Simplify the handling of pcrel relocations on ELF. Now we do the right thing

for all symbol differences and can drop the old EmitPCRelSymbolValue
method.

This also make getExprForFDESymbol on ELF equal to the one on MachO, and it
can be made non-virtual.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130634 91177308-0d34-0410-b5e6-96231b3b80d8

lib/MC/MCAsmStreamer.cpp

@@ -162,7 +162,7 @@ public:
   virtual void EmitBytes(StringRef Data, unsigned AddrSpace);
 
   virtual void EmitValueImpl(const MCExpr *Value, unsigned Size,
-                             bool isPCRel, unsigned AddrSpace);
+                             unsigned AddrSpace);
   virtual void EmitIntValue(uint64_t Value, unsigned Size,
                             unsigned AddrSpace = 0);
 
@@ -566,9 +566,8 @@ void MCAsmStreamer::EmitIntValue(uint64_t Value, unsigned Size,
 }
 
 void MCAsmStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
-                                  bool isPCRel, unsigned AddrSpace) {
+                                  unsigned AddrSpace) {
   assert(getCurrentSection() && "Cannot emit contents before setting section!");
-  assert(!isPCRel && "Cannot emit pc relative relocations!");
   const char *Directive = 0;
   switch (Size) {
   default: break;