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code restructuring, not functionality change. 

llvm-svn: 50203
This commit is contained in:
Chris Lattner 2008-04-24 00:21:50 +00:00
parent 12f1e007f7
commit 97951ac580
1 changed files with 22 additions and 20 deletions
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42
llvm/lib/Transforms/Scalar/SCCP.cpp
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@ -1693,28 +1693,30 @@ bool IPSCCP::runOnModule(Module &M) {
} else {
for (BasicBlock::iterator BI = BB->begin(), E = BB->end(); BI != E; ) {
Instruction *Inst = BI++;
if (Inst->getType() != Type::VoidTy &&
!isa<StructType>(Inst->getType())) {
LatticeVal &IV = Values[Inst];
if (IV.isConstant() ||
(IV.isUndefined() && !isa<TerminatorInst>(Inst))) {
Constant *Const = IV.isConstant()
? IV.getConstant() : UndefValue::get(Inst->getType());
DOUT << " Constant: " << *Const << " = " << *Inst;
if (Inst->getType() == Type::VoidTy ||
isa<StructType>(Inst->getType()) ||
isa<TerminatorInst>(Inst))
continue;
LatticeVal &IV = Values[Inst];
if (!IV.isConstant() && !IV.isUndefined())
continue;
Constant *Const = IV.isConstant()
? IV.getConstant() : UndefValue::get(Inst->getType());
DOUT << " Constant: " << *Const << " = " << *Inst;
// Replaces all of the uses of a variable with uses of the
// constant.
Inst->replaceAllUsesWith(Const);
// Replaces all of the uses of a variable with uses of the
// constant.
Inst->replaceAllUsesWith(Const);
// Delete the instruction.
if (!isa<CallInst>(Inst))
Inst->eraseFromParent();
// Delete the instruction.
if (!isa<TerminatorInst>(Inst) && !isa<CallInst>(Inst))
BB->getInstList().erase(Inst);
// Hey, we just changed something!
MadeChanges = true;
++IPNumInstRemoved;
}
}
// Hey, we just changed something!
MadeChanges = true;
++IPNumInstRemoved;
}
}