[Nios2] Remove Nios2 backend

As mentioned here http://lists.llvm.org/pipermail/llvm-dev/2019-January/129121.html This backend is incomplete and has not been maintained in several months.

Differential Revision: https://reviews.llvm.org/D56691

llvm-svn: 351231

Author: topperc

llvm/include/llvm/ADT/Triple.h

@@ -60,7 +60,6 @@ class Triple {
     mips64,         // MIPS64: mips64, mips64r6, mipsn32, mipsn32r6
     mips64el,       // MIPS64EL: mips64el, mips64r6el, mipsn32el, mipsn32r6el
     msp430,         // MSP430: msp430
-    nios2,          // NIOSII: nios2
     ppc,            // PPC: powerpc
     ppc64,          // PPC64: powerpc64, ppu
     ppc64le,        // PPC64LE: powerpc64le

llvm/lib/Support/Triple.cpp

@@ -35,7 +35,6 @@ StringRef Triple::getArchTypeName(ArchType Kind) {
   case mips64:         return "mips64";
   case mips64el:       return "mips64el";
   case msp430:         return "msp430";
-  case nios2:          return "nios2";
   case ppc64:          return "powerpc64";
   case ppc64le:        return "powerpc64le";
   case ppc:            return "powerpc";
@@ -102,8 +101,6 @@ StringRef Triple::getArchTypePrefix(ArchType Kind) {
   case mips64:
   case mips64el:    return "mips";
 
-  case nios2:       return "nios2";
-
   case hexagon:     return "hexagon";
 
   case amdgcn:      return "amdgcn";
@@ -274,7 +271,6 @@ Triple::ArchType Triple::getArchTypeForLLVMName(StringRef Name) {
     .Case("mips64", mips64)
     .Case("mips64el", mips64el)
     .Case("msp430", msp430)
-    .Case("nios2", nios2)
     .Case("ppc64", ppc64)
     .Case("ppc32", ppc)
     .Case("ppc", ppc)
@@ -409,7 +405,6 @@ static Triple::ArchType parseArch(StringRef ArchName) {
            "mips64r6", "mipsn32r6", Triple::mips64)
     .Cases("mips64el", "mipsn32el", "mipsisa64r6el", "mips64r6el",
            "mipsn32r6el", Triple::mips64el)
-    .Case("nios2", Triple::nios2)
     .Case("r600", Triple::r600)
     .Case("amdgcn", Triple::amdgcn)
     .Case("riscv32", Triple::riscv32)
@@ -667,7 +662,6 @@ static Triple::ObjectFormatType getDefaultFormat(const Triple &T) {
   case Triple::mips64el:
   case Triple::mipsel:
   case Triple::msp430:
-  case Triple::nios2:
   case Triple::nvptx:
   case Triple::nvptx64:
   case Triple::ppc64le:
@@ -1225,7 +1219,6 @@ static unsigned getArchPointerBitWidth(llvm::Triple::ArchType Arch) {
   case llvm::Triple::le32:
   case llvm::Triple::mips:
   case llvm::Triple::mipsel:
-  case llvm::Triple::nios2:
   case llvm::Triple::nvptx:
   case llvm::Triple::ppc:
   case llvm::Triple::r600:
@@ -1310,7 +1303,6 @@ Triple Triple::get32BitArchVariant() const {
   case Triple::le32:
   case Triple::mips:
   case Triple::mipsel:
-  case Triple::nios2:
   case Triple::nvptx:
   case Triple::ppc:
   case Triple::r600:
@@ -1359,7 +1351,6 @@ Triple Triple::get64BitArchVariant() const {
   case Triple::kalimba:
   case Triple::lanai:
   case Triple::msp430:
-  case Triple::nios2:
   case Triple::r600:
   case Triple::tce:
   case Triple::tcele:
@@ -1431,7 +1422,6 @@ Triple Triple::getBigEndianArchVariant() const {
   case Triple::le32:
   case Triple::le64:
   case Triple::msp430:
-  case Triple::nios2:
   case Triple::nvptx64:
   case Triple::nvptx:
   case Triple::r600:
@@ -1518,7 +1508,6 @@ bool Triple::isLittleEndian() const {
   case Triple::mips64el:
   case Triple::mipsel:
   case Triple::msp430:
-  case Triple::nios2:
   case Triple::nvptx64:
   case Triple::nvptx:
   case Triple::ppc64le:

llvm/lib/Target/LLVMBuild.txt

@@ -30,7 +30,6 @@ subdirectories =
  MSP430
  NVPTX
  Mips
- Nios2
  PowerPC
  RISCV
  Sparc