diff options
Diffstat (limited to 'lib/CodeGen/AsmPrinter/DwarfUnit.cpp')
-rw-r--r-- | lib/CodeGen/AsmPrinter/DwarfUnit.cpp | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/lib/CodeGen/AsmPrinter/DwarfUnit.cpp b/lib/CodeGen/AsmPrinter/DwarfUnit.cpp index a1db1e0a2e..6c9e40b066 100644 --- a/lib/CodeGen/AsmPrinter/DwarfUnit.cpp +++ b/lib/CodeGen/AsmPrinter/DwarfUnit.cpp @@ -24,6 +24,7 @@ #include "llvm/IR/Instructions.h" #include "llvm/IR/Mangler.h" #include "llvm/MC/MCAsmInfo.h" +#include "llvm/MC/MCContext.h" #include "llvm/MC/MCSection.h" #include "llvm/MC/MCStreamer.h" #include "llvm/Support/CommandLine.h" @@ -476,13 +477,45 @@ void DwarfUnit::addVariableAddress(const DbgVariable &DV, DIE *Die, /// addRegisterOp - Add register operand. void DwarfUnit::addRegisterOp(DIEBlock *TheDie, unsigned Reg) { const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo(); - unsigned DWReg = RI->getDwarfRegNum(Reg, false); + int DWReg = RI->getDwarfRegNum(Reg, false); + bool isSubRegister = DWReg < 0; + + unsigned Idx = 0; + + // Go up the super-register chain until we hit a valid dwarf register number. + for (MCSuperRegIterator SR(Reg, RI); SR.isValid() && DWReg < 0; ++SR) { + DWReg = RI->getDwarfRegNum(*SR, false); + if (DWReg >= 0) + Idx = RI->getSubRegIndex(*SR, Reg); + } + + if (DWReg < 0) { + DEBUG(llvm::dbgs() << "Invalid Dwarf register number.\n"); + addUInt(TheDie, dwarf::DW_FORM_data1, dwarf::DW_OP_nop); + return; + } + + // Emit register if (DWReg < 32) addUInt(TheDie, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + DWReg); else { addUInt(TheDie, dwarf::DW_FORM_data1, dwarf::DW_OP_regx); addUInt(TheDie, dwarf::DW_FORM_udata, DWReg); } + + // Emit Mask + if (isSubRegister) { + unsigned Size = RI->getSubRegIdxSize(Idx); + unsigned Offset = RI->getSubRegIdxOffset(Idx); + if (Offset > 0) { + addUInt(TheDie, dwarf::DW_FORM_data1, dwarf::DW_OP_bit_piece); + addUInt(TheDie, dwarf::DW_FORM_data1, Size); + addUInt(TheDie, dwarf::DW_FORM_data1, Offset); + } else { + addUInt(TheDie, dwarf::DW_FORM_data1, dwarf::DW_OP_piece); + addUInt(TheDie, dwarf::DW_FORM_data1, Size); + } + } } /// addRegisterOffset - Add register offset. |