diff options
Diffstat (limited to 'llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp index 31877d9..8161de5 100644 --- a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp +++ b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp @@ -26,7 +26,6 @@ #include "llvm/CodeGen/MachineInstr.h" #include "llvm/CodeGen/MachineModuleInfo.h" #include "llvm/CodeGen/TargetFrameLowering.h" -#include "llvm/CodeGen/TargetLowering.h" #include "llvm/CodeGen/TargetRegisterInfo.h" #include "llvm/CodeGen/TargetSubtargetInfo.h" #include "llvm/Config/llvm-config.h" @@ -1244,8 +1243,6 @@ void CodeViewDebug::emitDebugInfoForFunction(const Function *GV, if (SP != nullptr) emitDebugInfoForUDTs(LocalUDTs); - emitDebugInfoForJumpTables(FI); - // We're done with this function. emitEndSymbolRecord(SymbolKind::S_PROC_ID_END); } @@ -1581,11 +1578,6 @@ void CodeViewDebug::beginFunctionImpl(const MachineFunction *MF) { } } } - - // Mark branches that may potentially be using jump tables with labels. - bool isThumb = Triple(MMI->getModule()->getTargetTriple()).getArch() == - llvm::Triple::ArchType::thumb; - discoverJumpTableBranches(MF, isThumb); } static bool shouldEmitUdt(const DIType *T) { @@ -3091,10 +3083,6 @@ void CodeViewDebug::endFunctionImpl(const MachineFunction *MF) { } } - bool isThumb = Triple(MMI->getModule()->getTargetTriple()).getArch() == - llvm::Triple::ArchType::thumb; - collectDebugInfoForJumpTables(MF, isThumb); - CurFn->Annotations = MF->getCodeViewAnnotations(); CurFn->End = Asm->getFunctionEnd(); @@ -3454,125 +3442,3 @@ void CodeViewDebug::emitDebugInfoForGlobal(const CVGlobalVariable &CVGV) { emitConstantSymbolRecord(DIGV->getType(), Value, QualifiedName); } } - -void forEachJumpTableBranch( - const MachineFunction *MF, bool isThumb, - const std::function<void(const MachineJumpTableInfo &, const MachineInstr &, - int64_t)> &Callback) { - auto JTI = MF->getJumpTableInfo(); - if (JTI && !JTI->isEmpty()) { - for (const auto &MBB : *MF) { - // Search for indirect branches... - const auto LastMI = MBB.getFirstTerminator(); - if (LastMI != MBB.end() && LastMI->isIndirectBranch()) { - bool foundJTI = false; - if (isThumb) { - // ... that directly use jump table operands. - // NOTE: ARM uses pattern matching to lower its BR_JT SDNode to - // machine instructions, hence inserting a JUMP_TABLE_DEBUG_INFO node - // interferes with this process *but* the resulting pseudo-instruction - // uses a Jump Table operand, so extract the jump table index directly - // from that. - for (const auto &MO : LastMI->operands()) { - if (MO.isJTI()) { - foundJTI = true; - Callback(*JTI, *LastMI, MO.getIndex()); - break; - } - } - } else { - // ... that have jump table debug info. - // NOTE: The debug info is inserted as a JUMP_TABLE_DEBUG_INFO node - // when lowering the BR_JT SDNode to an indirect branch. - for (auto I = MBB.instr_rbegin(), E = MBB.instr_rend(); I != E; ++I) { - if (I->isJumpTableDebugInfo()) { - foundJTI = true; - Callback(*JTI, *LastMI, I->getOperand(0).getImm()); - break; - } - } - } - assert(foundJTI); - (void)foundJTI; - } - } - } -} - -void CodeViewDebug::discoverJumpTableBranches(const MachineFunction *MF, - bool isThumb) { - forEachJumpTableBranch( - MF, isThumb, - [this](const MachineJumpTableInfo &, const MachineInstr &BranchMI, - int64_t) { requestLabelBeforeInsn(&BranchMI); }); -} - -void CodeViewDebug::collectDebugInfoForJumpTables(const MachineFunction *MF, - bool isThumb) { - forEachJumpTableBranch( - MF, isThumb, - [this, MF](const MachineJumpTableInfo &JTI, const MachineInstr &BranchMI, - int64_t JumpTableIndex) { - // For label-difference jump tables, find the base expression. - // Otherwise the jump table uses an absolute address (so no base - // is required). - const MCSymbol *Base; - uint64_t BaseOffset = 0; - const MCSymbol *Branch = getLabelBeforeInsn(&BranchMI); - JumpTableEntrySize EntrySize; - switch (JTI.getEntryKind()) { - case MachineJumpTableInfo::EK_Custom32: - case MachineJumpTableInfo::EK_GPRel32BlockAddress: - case MachineJumpTableInfo::EK_GPRel64BlockAddress: - llvm_unreachable( - "EK_Custom32, EK_GPRel32BlockAddress, and " - "EK_GPRel64BlockAddress should never be emitted for COFF"); - case MachineJumpTableInfo::EK_BlockAddress: - // Each entry is an absolute address. - EntrySize = JumpTableEntrySize::Pointer; - Base = nullptr; - break; - case MachineJumpTableInfo::EK_Inline: - case MachineJumpTableInfo::EK_LabelDifference32: - // Ask the AsmPrinter. - std::tie(Base, BaseOffset, Branch, EntrySize) = - Asm->getCodeViewJumpTableInfo(JumpTableIndex, &BranchMI, Branch); - break; - } - - CurFn->JumpTables.push_back( - {EntrySize, Base, BaseOffset, Branch, - MF->getJTISymbol(JumpTableIndex, MMI->getContext()), - JTI.getJumpTables()[JumpTableIndex].MBBs.size()}); - }); -} - -void CodeViewDebug::emitDebugInfoForJumpTables(const FunctionInfo &FI) { - for (auto JumpTable : FI.JumpTables) { - MCSymbol *JumpTableEnd = beginSymbolRecord(SymbolKind::S_ARMSWITCHTABLE); - if (JumpTable.Base) { - OS.AddComment("Base offset"); - OS.emitCOFFSecRel32(JumpTable.Base, JumpTable.BaseOffset); - OS.AddComment("Base section index"); - OS.emitCOFFSectionIndex(JumpTable.Base); - } else { - OS.AddComment("Base offset"); - OS.emitInt32(0); - OS.AddComment("Base section index"); - OS.emitInt16(0); - } - OS.AddComment("Switch type"); - OS.emitInt16(static_cast<uint16_t>(JumpTable.EntrySize)); - OS.AddComment("Branch offset"); - OS.emitCOFFSecRel32(JumpTable.Branch, /*Offset=*/0); - OS.AddComment("Table offset"); - OS.emitCOFFSecRel32(JumpTable.Table, /*Offset=*/0); - OS.AddComment("Branch section index"); - OS.emitCOFFSectionIndex(JumpTable.Branch); - OS.AddComment("Table section index"); - OS.emitCOFFSectionIndex(JumpTable.Table); - OS.AddComment("Entries count"); - OS.emitInt32(JumpTable.TableSize); - endSymbolRecord(JumpTableEnd); - } -} |