[lldb] [DynamicRegisterInfo] Pass name/alt_name via RegisterInfo

Remove the name and alt_name parameters from AddRegister() and instead
pass them via RegisterInfo.name and .alt_name fields.  This makes
the API simpler and removes some duplication.

Differential Revision: https://reviews.llvm.org/D109872

Author: mgorny

lldb/source/Plugins/Process/Utility/DynamicRegisterInfo.cpp

@@ -396,14 +396,10 @@ DynamicRegisterInfo::SetRegisterInfo(const StructuredData::Dictionary &dict,
 }
 
 void DynamicRegisterInfo::AddRegister(RegisterInfo &reg_info,
-                                      ConstString &reg_name,
-                                      ConstString &reg_alt_name,
                                       ConstString &set_name) {
   assert(!m_finalized);
   const uint32_t reg_num = m_regs.size();
-  reg_info.name = reg_name.AsCString();
   assert(reg_info.name);
-  reg_info.alt_name = reg_alt_name.AsCString(nullptr);
   uint32_t i;
   if (reg_info.value_regs) {
     for (i = 0; reg_info.value_regs[i] != LLDB_INVALID_REGNUM; ++i)

lldb/source/Plugins/Process/Utility/DynamicRegisterInfo.h

@@ -36,8 +36,6 @@ class DynamicRegisterInfo {
                          const lldb_private::ArchSpec &arch);
 
   void AddRegister(lldb_private::RegisterInfo &reg_info,
-                   lldb_private::ConstString &reg_name,
-                   lldb_private::ConstString &reg_alt_name,
                    lldb_private::ConstString &set_name);
 
   void Finalize(const lldb_private::ArchSpec &arch);

lldb/source/Plugins/Process/gdb-remote/GDBRemoteRegisterContext.cpp

@@ -992,19 +992,12 @@ void GDBRemoteDynamicRegisterInfo::HardcodeARMRegisters(bool from_scratch) {
       }
     }
     for (i = 0; i < num_registers; ++i) {
-      ConstString name;
-      ConstString alt_name;
-      if (g_register_infos[i].name && g_register_infos[i].name[0])
-        name.SetCString(g_register_infos[i].name);
-      if (g_register_infos[i].alt_name && g_register_infos[i].alt_name[0])
-        alt_name.SetCString(g_register_infos[i].alt_name);
-
       if (i <= 15 || i == 25)
-        AddRegister(g_register_infos[i], name, alt_name, gpr_reg_set);
+        AddRegister(g_register_infos[i], gpr_reg_set);
       else if (i <= 24)
-        AddRegister(g_register_infos[i], name, alt_name, sfp_reg_set);
+        AddRegister(g_register_infos[i], sfp_reg_set);
       else
-        AddRegister(g_register_infos[i], name, alt_name, vfp_reg_set);
+        AddRegister(g_register_infos[i], vfp_reg_set);
     }
   } else {
     // Add composite registers to our primordial registers, then.
@@ -1040,8 +1033,6 @@ void GDBRemoteDynamicRegisterInfo::HardcodeARMRegisters(bool from_scratch) {
     // If "match" is true, then we can add extra registers.
     if (match) {
       for (i = 0; i < num_composites; ++i) {
-        ConstString name;
-        ConstString alt_name;
         const uint32_t first_primordial_reg =
             g_comp_register_infos[i].value_regs[0];
         const char *reg_name = g_register_infos[first_primordial_reg].name;
@@ -1054,9 +1045,7 @@ void GDBRemoteDynamicRegisterInfo::HardcodeARMRegisters(bool from_scratch) {
               // The name matches the existing primordial entry. Find and
               // assign the offset, and then add this composite register entry.
               g_comp_register_infos[i].byte_offset = reg_info->byte_offset;
-              name.SetCString(g_comp_register_infos[i].name);
-              AddRegister(g_comp_register_infos[i], name, alt_name,
-                          vfp_reg_set);
+              AddRegister(g_comp_register_infos[i], vfp_reg_set);
             }
           }
         }

lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp

@@ -578,13 +578,14 @@ void ProcessGDBRemote::BuildDynamicRegisterInfo(bool force) {
         }
 
         reg_info.name = reg_name.AsCString();
+        reg_info.alt_name = alt_name.AsCString();
         // We have to make a temporary ABI here, and not use the GetABI because
         // this code gets called in DidAttach, when the target architecture
         // (and consequently the ABI we'll get from the process) may be wrong.
         if (ABISP abi_sp = ABI::FindPlugin(shared_from_this(), arch_to_use))
           abi_sp->AugmentRegisterInfo(reg_info);
 
-        m_register_info_sp->AddRegister(reg_info, reg_name, alt_name, set_name);
+        m_register_info_sp->AddRegister(reg_info, set_name);
       } else {
         break; // ensure exit before reg_num is incremented
       }
@@ -4554,9 +4555,10 @@ bool ParseRegisters(XMLNode feature_node, GdbServerTargetInfo &target_info,
         reg_num_remote = reg_info.kinds[eRegisterKindProcessPlugin] + 1;
         ++reg_num_local;
         reg_info.name = reg_name.AsCString();
+        reg_info.alt_name = alt_name.AsCString();
         if (abi_sp)
           abi_sp->AugmentRegisterInfo(reg_info);
-        dyn_reg_info.AddRegister(reg_info, reg_name, alt_name, set_name);
+        dyn_reg_info.AddRegister(reg_info, set_name);
 
         return true; // Keep iterating through all "reg" elements
       });