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- Fix bug: LevelRaise/2002-10-08-VarArgCall.ll

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4083 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-10-08 22:19:25 +00:00
parent 8576bd6220
commit 61b92c02b4
1 changed files with 39 additions and 1 deletions
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40
lib/Transforms/LevelRaise.cpp
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@ -45,6 +45,9 @@ NumCastOfCast("raise", "Number of cast-of-self removed");
static Statistic<>
NumDCEorCP("raise", "Number of insts DCEd or constprop'd");
static Statistic<>
NumVarargCallChanges("raise", "Number of vararg call peepholes");
#define PRINT_PEEPHOLE(ID, NUM, I) \
DEBUG(std::cerr << "Inst P/H " << ID << "[" << NUM << "] " << I)
@ -253,7 +256,8 @@ static bool PeepholeOptimize(BasicBlock *BB, BasicBlock::iterator &BI) {
// source type of the cast...
//
ConvertedTypes.clear();
ConvertedTypes[Src] = Src->getType(); // Make sure the source doesn't change type
// Make sure the source doesn't change type
ConvertedTypes[Src] = Src->getType();
if (ValueConvertableToType(CI, Src->getType(), ConvertedTypes)) {
PRINT_PEEPHOLE3("CAST-DEST-EXPR-CONV:in ", Src, CI, BB->getParent());
@ -454,6 +458,40 @@ static bool PeepholeOptimize(BasicBlock *BB, BasicBlock::iterator &BI) {
++NumGEPInstFormed;
return true;
}
} else if (CallInst *CI = dyn_cast<CallInst>(I)) {
// If we have a call with all varargs arguments, convert the call to use the
// actual argument types present...
//
const PointerType *PTy = cast<PointerType>(CI->getCalledValue()->getType());
const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
// Is the call to a vararg variable with no real parameters?
if (FTy->isVarArg() && FTy->getNumParams() == 0) {
// If so, insert a new cast instruction, casting it to a function type
// that matches the current arguments...
//
std::vector<const Type *> Params; // Parameter types...
for (unsigned i = 1, e = CI->getNumOperands(); i != e; ++i)
Params.push_back(CI->getOperand(i)->getType());
FunctionType *NewFT = FunctionType::get(FTy->getReturnType(),
Params, false);
PointerType *NewPFunTy = PointerType::get(NewFT);
// Create a new cast, inserting it right before the function call...
CastInst *NewCast = new CastInst(CI->getCalledValue(), NewPFunTy,
CI->getCalledValue()->getName(), CI);
// Create a new call instruction...
CallInst *NewCall = new CallInst(NewCast,
std::vector<Value*>(CI->op_begin()+1, CI->op_end()));
++BI;
ReplaceInstWithInst(CI, NewCall);
++NumVarargCallChanges;
return true;
}
}
return false;