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code cleanup, no functionality change.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50201 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-04-24 00:16:28 +00:00
parent c9e495c534
commit f4023a1ef6
1 changed files with 20 additions and 18 deletions
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38
lib/Transforms/Scalar/SCCP.cpp
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@ -1516,25 +1516,27 @@ bool SCCP::runOnFunction(Function &F) {
//
for (BasicBlock::iterator BI = BB->begin(), E = BB->end(); BI != E; ) {
Instruction *Inst = BI++;
if (Inst->getType() != Type::VoidTy) {
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<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);
// Delete the instruction.
BB->getInstList().erase(Inst);
// Hey, we just changed something!
MadeChanges = true;
++NumInstRemoved;
}
}
// Replaces all of the uses of a variable with uses of the constant.
Inst->replaceAllUsesWith(Const);
// Delete the instruction.
Inst->eraseFromParent();
// Hey, we just changed something!
MadeChanges = true;
++NumInstRemoved;
}
}