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Sink DwarfDebug::updateSubprogramScopeDIE into DwarfCompileUnit

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This requires exposing some of the current function state from
DwarfDebug. I hope there's not too much of that to expose as I go
through all the functions, but it still seems nicer to expose singular
data down to multiple consumers, than have consumers expose raw mapping
data structures up to DwarfDebug for building subprograms.

Part of a series of refactoring to allow subprograms in both the
skeleton and dwo CUs under Fission.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219060 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie 2014-10-04 16:24:00 +00:00
parent dba26ca39c
commit 53b95f3fb1
4 changed files with 41 additions and 33 deletions
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30
lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
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@ -1,5 +1,6 @@
#include "DwarfCompileUnit.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/GlobalVariable.h"
@ -7,6 +8,9 @@
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetSubtargetInfo.h"
#include "llvm/Target/TargetRegisterInfo.h"
namespace llvm {
@ -289,4 +293,30 @@ void DwarfCompileUnit::attachLowHighPC(DIE &D, const MCSymbol *Begin,
addLabelDelta(D, dwarf::DW_AT_high_pc, End, Begin);
}
// Find DIE for the given subprogram and attach appropriate DW_AT_low_pc
// and DW_AT_high_pc attributes. If there are global variables in this
// scope then create and insert DIEs for these variables.
DIE &DwarfCompileUnit::updateSubprogramScopeDIE(DISubprogram SP) {
DIE *SPDie = getOrCreateSubprogramDIE(SP);
attachLowHighPC(*SPDie, DD->getFunctionBeginSym(), DD->getFunctionEndSym());
if (!DD->getCurrentFunction()->getTarget().Options.DisableFramePointerElim(
*DD->getCurrentFunction()))
addFlag(*SPDie, dwarf::DW_AT_APPLE_omit_frame_ptr);
// Only include DW_AT_frame_base in full debug info
if (getCUNode().getEmissionKind() != DIBuilder::LineTablesOnly) {
const TargetRegisterInfo *RI =
Asm->TM.getSubtargetImpl()->getRegisterInfo();
MachineLocation Location(RI->getFrameRegister(*Asm->MF));
addAddress(*SPDie, dwarf::DW_AT_frame_base, Location);
}
// Add name to the name table, we do this here because we're guaranteed
// to have concrete versions of our DW_TAG_subprogram nodes.
DD->addSubprogramNames(SP, *SPDie);
return *SPDie;
}
} // end llvm namespace

6
lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
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@ -62,6 +62,12 @@ public:
void addRange(RangeSpan Range);
void attachLowHighPC(DIE &D, const MCSymbol *Begin, const MCSymbol *End);
/// \brief Find DIE for the given subprogram and attach appropriate
/// DW_AT_low_pc and DW_AT_high_pc attributes. If there are global
/// variables in this scope then create and insert DIEs for these
/// variables.
DIE &updateSubprogramScopeDIE(DISubprogram SP);
};
} // end llvm namespace

28
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@ -311,32 +311,6 @@ bool DwarfDebug::isSubprogramContext(const MDNode *Context) {
return false;
}
// Find DIE for the given subprogram and attach appropriate DW_AT_low_pc
// and DW_AT_high_pc attributes. If there are global variables in this
// scope then create and insert DIEs for these variables.
DIE &DwarfDebug::updateSubprogramScopeDIE(DwarfCompileUnit &SPCU,
DISubprogram SP) {
DIE *SPDie = SPCU.getOrCreateSubprogramDIE(SP);
SPCU.attachLowHighPC(*SPDie, FunctionBeginSym, FunctionEndSym);
if (!CurFn->getTarget().Options.DisableFramePointerElim(*CurFn))
SPCU.addFlag(*SPDie, dwarf::DW_AT_APPLE_omit_frame_ptr);
// Only include DW_AT_frame_base in full debug info
if (SPCU.getCUNode().getEmissionKind() != DIBuilder::LineTablesOnly) {
const TargetRegisterInfo *RI =
Asm->TM.getSubtargetImpl()->getRegisterInfo();
MachineLocation Location(RI->getFrameRegister(*Asm->MF));
SPCU.addAddress(*SPDie, dwarf::DW_AT_frame_base, Location);
}
// Add name to the name table, we do this here because we're guaranteed
// to have concrete versions of our DW_TAG_subprogram nodes.
addSubprogramNames(SP, *SPDie);
return *SPDie;
}
/// Check whether we should create a DIE for the given Scope, return true
/// if we don't create a DIE (the corresponding DIE is null).
bool DwarfDebug::isLexicalScopeDIENull(LexicalScope *Scope) {
@ -545,7 +519,7 @@ void DwarfDebug::constructSubprogramScopeDIE(DwarfCompileUnit &TheCU,
ProcessedSPNodes.insert(Sub);
DIE &ScopeDIE = updateSubprogramScopeDIE(TheCU, Sub);
DIE &ScopeDIE = TheCU.updateSubprogramScopeDIE(Sub);
// Collect arguments for current function.
assert(LScopes.isCurrentFunctionScope(Scope));

10
lib/CodeGen/AsmPrinter/DwarfDebug.h
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@ -353,12 +353,6 @@ class DwarfDebug : public AsmPrinterHandler {
void ensureAbstractVariableIsCreatedIfScoped(const DIVariable &Var,
const MDNode *Scope);
/// \brief Find DIE for the given subprogram and attach appropriate
/// DW_AT_low_pc and DW_AT_high_pc attributes. If there are global
/// variables in this scope then create and insert DIEs for these
/// variables.
DIE &updateSubprogramScopeDIE(DwarfCompileUnit &SPCU, DISubprogram SP);
/// \brief A helper function to check whether the DIE for a given Scope is
/// going to be null.
bool isLexicalScopeDIENull(LexicalScope *Scope);
@ -691,6 +685,10 @@ public:
void addAccelNamespace(StringRef Name, const DIE &Die);
void addAccelType(StringRef Name, const DIE &Die, char Flags);
const MachineFunction *getCurrentFunction() const { return CurFn; }
const MCSymbol *getFunctionBeginSym() const { return FunctionBeginSym; }
const MCSymbol *getFunctionEndSym() const { return FunctionEndSym; }
};
} // End of namespace llvm