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f3ff561c6f
This is phase-1 of switching from llvm::Optional to std::optional in the
next rebranch. llvm::Optional was removed from upstream LLVM, so we need
to migrate off rather soon. On Darwin, std::optional, and llvm::Optional
have the same layout, so we don't need to be as concerned about ABI
beyond the name mangling. `llvm::Optional` is only returned from one
function in
```
getStandardTypeSubst(StringRef TypeName,
bool allowConcurrencyManglings);
```
It's the return value, so it should not impact the mangling of the
function, and the layout is the same as `std::optional`, so it should be
mostly okay. This function doesn't appear to have users, and the ABI was
already broken 2 years ago for concurrency and no one seemed to notice
so this should be "okay".
I'm doing the migration incrementally so that folks working on main can
cherry-pick back to the release/5.9 branch. Once 5.9 is done and locked
away, then we can go through and finish the replacement. Since `None`
and `Optional` show up in contexts where they are not `llvm::None` and
`llvm::Optional`, I'm preparing the work now by going through and
removing the namespace unwrapping and making the `llvm` namespace
explicit. This should make it fairly mechanical to go through and
replace llvm::Optional with std::optional, and llvm::None with
std::nullopt. It's also a change that can be brought onto the
release/5.9 with minimal impact. This should be an NFC change.
62 lines
2.2 KiB
C++
62 lines
2.2 KiB
C++
//===--- GenFunc.h - Swift IR generation for functions ----------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides the private interface to the function and
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// function-type emission code.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_IRGEN_GENFUNC_H
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#define SWIFT_IRGEN_GENFUNC_H
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#include "swift/AST/Types.h"
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namespace llvm {
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class Function;
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class Value;
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}
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namespace swift {
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namespace irgen {
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class Address;
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class Explosion;
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class ForeignFunctionInfo;
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class IRGenFunction;
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/// Project the capture address from on-stack block storage.
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Address projectBlockStorageCapture(IRGenFunction &IGF,
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Address storageAddr,
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CanSILBlockStorageType storageTy);
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/// Emit the block header into a block storage slot.
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void emitBlockHeader(IRGenFunction &IGF,
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Address storage,
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CanSILBlockStorageType blockTy,
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llvm::Constant *invokeFunction,
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CanSILFunctionType invokeTy,
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ForeignFunctionInfo foreignInfo);
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/// Emit a partial application thunk for a function pointer applied to a
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/// partial set of argument values.
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llvm::Optional<StackAddress> emitFunctionPartialApplication(
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IRGenFunction &IGF, SILFunction &SILFn, const FunctionPointer &fnPtr,
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llvm::Value *fnContext, Explosion &args,
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ArrayRef<SILParameterInfo> argTypes, SubstitutionMap subs,
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CanSILFunctionType origType, CanSILFunctionType substType,
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CanSILFunctionType outType, Explosion &out, bool isOutlined);
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CanType getArgumentLoweringType(CanType type, SILParameterInfo paramInfo,
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bool isNoEscape);
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} // end namespace irgen
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} // end namespace swift
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#endif
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