use_iterator I = MI->use_begin(), E = MI->use_end();
I != E; ++I) {
if (!isa<CastInst>(*I) && !isa<BinaryOperator>(*I)) {
//cerr << "\tnon" << *I;
return false; // A non cast user?
}
if (CastInst *CI = dyn_cast<CastInst>(*I)) {
//cerr << "\t" << CI;
@ -283,11 +279,35 @@ static bool PeepholeMallocInst(BasicBlock *BB, BasicBlock::iterator &BI) {
// that is of the same size as the malloc instruction.
if (!ResultTy) return false;
PRINT_PEEPHOLE1("mall-refine:in ", MI);
ReplaceInstWithInst(BB->getInstList(), BI,
MI = new MallocInst(PointerType::get(ResultTy)));
PRINT_PEEPHOLE1("mall-refine:out", MI);
return true;
// Now we check to see if we can convert the return value of malloc to the
// specified pointer type. All this is moot if we can't.
//
ValueTypeCache ConvertedTypes;
if (RetValConvertableToType(MI, PointerType::get(ResultTy), ConvertedTypes)) {
// Yup, it's convertable, do the transformation now!
PRINT_PEEPHOLE1("mall-refine:in ", MI);
// Create a new malloc instruction, and insert it into the method...
MallocInst *NewMI = new MallocInst(PointerType::get(ResultTy));
NewMI->setName(MI->getName());
MI->setName("");
BI = BB->getInstList().insert(BI, NewMI)+1;
// Create a new cast instruction to cast it to the old type...
CastInst *NewCI = new CastInst(NewMI, MI->getType());
BB->getInstList().insert(BI, NewCI);
// Move all users of the old malloc instruction over to use the new cast...
MI->replaceAllUsesWith(NewCI);
ValueMapCache ValueMap;
ConvertUsersType(NewCI, NewMI, ValueMap); // This will delete MI!
BI = BB->begin(); // Rescan basic block. BI might be invalidated.
PRINT_PEEPHOLE1("mall-refine:out", NewMI);
return true;
}
return false;
}