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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145881 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 10 insertions, 1 deletions

diff --git a/include/llvm/MC/MCAsmBackend.h b/include/llvm/MC/MCAsmBackend.h
index 4a0cf37..b841ddb 100644
--- a/include/llvm/MC/MCAsmBackend.h
+++ b/include/llvm/MC/MCAsmBackend.h
@@ -16,9 +16,11 @@
 #include "llvm/Support/DataTypes.h"
 
 namespace llvm {
+class MCAsmLayout;
 class MCELFObjectTargetWriter;
 class MCFixup;
 class MCInst;
+class MCInstFragment;
 class MCObjectWriter;
 class MCSection;
 template<typename T>
@@ -104,6 +106,13 @@ public:
   /// \param Inst - The instruction to test.
   virtual bool MayNeedRelaxation(const MCInst &Inst) const = 0;
 
+  /// fixupNeedsRelaxation - Target specific predicate for whether a given
+  /// fixup requires the associated instruction to be relaxed.
+  virtual bool fixupNeedsRelaxation(const MCFixup &Fixup,
+                                    uint64_t Value,
+                                    const MCInstFragment *DF,
+                                    const MCAsmLayout &Layout) const = 0;
+
   /// RelaxInstruction - Relax the instruction in the given fragment to the next
   /// wider instruction.
   ///
diff --git a/include/llvm/MC/MCAssembler.h b/include/llvm/MC/MCAssembler.h
index 7d84092..687dd0c 100644
--- a/include/llvm/MC/MCAssembler.h
+++ b/include/llvm/MC/MCAssembler.h
@@ -717,7 +717,7 @@ private:
 
   /// Check whether a fixup can be satisfied, or whether it needs to be relaxed
   /// (increased in size, in order to hold its value correctly).
-  bool fixupNeedsRelaxation(const MCFixup &Fixup, const MCFragment *DF,
+  bool fixupNeedsRelaxation(const MCFixup &Fixup, const MCInstFragment *DF,
                             const MCAsmLayout &Layout) const;
 
   /// Check whether the given fragment needs relaxation.