// each instruction counts as 10.
for (Function::const_iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
for (BasicBlock::const_iterator II = BB->begin(), E = BB->end();
- II != E; ++II)
- if (!isa<DbgInfoIntrinsic>(II))
- ++NumInsts;
+ II != E; ++II) {
+ if (isa<DbgInfoIntrinsic>(II)) continue; // Debug intrinsics don't count.
+
+ // Noop casts don't count.
+ if (const CastInst *CI = dyn_cast<CastInst>(II)) {
+ const Type *OpTy = CI->getOperand(0)->getType();
+ if (CI->getType()->isLosslesslyConvertibleTo(OpTy))
+ continue;
+ if ((isa<PointerType>(CI->getType()) && OpTy->isInteger()) ||
+ (isa<PointerType>(OpTy) && CI->getType()->isInteger()))
+ continue; // ptr <-> int is *probably* noop cast.
+ } else if (const GetElementPtrInst *GEPI =
+ dyn_cast<GetElementPtrInst>(II)) {
+ // If a GEP has all constant indices, it will probably be folded with
+ // a load/store.
+ bool AllConstant = true;
+ for (unsigned i = 1, e = GEPI->getNumOperands(); i != e; ++i)
+ if (!isa<ConstantInt>(GEPI->getOperand(i))) {
+ AllConstant = false;
+ break;
+ }
+ if (AllConstant) continue;
+ }
+
+ ++NumInsts;
+ }
++NumBlocks;
}