[Windows] Define generic arguments registers for Windows x64

Summary:
When evaluating expressions the generic arguments registers are required by ABI.
This patch defines them.

Reviewers: zturner, stella.stamenova, labath

Subscribers: aleksandr.urakov, lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D53753

llvm-svn: 345385

lldb/source/Plugins/Process/Windows/Common/x64/RegisterContextWindows_x64.cpp

@@ -74,12 +74,12 @@ RegisterInfo g_register_infos[] = {
      nullptr,
      nullptr},
     {DEFINE_GPR(rcx, nullptr),
-     {dwarf_rcx_x86_64, dwarf_rcx_x86_64, LLDB_INVALID_REGNUM,
+     {dwarf_rcx_x86_64, dwarf_rcx_x86_64, LLDB_REGNUM_GENERIC_ARG1,
       LLDB_INVALID_REGNUM, lldb_rcx_x86_64},
      nullptr,
      nullptr},
     {DEFINE_GPR(rdx, nullptr),
-     {dwarf_rdx_x86_64, dwarf_rdx_x86_64, LLDB_INVALID_REGNUM,
+     {dwarf_rdx_x86_64, dwarf_rdx_x86_64, LLDB_REGNUM_GENERIC_ARG2,
       LLDB_INVALID_REGNUM, lldb_rdx_x86_64},
      nullptr,
      nullptr},
@@ -104,22 +104,22 @@ RegisterInfo g_register_infos[] = {
      nullptr,
      nullptr},
     {DEFINE_GPR(r8, nullptr),
-     {dwarf_r8_x86_64, dwarf_r8_x86_64, LLDB_INVALID_REGNUM,
+     {dwarf_r8_x86_64, dwarf_r8_x86_64, LLDB_REGNUM_GENERIC_ARG3,
       LLDB_INVALID_REGNUM, lldb_r8_x86_64},
      nullptr,
      nullptr},
     {DEFINE_GPR(r9, nullptr),
-     {dwarf_r9_x86_64, dwarf_r9_x86_64, LLDB_INVALID_REGNUM,
+     {dwarf_r9_x86_64, dwarf_r9_x86_64, LLDB_REGNUM_GENERIC_ARG4,
       LLDB_INVALID_REGNUM, lldb_r9_x86_64},
      nullptr,
      nullptr},
     {DEFINE_GPR(r10, nullptr),
-     {dwarf_r10_x86_64, dwarf_r10_x86_64, LLDB_INVALID_REGNUM,
+     {dwarf_r10_x86_64, dwarf_r10_x86_64, LLDB_REGNUM_GENERIC_ARG5,
       LLDB_INVALID_REGNUM, lldb_r10_x86_64},
      nullptr,
      nullptr},
     {DEFINE_GPR(r11, nullptr),
-     {dwarf_r11_x86_64, dwarf_r11_x86_64, LLDB_INVALID_REGNUM,
+     {dwarf_r11_x86_64, dwarf_r11_x86_64, LLDB_REGNUM_GENERIC_ARG6,
       LLDB_INVALID_REGNUM, lldb_r11_x86_64},
      nullptr,
      nullptr},