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9abf7d608e
If a class has hidden visibility all derived classes and all classes that have it as a member must have hidden visibility too. That may be fixable here but requires changes to quite a lot of debug info classes. This is also one of the things that GCC enforces aggressively while clang ignores it, making testing more annoying than necessary. llvm-svn: 260529
106 lines
3.4 KiB
C++
106 lines
3.4 KiB
C++
//===-- llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.h --------*- C++ -*--===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Common functionality for different debug information format backends.
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// LLVM currently supports DWARF and CodeView.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DEBUGHANDLERBASE_H
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#define LLVM_LIB_CODEGEN_ASMPRINTER_DEBUGHANDLERBASE_H
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#include "AsmPrinterHandler.h"
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#include "DbgValueHistoryCalculator.h"
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#include "llvm/CodeGen/LexicalScopes.h"
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namespace llvm {
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class AsmPrinter;
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class MachineModuleInfo;
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/// Base class for debug information backends. Common functionality related to
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/// tracking which variables and scopes are alive at a given PC live here.
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class DebugHandlerBase : public AsmPrinterHandler {
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protected:
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DebugHandlerBase(AsmPrinter *A);
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/// Target of debug info emission.
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AsmPrinter *Asm;
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/// Collected machine module information.
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MachineModuleInfo *MMI;
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/// Previous instruction's location information. This is used to
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/// determine label location to indicate scope boundries in dwarf
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/// debug info.
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DebugLoc PrevInstLoc;
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MCSymbol *PrevLabel = nullptr;
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/// This location indicates end of function prologue and beginning of
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/// function body.
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DebugLoc PrologEndLoc;
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/// If nonnull, stores the current machine instruction we're processing.
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const MachineInstr *CurMI = nullptr;
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LexicalScopes LScopes;
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/// History of DBG_VALUE and clobber instructions for each user
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/// variable. Variables are listed in order of appearance.
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DbgValueHistoryMap DbgValues;
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/// Maps instruction with label emitted before instruction.
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/// FIXME: Make this private from DwarfDebug, we have the necessary accessors
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/// for it.
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DenseMap<const MachineInstr *, MCSymbol *> LabelsBeforeInsn;
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/// Maps instruction with label emitted after instruction.
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DenseMap<const MachineInstr *, MCSymbol *> LabelsAfterInsn;
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/// Indentify instructions that are marking the beginning of or
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/// ending of a scope.
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void identifyScopeMarkers();
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/// Ensure that a label will be emitted before MI.
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void requestLabelBeforeInsn(const MachineInstr *MI) {
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LabelsBeforeInsn.insert(std::make_pair(MI, nullptr));
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}
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/// Ensure that a label will be emitted after MI.
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void requestLabelAfterInsn(const MachineInstr *MI) {
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LabelsAfterInsn.insert(std::make_pair(MI, nullptr));
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}
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// AsmPrinterHandler overrides.
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public:
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void beginInstruction(const MachineInstr *MI) override;
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void endInstruction() override;
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void beginFunction(const MachineFunction *MF) override;
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void endFunction(const MachineFunction *MF) override;
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/// Return Label preceding the instruction.
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MCSymbol *getLabelBeforeInsn(const MachineInstr *MI);
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/// Return Label immediately following the instruction.
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MCSymbol *getLabelAfterInsn(const MachineInstr *MI);
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/// Determine the relative position of the pieces described by P1 and P2.
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/// Returns -1 if P1 is entirely before P2, 0 if P1 and P2 overlap,
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/// 1 if P1 is entirely after P2.
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static int pieceCmp(const DIExpression *P1, const DIExpression *P2);
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/// Determine whether two variable pieces overlap.
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static bool piecesOverlap(const DIExpression *P1, const DIExpression *P2);
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};
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}
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#endif
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