adalava: change default powerpc64 ABI to ELFv2 on FreeBSD >= 13.0

Author: adalava

clang/lib/Basic/Targets/PPC.h

@@ -370,10 +370,12 @@ class LLVM_LIBRARY_VISIBILITY PPC64TargetInfo : public PPCTargetInfo {
       ABI = "elfv1";
     }
 
-    switch (getTriple().getOS()) {
+    switch (Triple.getOS()) {
     case llvm::Triple::FreeBSD:
       LongDoubleWidth = LongDoubleAlign = 64;
       LongDoubleFormat = &llvm::APFloat::IEEEdouble();
+      if (Triple.getOSMajorVersion() >= 13)
+        ABI = "elfv2";
       break;
     default:
       break;

llvm/lib/Target/PowerPC/PPCTargetMachine.cpp

@@ -195,6 +195,20 @@ static PPCTargetMachine::PPCABI computeTargetABI(const Triple &TT,
   if (TT.isMacOSX())
     return PPCTargetMachine::PPC_ABI_UNKNOWN;
 
+  if (TT.isOSFreeBSD()) {
+    switch (TT.getArch()) {
+    case Triple::ppc64le:
+    case Triple::ppc64:
+      if (TT.getOSMajorVersion() >= 13)
+        return PPCTargetMachine::PPC_ABI_ELFv2;
+      else
+        return PPCTargetMachine::PPC_ABI_ELFv1;
+    case Triple::ppc:
+    default:
+      return PPCTargetMachine::PPC_ABI_UNKNOWN;
+    }
+  }
+
   switch (TT.getArch()) {
   case Triple::ppc64le:
     return PPCTargetMachine::PPC_ABI_ELFv2;