//
//===----------------------------------------------------------------------===//
-#ifndef LLVM_CODEGEN_ASMPRINTER_DWARFEXCEPTION_H
-#define LLVM_CODEGEN_ASMPRINTER_DWARFEXCEPTION_H
+#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DWARFEXCEPTION_H
+#define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFEXCEPTION_H
-#include "llvm/ADT/DenseMap.h"
+#include "EHStreamer.h"
#include "llvm/CodeGen/AsmPrinter.h"
-#include <vector>
namespace llvm {
-
-template <typename T> class SmallVectorImpl;
-struct LandingPadInfo;
-class MachineModuleInfo;
-class MachineMove;
-class MachineInstr;
class MachineFunction;
-class MCAsmInfo;
-class MCExpr;
-class MCSymbol;
-class Function;
-class AsmPrinter;
-
-//===----------------------------------------------------------------------===//
-/// DwarfException - Emits Dwarf exception handling directives.
-///
-class DwarfException {
-protected:
- /// Asm - Target of Dwarf emission.
- AsmPrinter *Asm;
-
- /// MMI - Collected machine module information.
- MachineModuleInfo *MMI;
-
- /// EmitExceptionTable - Emit landing pads and actions.
- ///
- /// The general organization of the table is complex, but the basic concepts
- /// are easy. First there is a header which describes the location and
- /// organization of the three components that follow.
- /// 1. The landing pad site information describes the range of code covered
- /// by the try. In our case it's an accumulation of the ranges covered
- /// by the invokes in the try. There is also a reference to the landing
- /// pad that handles the exception once processed. Finally an index into
- /// the actions table.
- /// 2. The action table, in our case, is composed of pairs of type ids
- /// and next action offset. Starting with the action index from the
- /// landing pad site, each type Id is checked for a match to the current
- /// exception. If it matches then the exception and type id are passed
- /// on to the landing pad. Otherwise the next action is looked up. This
- /// chain is terminated with a next action of zero. If no type id is
- /// found the frame is unwound and handling continues.
- /// 3. Type id table contains references to all the C++ typeinfo for all
- /// catches in the function. This tables is reversed indexed base 1.
-
- /// SharedTypeIds - How many leading type ids two landing pads have in common.
- static unsigned SharedTypeIds(const LandingPadInfo *L,
- const LandingPadInfo *R);
-
- /// PadLT - Order landing pads lexicographically by type id.
- static bool PadLT(const LandingPadInfo *L, const LandingPadInfo *R);
-
- /// PadRange - Structure holding a try-range and the associated landing pad.
- struct PadRange {
- // The index of the landing pad.
- unsigned PadIndex;
- // The index of the begin and end labels in the landing pad's label lists.
- unsigned RangeIndex;
- };
-
- typedef DenseMap<MCSymbol *, PadRange> RangeMapType;
-
- /// ActionEntry - Structure describing an entry in the actions table.
- struct ActionEntry {
- int ValueForTypeID; // The value to write - may not be equal to the type id.
- int NextAction;
- unsigned Previous;
- };
-
- /// CallSiteEntry - Structure describing an entry in the call-site table.
- struct CallSiteEntry {
- // The 'try-range' is BeginLabel .. EndLabel.
- MCSymbol *BeginLabel; // zero indicates the start of the function.
- MCSymbol *EndLabel; // zero indicates the end of the function.
-
- // The landing pad starts at PadLabel.
- MCSymbol *PadLabel; // zero indicates that there is no landing pad.
- unsigned Action;
- };
-
- /// ComputeActionsTable - Compute the actions table and gather the first
- /// action index for each landing pad site.
- unsigned ComputeActionsTable(const SmallVectorImpl<const LandingPadInfo*>&LPs,
- SmallVectorImpl<ActionEntry> &Actions,
- SmallVectorImpl<unsigned> &FirstActions);
-
- /// CallToNoUnwindFunction - Return `true' if this is a call to a function
- /// marked `nounwind'. Return `false' otherwise.
- bool CallToNoUnwindFunction(const MachineInstr *MI);
-
- /// ComputeCallSiteTable - Compute the call-site table. The entry for an
- /// invoke has a try-range containing the call, a non-zero landing pad and an
- /// appropriate action. The entry for an ordinary call has a try-range
- /// containing the call and zero for the landing pad and the action. Calls
- /// marked 'nounwind' have no entry and must not be contained in the try-range
- /// of any entry - they form gaps in the table. Entries must be ordered by
- /// try-range address.
- void ComputeCallSiteTable(SmallVectorImpl<CallSiteEntry> &CallSites,
- const RangeMapType &PadMap,
- const SmallVectorImpl<const LandingPadInfo *> &LPs,
- const SmallVectorImpl<unsigned> &FirstActions);
- void EmitExceptionTable();
-
-public:
- //===--------------------------------------------------------------------===//
- // Main entry points.
- //
- DwarfException(AsmPrinter *A);
- virtual ~DwarfException();
+class ARMTargetStreamer;
- /// EndModule - Emit all exception information that should come after the
- /// content.
- virtual void EndModule();
-
- /// BeginFunction - Gather pre-function exception information. Assumes being
- /// emitted immediately after the function entry point.
- virtual void BeginFunction(const MachineFunction *MF);
-
- /// EndFunction - Gather and emit post-function exception information.
- virtual void EndFunction();
-};
-
-class DwarfCFIException : public DwarfException {
+class DwarfCFIException : public EHStreamer {
/// shouldEmitPersonality - Per-function flag to indicate if .cfi_personality
/// should be emitted.
bool shouldEmitPersonality;
DwarfCFIException(AsmPrinter *A);
virtual ~DwarfCFIException();
- /// EndModule - Emit all exception information that should come after the
+ /// endModule - Emit all exception information that should come after the
/// content.
- virtual void EndModule();
+ void endModule() override;
- /// BeginFunction - Gather pre-function exception information. Assumes being
+ /// beginFunction - Gather pre-function exception information. Assumes being
/// emitted immediately after the function entry point.
- virtual void BeginFunction(const MachineFunction *MF);
+ void beginFunction(const MachineFunction *MF) override;
- /// EndFunction - Gather and emit post-function exception information.
- virtual void EndFunction();
+ /// endFunction - Gather and emit post-function exception information.
+ void endFunction(const MachineFunction *) override;
};
-class DwarfSjLjException : public DwarfException {
-public:
- //===--------------------------------------------------------------------===//
- // Main entry points.
- //
- DwarfSjLjException(AsmPrinter *A);
- virtual ~DwarfSjLjException();
-
- /// EndModule - Emit all exception information that should come after the
- /// content.
- virtual void EndModule();
-
- /// BeginFunction - Gather pre-function exception information. Assumes being
- /// emitted immediately after the function entry point.
- virtual void BeginFunction(const MachineFunction *MF);
+class ARMException : public EHStreamer {
+ void emitTypeInfos(unsigned TTypeEncoding) override;
+ ARMTargetStreamer &getTargetStreamer();
- /// EndFunction - Gather and emit post-function exception information.
- virtual void EndFunction();
-};
-
-class ARMException : public DwarfException {
- /// shouldEmitTable - Per-function flag to indicate if EH tables should
- /// be emitted.
- bool shouldEmitTable;
-
- /// shouldEmitMoves - Per-function flag to indicate if frame moves info
+ /// shouldEmitCFI - Per-function flag to indicate if frame CFI info
/// should be emitted.
- bool shouldEmitMoves;
+ bool shouldEmitCFI;
- /// shouldEmitTableModule - Per-module flag to indicate if EH tables
- /// should be emitted.
- bool shouldEmitTableModule;
public:
//===--------------------------------------------------------------------===//
// Main entry points.
ARMException(AsmPrinter *A);
virtual ~ARMException();
- /// EndModule - Emit all exception information that should come after the
+ /// endModule - Emit all exception information that should come after the
/// content.
- virtual void EndModule();
+ void endModule() override;
- /// BeginFunction - Gather pre-function exception information. Assumes being
+ /// beginFunction - Gather pre-function exception information. Assumes being
/// emitted immediately after the function entry point.
- virtual void BeginFunction(const MachineFunction *MF);
+ void beginFunction(const MachineFunction *MF) override;
- /// EndFunction - Gather and emit post-function exception information.
- virtual void EndFunction();
+ /// endFunction - Gather and emit post-function exception information.
+ void endFunction(const MachineFunction *) override;
};
-
} // End of namespace llvm
#endif
projects / oota-llvm.git / blobdiff