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2dbd6cc56b
Introduce two modes of bridging: * inline mode: this is basically how it worked so far. Using full C++ interop which allows bridging functions to be inlined. * pure mode: bridging functions are not inlined but compiled in a cpp file. This allows to reduce the C++ interop requirements to a minimum. No std/llvm/swift headers are imported. This change requires a major refactoring of bridging sources. The implementation of bridging functions go to two separate files: SILBridgingImpl.h and OptimizerBridgingImpl.h. Depending on the mode, those files are either included in the corresponding header files (inline mode), or included in the c++ file (pure mode). The mode can be selected with the BRIDGING_MODE cmake variable. By default it is set to the inline mode (= existing behavior). The pure mode is only selected in certain configurations to work around C++ interop issues: * In debug builds, to workaround a problem with LLDB's `po` command (rdar://115770255). * On windows to workaround a build problem.
37 lines
1.2 KiB
Swift
37 lines
1.2 KiB
Swift
//===--- SimplifyCondBranch.swift -----------------------------------------===//
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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 - 2023 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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import SIL
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extension CondBranchInst : OnoneSimplifyable {
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func simplify(_ context: SimplifyContext) {
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tryConstantFold(context)
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}
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}
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private extension CondBranchInst {
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func tryConstantFold(_ context: SimplifyContext) {
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guard let literal = condition as? IntegerLiteralInst,
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let conditionValue = literal.value else
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{
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return
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}
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let builder = Builder(before: self, context)
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if conditionValue == 0 {
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builder.createBranch(to: falseBlock, arguments: Array(falseOperands.map { $0.value }))
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} else {
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builder.createBranch(to: trueBlock, arguments: Array(trueOperands.map { $0.value }))
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}
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context.erase(instruction: self)
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}
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}
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