Index: llvm/include/llvm/BinaryFormat/Dwarf.def =================================================================== --- llvm/include/llvm/BinaryFormat/Dwarf.def +++ llvm/include/llvm/BinaryFormat/Dwarf.def @@ -1012,6 +1012,7 @@ HANDLE_DW_CC(0xc9, LLVM_PreserveMost) HANDLE_DW_CC(0xca, LLVM_PreserveAll) HANDLE_DW_CC(0xcb, LLVM_X86RegCall) +HANDLE_DW_CC(0xcc, LLVM_M68kRTD) // From GCC source code (include/dwarf2.h): This DW_CC_ value is not currently // generated by any toolchain. It is used internally to GDB to indicate OpenCL // C functions that have been compiled with the IBM XL C for OpenCL compiler and Index: llvm/lib/DebugInfo/DWARF/DWARFTypePrinter.cpp =================================================================== --- llvm/lib/DebugInfo/DWARF/DWARFTypePrinter.cpp +++ llvm/lib/DebugInfo/DWARF/DWARFTypePrinter.cpp @@ -620,6 +620,9 @@ case CallingConvention::DW_CC_LLVM_X86RegCall: OS << " __attribute__((regcall))"; break; + case CallingConvention::DW_CC_LLVM_M68kRTD: + OS << " __attribute__((m68k_rtd))"; + break; } } Index: llvm/test/DebugInfo/M68k/calling-convention.ll =================================================================== --- /dev/null +++ llvm/test/DebugInfo/M68k/calling-convention.ll @@ -0,0 +1,21 @@ +; RUN: llc --mtriple=m68k -filetype=obj %s -o %t +; RUN: llvm-dwarfdump -v %t | FileCheck %s + +; CHECK-LABEL: DW_TAG_subprogram +; CHECK: DW_AT_calling_convention [DW_FORM_data1] (DW_CC_LLVM_M68kRTD) +define m68k_rtdcc void @foo() !dbg !3 { +entry: + ret void +} + +!llvm.dbg.cu = !{!0} +!llvm.module.flags = !{!2} + +!0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "clang version 17.0.0 (https://github.com/llvm/llvm-project.git)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None) +!1 = !DIFile(filename: "foo.c", directory: "/path/to/file") +!2 = !{i32 2, !"Debug Info Version", i32 3} +!3 = distinct !DISubprogram(name: "foo", scope: !4, file: !4, line: 4, type: !5, scopeLine: 4, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !7) +!4 = !DIFile(filename: "./foo.c", directory: "/path/to/file") +!5 = !DISubroutineType(cc: DW_CC_LLVM_M68kRTD, types: !6) +!6 = !{null} +!7 = !{}