Move target-specific logic out of generic MCAssembler.

Whether a fixup needs relaxation for the associated instruction is a
target-specific function, as the FIXME indicated. Create a hook for that
and use it.

llvm-svn: 145881

1 files changed, 2 insertions, 5 deletions

diff --git a/llvm/lib/MC/MCAssembler.cpp b/llvm/lib/MC/MCAssembler.cpp
index 2de6d04f8ba..c5bf6b9f875 100644
--- a/llvm/lib/MC/MCAssembler.cpp
+++ b/llvm/lib/MC/MCAssembler.cpp
@@ -646,7 +646,7 @@ void MCAssembler::Finish() {
 }
 
 bool MCAssembler::fixupNeedsRelaxation(const MCFixup &Fixup,
-                                       const MCFragment *DF,
+                                       const MCInstFragment *DF,
                                        const MCAsmLayout &Layout) const {
   if (getRelaxAll())
     return true;
@@ -657,10 +657,7 @@ bool MCAssembler::fixupNeedsRelaxation(const MCFixup &Fixup,
   if (!evaluateFixup(Layout, Fixup, DF, Target, Value))
     return true;
 
-  // Otherwise, relax if the value is too big for a (signed) i8.
-  //
-  // FIXME: This is target dependent!
-  return int64_t(Value) != int64_t(int8_t(Value));
+  return getBackend().fixupNeedsRelaxation(Fixup, Value, DF, Layout);
 }
 
 bool MCAssembler::fragmentNeedsRelaxation(const MCInstFragment *IF,