Remove dead code.

isAlias always returns false and no one is using it. It was
originally added Atom to query if an atom is an alias for another
atom, assuming that alias atoms are different from normal atoms.

We now support atom aliasing, but the way that's implemented is
in a different way than what isAlias assumed. An alias atom is
just a regular defined atom with no content, and it has a layout-
before edge to alias-to atom so that they are layed out at the
same location in the result. So this is dead code, and it doesn't
make much sense to keep it.

llvm-svn: 207884

1 files changed, 0 insertions, 5 deletions

diff --git a/lld/lib/ReaderWriter/CoreLinkingContext.cpp b/lld/lib/ReaderWriter/CoreLinkingContext.cpp
index 0ee4b51af92..36ec7a2ed5c 100644
--- a/lld/lib/ReaderWriter/CoreLinkingContext.cpp
+++ b/lld/lib/ReaderWriter/CoreLinkingContext.cpp
@@ -63,8 +63,6 @@ public:
     return DefinedAtom::permR_X;
   }
 
-  bool isAlias() const override { return false; }
-
   ArrayRef<uint8_t> rawContent() const override { return ArrayRef<uint8_t>(); }
 
   reference_iterator begin() const override {
@@ -128,8 +126,6 @@ public:
     return DefinedAtom::permRW_;
   }
 
-  bool isAlias() const override { return false; }
-
   ArrayRef<uint8_t> rawContent() const override { return ArrayRef<uint8_t>(); }
 
   reference_iterator begin() const override {
@@ -273,4 +269,3 @@ void CoreLinkingContext::addPasses(PassManager &pm) {
 }
 
 Writer &CoreLinkingContext::writer() const { return *_writer; }
-