diff options
Diffstat (limited to 'lib/CodeGen/AsmPrinter/AsmPrinter.cpp')
| -rw-r--r-- | lib/CodeGen/AsmPrinter/AsmPrinter.cpp | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp index bab8aad497..09aedc4cc9 100644 --- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp +++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp @@ -868,12 +868,14 @@ void AsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc, bool Indirect) const { const TargetRegisterInfo *TRI = TM.getRegisterInfo(); int Reg = TRI->getDwarfRegNum(MLoc.getReg(), false); + bool isSubRegister = Reg < 0; + unsigned Idx = 0; for (MCSuperRegIterator SR(MLoc.getReg(), TRI); SR.isValid() && Reg < 0; ++SR) { Reg = TRI->getDwarfRegNum(*SR, false); - // FIXME: Get the bit range this register uses of the superregister - // so that we can produce a DW_OP_bit_piece + if (Reg >= 0) + Idx = TRI->getSubRegIndex(*SR, MLoc.getReg()); } // FIXME: Handle cases like a super register being encoded as @@ -910,7 +912,24 @@ void AsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc, } } - // FIXME: Produce a DW_OP_bit_piece if we used a superregister + // Emit Mask + if (isSubRegister) { + unsigned Size = TRI->getSubRegIdxSize(Idx); + unsigned Offset = TRI->getSubRegIdxOffset(Idx); + if (Offset > 0) { + OutStreamer.AddComment("DW_OP_bit_piece"); + EmitInt8(dwarf::DW_OP_bit_piece); + OutStreamer.AddComment(Twine(Size)); + EmitULEB128(Size); + OutStreamer.AddComment(Twine(Offset)); + EmitULEB128(Offset); + } else { + OutStreamer.AddComment("DW_OP_piece"); + EmitInt8(dwarf::DW_OP_piece); + OutStreamer.AddComment(Twine(Size)); + EmitULEB128(Size); + } + } } bool AsmPrinter::doFinalization(Module &M) { |