Add AArch64 big endian Target (aarch64_be)

llvm-svn: 202151

1 files changed, 49 insertions, 6 deletions

diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index 15982cf36f6..8d2b54180b8 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -3353,6 +3353,7 @@ public:
 
 namespace {
 class AArch64TargetInfo : public TargetInfo {
+  virtual void setDescriptionString() = 0;
   static const char * const GCCRegNames[];
   static const TargetInfo::GCCRegAlias GCCRegAliases[];
 
@@ -3370,12 +3371,10 @@ public:
     IntMaxType = SignedLong;
     UIntMaxType = UnsignedLong;
     Int64Type = SignedLong;
-    BigEndian = false;
     LongWidth = LongAlign = 64;
     LongDoubleWidth = LongDoubleAlign = 128;
     PointerWidth = PointerAlign = 64;
     SuitableAlign = 128;
-    DescriptionString = "e-m:e-i64:64-i128:128-n32:64-S128";
 
     WCharType = UnsignedInt;
     if (getTriple().getOS() == llvm::Triple::NetBSD)
@@ -3394,7 +3393,6 @@ public:
                                 MacroBuilder &Builder) const {
     // GCC defines theses currently
     Builder.defineMacro("__aarch64__");
-    Builder.defineMacro("__AARCH64EL__");
 
     // ACLE predefines. Many can only have one possible value on v8 AArch64.
     Builder.defineMacro("__ARM_ACLE",         "200");
@@ -3477,6 +3475,9 @@ public:
       if (Features[i] == "+crypto")
         Crypto = 1;
     }
+
+    setDescriptionString();
+
     return true;
   }
 
@@ -3599,6 +3600,38 @@ const Builtin::Info AArch64TargetInfo::BuiltinInfo[] = {
 #include "clang/Basic/BuiltinsAArch64.def"
 };
 
+class AArch64leTargetInfo : public AArch64TargetInfo {
+  virtual void setDescriptionString() {
+    DescriptionString = "e-m:e-i64:64-i128:128-n32:64-S128";
+  }
+
+public:
+  AArch64leTargetInfo(const llvm::Triple &Triple)
+    : AArch64TargetInfo(Triple) {
+    BigEndian = false;
+    }
+  virtual void getTargetDefines(const LangOptions &Opts,
+                                MacroBuilder &Builder) const {
+    Builder.defineMacro("__AARCH64EL__");
+    AArch64TargetInfo::getTargetDefines(Opts, Builder);
+  }
+};
+
+class AArch64beTargetInfo : public AArch64TargetInfo {
+  virtual void setDescriptionString() {
+    DescriptionString = "E-m:e-i64:64-i128:128-n32:64-S128";
+  }
+
+public:
+  AArch64beTargetInfo(const llvm::Triple &Triple)
+    : AArch64TargetInfo(Triple) { }
+  virtual void getTargetDefines(const LangOptions &Opts,
+                                MacroBuilder &Builder) const {
+    Builder.defineMacro("__AARCH64EB__");
+    AArch64TargetInfo::getTargetDefines(Opts, Builder);
+  }
+};
+
 } // end anonymous namespace
 
 namespace {
@@ -5594,11 +5627,21 @@ static TargetInfo *AllocateTarget(const llvm::Triple &Triple) {
   case llvm::Triple::aarch64:
     switch (os) {
     case llvm::Triple::Linux:
-      return new LinuxTargetInfo<AArch64TargetInfo>(Triple);
+      return new LinuxTargetInfo<AArch64leTargetInfo>(Triple);
+    case llvm::Triple::NetBSD:
+      return new NetBSDTargetInfo<AArch64leTargetInfo>(Triple);
+    default:
+      return new AArch64leTargetInfo(Triple);
+    }
+
+  case llvm::Triple::aarch64_be:
+    switch (os) {
+    case llvm::Triple::Linux:
+      return new LinuxTargetInfo<AArch64beTargetInfo>(Triple);
     case llvm::Triple::NetBSD:
-      return new NetBSDTargetInfo<AArch64TargetInfo>(Triple);
+      return new NetBSDTargetInfo<AArch64beTargetInfo>(Triple);
     default:
-      return new AArch64TargetInfo(Triple);
+      return new AArch64beTargetInfo(Triple);
     }
 
   case llvm::Triple::arm: