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011358edd6
This removes the ambiguity when casting from a SingleValueInstruction to SILNode, which makes the code simpler. E.g. the "isRepresentativeSILNode" logic is not needed anymore. Also, it reduces the size of the most used instruction class - SingleValueInstruction - by one pointer. Conceptually, SILInstruction is still a SILNode. But implementation-wise SILNode is not a base class of SILInstruction anymore. Only the two sub-classes of SILInstruction - SingleValueInstruction and NonSingleValueInstruction - inherit from SILNode. SingleValueInstruction's SILNode is embedded into a ValueBase and its relative offset in the class is the same as in NonSingleValueInstruction (see SILNodeOffsetChecker). This makes it possible to cast from a SILInstruction to a SILNode without knowing which SILInstruction sub-class it is. Casting to SILNode cannot be done implicitly, but only with an LLVM `cast` or with SILInstruction::asSILNode(). But this is a rare case anyway.
86 lines
2.7 KiB
C++
86 lines
2.7 KiB
C++
//===--- PrettyStackTrace.h - Crash trace information -----------*- 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 defines SIL-specific RAII classes that give better diagnostic
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// output about when, exactly, a crash is occurring.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_SIL_PRETTYSTACKTRACE_H
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#define SWIFT_SIL_PRETTYSTACKTRACE_H
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#include "swift/SIL/SILLocation.h"
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#include "swift/SIL/SILNode.h"
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#include "llvm/Support/PrettyStackTrace.h"
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namespace swift {
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class ASTContext;
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class SILFunction;
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void printSILLocationDescription(llvm::raw_ostream &out, SILLocation loc,
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ASTContext &ctx);
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/// PrettyStackTraceLocation - Observe that we are doing some
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/// processing starting at a SIL location.
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class PrettyStackTraceSILLocation : public llvm::PrettyStackTraceEntry {
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SILLocation Loc;
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const char *Action;
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ASTContext &Context;
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public:
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PrettyStackTraceSILLocation(const char *action, SILLocation loc,
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ASTContext &C)
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: Loc(loc), Action(action), Context(C) {}
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virtual void print(llvm::raw_ostream &OS) const override;
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};
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/// Observe that we are doing some processing of a SIL function.
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class PrettyStackTraceSILFunction : public llvm::PrettyStackTraceEntry {
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const SILFunction *func;
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/// An inline buffer of characters used if we are passed a twine.
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SmallString<256> data;
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/// This points either at a user provided const char * string or points at the
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/// inline message buffer that is initialized with data from a twine on
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/// construction.
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StringRef action;
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public:
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PrettyStackTraceSILFunction(const char *action, const SILFunction *func)
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: func(func), data(), action(action) {}
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PrettyStackTraceSILFunction(llvm::Twine &&twine, const SILFunction *func)
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: func(func), data(), action(twine.toNullTerminatedStringRef(data)) {}
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virtual void print(llvm::raw_ostream &os) const override;
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protected:
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void printFunctionInfo(llvm::raw_ostream &out) const;
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};
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/// Observe that we are visiting SIL nodes.
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class PrettyStackTraceSILNode : public llvm::PrettyStackTraceEntry {
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const SILNode *Node;
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const char *Action;
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public:
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PrettyStackTraceSILNode(const char *action, SILNodePointer node)
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: Node(node), Action(action) {}
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virtual void print(llvm::raw_ostream &OS) const override;
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};
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} // end namespace swift
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#endif
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