Move getPlatformFlags to ELFObjectFileBase and simplify.

This removes a few std::error_code results that were ignored on every
call.

llvm-svn: 323674
diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
index 7f3f50e..36b43ec9 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
@@ -529,10 +529,11 @@
     IsMipsN64ABI = false;
     return;
   }
-  unsigned AbiVariant;
-  Obj.getPlatformFlags(AbiVariant);
-  IsMipsO32ABI = AbiVariant & ELF::EF_MIPS_ABI_O32;
-  IsMipsN32ABI = AbiVariant & ELF::EF_MIPS_ABI2;
+  if (auto *E = dyn_cast<ELFObjectFileBase>(&Obj)) {
+    unsigned AbiVariant = E->getPlatformFlags();
+    IsMipsO32ABI = AbiVariant & ELF::EF_MIPS_ABI_O32;
+    IsMipsN32ABI = AbiVariant & ELF::EF_MIPS_ABI2;
+  }
   IsMipsN64ABI = Obj.getFileFormatName().equals("ELF64-mips");
 }
 
@@ -1261,8 +1262,7 @@
         DEBUG(dbgs() << " Create a new stub function\n");
         Stubs[Value] = Section.getStubOffset();
 
-        unsigned AbiVariant;
-        O.getPlatformFlags(AbiVariant);
+        unsigned AbiVariant = Obj.getPlatformFlags();
 
         uint8_t *StubTargetAddr = createStubFunction(
             Section.getAddressWithOffset(Section.getStubOffset()), AbiVariant);
@@ -1357,8 +1357,7 @@
         DEBUG(dbgs() << " Create a new stub function\n");
         Stubs[Value] = Section.getStubOffset();
 
-        unsigned AbiVariant;
-        O.getPlatformFlags(AbiVariant);
+        unsigned AbiVariant = Obj.getPlatformFlags();
 
         uint8_t *StubTargetAddr = createStubFunction(
             Section.getAddressWithOffset(Section.getStubOffset()), AbiVariant);
@@ -1415,8 +1414,7 @@
   } else if (Arch == Triple::ppc64 || Arch == Triple::ppc64le) {
     if (RelType == ELF::R_PPC64_REL24) {
       // Determine ABI variant in use for this object.
-      unsigned AbiVariant;
-      Obj.getPlatformFlags(AbiVariant);
+      unsigned AbiVariant = Obj.getPlatformFlags();
       AbiVariant &= ELF::EF_PPC64_ABI;
       // A PPC branch relocation will need a stub function if the target is
       // an external symbol (either Value.SymbolName is set, or SymType is
diff --git a/llvm/lib/Object/ELFObjectFile.cpp b/llvm/lib/Object/ELFObjectFile.cpp
index 0aad1c8..3c1bdf5 100644
--- a/llvm/lib/Object/ELFObjectFile.cpp
+++ b/llvm/lib/Object/ELFObjectFile.cpp
@@ -76,8 +76,7 @@
 
 SubtargetFeatures ELFObjectFileBase::getMIPSFeatures() const {
   SubtargetFeatures Features;
-  unsigned PlatformFlags;
-  getPlatformFlags(PlatformFlags);
+  unsigned PlatformFlags = getPlatformFlags();
 
   switch (PlatformFlags & ELF::EF_MIPS_ARCH) {
   case ELF::EF_MIPS_ARCH_1: