Updated the llvm-mc disassembler C API to support for the X86 target.

rdar://10873652

As part of this I updated the llvm-mc disassembler C API to always call the
SymbolLookUp call back even if there is no getOpInfo call back.  If there is a
getOpInfo call back that is tried first and then if that gets no information
then the  SymbolLookUp is called.  I also made the code more robust by
memset(3)'ing to zero the LLVMOpInfo1 struct before then setting
SymbolicOp.Value before for the call to getOpInfo.  And also don't use any
values from the  LLVMOpInfo1 struct if getOpInfo returns 0.  And also don't
use any of the ReferenceType or ReferenceName values from SymbolLookUp if it
returns NULL. rdar://10873563 and rdar://10873683

For the X86 target also fixed bugs so the annotations get printed. 

Also fixed a few places in the ARM target that was not producing symbolic
operands for some instructions.  rdar://10878166

llvm-svn: 151267

1 files changed, 5 insertions, 0 deletions

diff --git a/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.h b/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.h
index 7caee73268d..fae309b45d0 100644
--- a/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.h
+++ b/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.h
@@ -459,6 +459,11 @@ struct InternalInstruction {
   uint8_t addressSize;
   uint8_t displacementSize;
   uint8_t immediateSize;
+
+  /* Offsets from the start of the instruction to the pieces of data, which is
+     needed to find relocation entries for adding symbolic operands */
+  uint8_t displacementOffset;
+  uint8_t immediateOffset;
   
   /* opcode state */