diff options
Diffstat (limited to 'llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp index 4cd7cc969b1..d8a7ac3b44e 100644 --- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp +++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp @@ -763,7 +763,22 @@ getDebugValueLocation(const MachineInstr *MI) const { /// EmitDwarfRegOp - Emit dwarf register operation. void AsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc) const { const TargetRegisterInfo *TRI = TM.getRegisterInfo(); - unsigned Reg = TRI->getDwarfRegNum(MLoc.getReg(), false); + int Reg = TRI->getDwarfRegNum(MLoc.getReg(), false); + + for (const unsigned *SR = TRI->getSuperRegisters(MLoc.getReg()); + *SR && Reg == -1; ++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 + } + + // FIXME: Handle cases like a super register being encoded as + // DW_OP_reg 32 DW_OP_piece 4 DW_OP_reg 33 + + // FIXME: We have no reasonable way of handling errors in here. The + // caller might be in the middle of an dwarf expression. We should + // probably assert that Reg >= 0 once debug info generation is more mature. + if (int Offset = MLoc.getOffset()) { if (Reg < 32) { OutStreamer.AddComment( @@ -788,6 +803,8 @@ void AsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc) const { EmitULEB128(Reg); } } + + // FIXME: Produce a DW_OP_bit_piece if we used a superregister } bool AsmPrinter::doFinalization(Module &M) { |
