If available, pass down the Fixup object to EvaluateAsRelocatable.
At least on PowerPC, the interpretation of certain modifiers depends on
the context they appear in.

llvm-svn: 215310
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsMCExpr.h b/llvm/lib/Target/Mips/MCTargetDesc/MipsMCExpr.h
index f193dc9..afd1ce4 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsMCExpr.h
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsMCExpr.h
@@ -48,7 +48,8 @@
 
   void PrintImpl(raw_ostream &OS) const override;
   bool EvaluateAsRelocatableImpl(MCValue &Res,
-                                 const MCAsmLayout *Layout) const override;
+                                 const MCAsmLayout *Layout,
+                                 const MCFixup *Fixup) const override;
   void visitUsedExpr(MCStreamer &Streamer) const override;
   const MCSection *FindAssociatedSection() const override {
     return getSubExpr()->FindAssociatedSection();