Add XCOFF triple object format type for AIX

This patch adds an XCOFF triple object format type into LLVM.
This XCOFF triple object file type will be used later by object file and assembly generation for the AIX platform.

Differential Revision: https://reviews.llvm.org/D58930

llvm-svn: 355989

5 files changed, 21 insertions, 0 deletions

diff --git a/llvm/lib/MC/MCContext.cpp b/llvm/lib/MC/MCContext.cpp
index 69e18ed8998..49fad131a2c 100644
--- a/llvm/lib/MC/MCContext.cpp
+++ b/llvm/lib/MC/MCContext.cpp
@@ -161,6 +161,9 @@ MCSymbol *MCContext::createSymbolImpl(const StringMapEntry<bool> *Name,
       return new (Name, *this) MCSymbolMachO(Name, IsTemporary);
     case MCObjectFileInfo::IsWasm:
       return new (Name, *this) MCSymbolWasm(Name, IsTemporary);
+    case MCObjectFileInfo::IsXCOFF:
+      // TODO: Need to implement class MCSymbolXCOFF.
+      break;
     }
   }
   return new (Name, *this) MCSymbol(MCSymbol::SymbolKindUnset, Name,
diff --git a/llvm/lib/MC/MCObjectFileInfo.cpp b/llvm/lib/MC/MCObjectFileInfo.cpp
index d9f1b2cb059..1c845f64050 100644
--- a/llvm/lib/MC/MCObjectFileInfo.cpp
+++ b/llvm/lib/MC/MCObjectFileInfo.cpp
@@ -801,6 +801,11 @@ void MCObjectFileInfo::InitMCObjectFileInfo(const Triple &TheTriple, bool PIC,
     Env = IsWasm;
     initWasmMCObjectFileInfo(TT);
     break;
+  case Triple::XCOFF:
+    Env = IsXCOFF;
+    // TODO: Initialize MCObjectFileInfo for XCOFF format when
+    // MCSectionXCOFF is ready.
+    break;
   case Triple::UnknownObjectFormat:
     report_fatal_error("Cannot initialize MC for unknown object file format.");
     break;
@@ -816,6 +821,7 @@ MCSection *MCObjectFileInfo::getDwarfComdatSection(const char *Name,
   case Triple::MachO:
   case Triple::COFF:
   case Triple::Wasm:
+  case Triple::XCOFF:
   case Triple::UnknownObjectFormat:
     report_fatal_error("Cannot get DWARF comdat section for this object file "
                        "format: not implemented.");
diff --git a/llvm/lib/MC/MCParser/AsmParser.cpp b/llvm/lib/MC/MCParser/AsmParser.cpp
index 4b487825935..a153ee184e3 100644
--- a/llvm/lib/MC/MCParser/AsmParser.cpp
+++ b/llvm/lib/MC/MCParser/AsmParser.cpp
@@ -710,6 +710,9 @@ AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
   case MCObjectFileInfo::IsWasm:
     PlatformParser.reset(createWasmAsmParser());
     break;
+  case MCObjectFileInfo::IsXCOFF:
+    // TODO: Need to implement createXCOFFAsmParser for XCOFF format.
+    break;
   }
 
   PlatformParser->Initialize(*this);
diff --git a/llvm/lib/Support/Triple.cpp b/llvm/lib/Support/Triple.cpp
index ab9fcccd5c4..83ce4f0f122 100644
--- a/llvm/lib/Support/Triple.cpp
+++ b/llvm/lib/Support/Triple.cpp
@@ -534,6 +534,9 @@ static Triple::EnvironmentType parseEnvironment(StringRef EnvironmentName) {
 
 static Triple::ObjectFormatType parseFormat(StringRef EnvironmentName) {
   return StringSwitch<Triple::ObjectFormatType>(EnvironmentName)
+    // "xcoff" must come before "coff" because of the order-dependendent
+    // pattern matching.
+    .EndsWith("xcoff", Triple::XCOFF)
     .EndsWith("coff", Triple::COFF)
     .EndsWith("elf", Triple::ELF)
     .EndsWith("macho", Triple::MachO)
@@ -622,6 +625,7 @@ static StringRef getObjectFormatTypeName(Triple::ObjectFormatType Kind) {
   case Triple::ELF: return "elf";
   case Triple::MachO: return "macho";
   case Triple::Wasm: return "wasm";
+  case Triple::XCOFF: return "xcoff";
   }
   llvm_unreachable("unknown object format type");
 }
@@ -686,6 +690,8 @@ static Triple::ObjectFormatType getDefaultFormat(const Triple &T) {
   case Triple::ppc64:
     if (T.isOSDarwin())
       return Triple::MachO;
+    else if (T.isOSAIX())
+      return Triple::XCOFF;
     return Triple::ELF;
 
   case Triple::wasm32:
diff --git a/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index 76a0665239d..c3779233870 100644
--- a/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -5594,6 +5594,9 @@ bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
   case MCObjectFileInfo::IsWasm:
     CurrentFormat = WASM;
     break;
+  case MCObjectFileInfo::IsXCOFF:
+    llvm_unreachable("unexpected object format");
+    break;
   }
 
   if (~Prefix->SupportedFormats & CurrentFormat) {