X86 JIT PIC jumptable support.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45616 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/MachineCodeEmitter.h

@@ -58,6 +58,7 @@ protected:
   /// all code emission requests will be ignored (this is the buffer overflow
   /// condition).
   unsigned char *CurBufferPtr;
+
 public:
   virtual ~MachineCodeEmitter() {}
 

include/llvm/Target/TargetJITInfo.h

@@ -55,6 +55,13 @@ namespace llvm {
       return 0;
     }
 
+    /// getPICJumpTableEntry - Returns the value of the jumptable entry for the
+    /// specific basic block.
+    virtual intptr_t getPICJumpTableEntry(intptr_t BB, intptr_t JTBase) {
+      assert(0 && "This target doesn't implement getPICJumpTableEntry!");
+      return 0;
+    }
+
     /// LazyResolverFn - This typedef is used to represent the function that
     /// unresolved call points should invoke.  This is a target specific
     /// function that knows how to walk the stack and find out which stub the