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code restructuring, not functionality change.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50203 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-04-24 00:21:50 +00:00
parent 7cb22ecf22
commit eb5f4092d9
1 changed files with 22 additions and 20 deletions
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18
lib/Transforms/Scalar/SCCP.cpp
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@ -1693,11 +1693,15 @@ 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())) {
if (Inst->getType() == Type::VoidTy ||
isa<StructType>(Inst->getType()) ||
isa<TerminatorInst>(Inst))
continue;
LatticeVal &IV = Values[Inst];
if (IV.isConstant() ||
(IV.isUndefined() && !isa<TerminatorInst>(Inst))) {
if (!IV.isConstant() && !IV.isUndefined())
continue;
Constant *Const = IV.isConstant()
? IV.getConstant() : UndefValue::get(Inst->getType());
DOUT << " Constant: " << *Const << " = " << *Inst;
@ -1707,16 +1711,14 @@ bool IPSCCP::runOnModule(Module &M) {
Inst->replaceAllUsesWith(Const);
// Delete the instruction.
if (!isa<TerminatorInst>(Inst) && !isa<CallInst>(Inst))
BB->getInstList().erase(Inst);
if (!isa<CallInst>(Inst))
Inst->eraseFromParent();
// Hey, we just changed something!
MadeChanges = true;
++IPNumInstRemoved;
}
}
}
}
// Now that all instructions in the function are constant folded, erase dead
// blocks, because we can now use ConstantFoldTerminator to get rid of