本文整理汇总了C++中IRGenFunction::emitAllocRawCall方法的典型用法代码示例。如果您正苦于以下问题：C++ IRGenFunction::emitAllocRawCall方法的具体用法？C++ IRGenFunction::emitAllocRawCall怎么用？C++ IRGenFunction::emitAllocRawCall使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类IRGenFunction的用法示例。
在下文中一共展示了IRGenFunction::emitAllocRawCall方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: emitBuiltinCall
//.........这里部分代码省略.........
// The load must be post-dominated by the builtin. Otherwise we would get
// a wrong assumption in the else-branch in this example:
// x = f()
// if condition {
// y = assumeNonNegative(x)
// } else {
// // x might be negative here!
// }
// For simplicity we just enforce that both the load and the builtin must
// be in the same block.
llvm::Instruction *I = static_cast<llvm::Instruction *>(v);
if (I->getParent() == IGF.Builder.GetInsertBlock()) {
llvm::LLVMContext &ctx = IGF.IGM.Module.getContext();
auto *intType = dyn_cast<llvm::IntegerType>(v->getType());
llvm::Metadata *rangeElems[] = {
llvm::ConstantAsMetadata::get(llvm::ConstantInt::get(intType, 0)),
llvm::ConstantAsMetadata::get(
llvm::ConstantInt::get(intType,
APInt::getSignedMaxValue(intType->getBitWidth())))
};
llvm::MDNode *range = llvm::MDNode::get(ctx, rangeElems);
I->setMetadata(llvm::LLVMContext::MD_range, range);
}
}
// Don't generate any code for the builtin.
return out.add(v);
}
if (Builtin.ID == BuiltinValueKind::AllocRaw) {
auto size = args.claimNext();
auto align = args.claimNext();
// Translate the alignment to a mask.
auto alignMask = IGF.Builder.CreateSub(align, IGF.IGM.getSize(Size(1)));
auto alloc = IGF.emitAllocRawCall(size, alignMask, "builtin-allocRaw");
out.add(alloc);
return;
}
if (Builtin.ID == BuiltinValueKind::DeallocRaw) {
auto pointer = args.claimNext();
auto size = args.claimNext();
auto align = args.claimNext();
// Translate the alignment to a mask.
auto alignMask = IGF.Builder.CreateSub(align, IGF.IGM.getSize(Size(1)));
IGF.emitDeallocRawCall(pointer, size, alignMask);
return;
}
if (Builtin.ID == BuiltinValueKind::Fence) {
SmallVector<Type, 4> Types;
StringRef BuiltinName =
getBuiltinBaseName(IGF.IGM.Context, FnId.str(), Types);
BuiltinName = BuiltinName.drop_front(strlen("fence_"));
// Decode the ordering argument, which is required.
auto underscore = BuiltinName.find('_');
auto ordering = decodeLLVMAtomicOrdering(BuiltinName.substr(0, underscore));
assert(ordering != llvm::AtomicOrdering::NotAtomic);
BuiltinName = BuiltinName.substr(underscore);
// Accept singlethread if present.
bool isSingleThread = BuiltinName.startswith("_singlethread");
if (isSingleThread)
BuiltinName = BuiltinName.drop_front(strlen("_singlethread"));
assert(BuiltinName.empty() && "Mismatch with sema");
IGF.Builder.CreateFence(ordering, isSingleThread