Table-driven disassembler for the X86 architecture (16-, 32-, and 64-bit

incarnations), integrated into the MC framework.  

The disassembler is table-driven, using a custom TableGen backend to 
generate hierarchical tables optimized for fast decode.  The disassembler 
consumes MemoryObjects and produces arrays of MCInsts, adhering to the 
abstract base class MCDisassembler (llvm/MC/MCDisassembler.h).

The disassembler is documented in detail in

- lib/Target/X86/Disassembler/X86Disassembler.cpp (disassembler runtime)
- utils/TableGen/DisassemblerEmitter.cpp (table emitter)

You can test the disassembler by running llvm-mc -disassemble for i386
or x86_64 targets.  Please let me know if you encounter any problems
with it.

llvm-svn: 91749

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/lib/Target/X86/X86TargetMachine.cpp b/llvm/lib/Target/X86/X86TargetMachine.cpp
index 0152121e531..90d9083d78b 100644
--- a/llvm/lib/Target/X86/X86TargetMachine.cpp
+++ b/llvm/lib/Target/X86/X86TargetMachine.cpp
@@ -38,6 +38,8 @@ static const MCAsmInfo *createMCAsmInfo(const Target &T, StringRef TT) {
   }
 }
 
+extern "C" void LLVMInitializeX86Disassembler();
+
 extern "C" void LLVMInitializeX86Target() { 
   // Register the target.
   RegisterTargetMachine<X86_32TargetMachine> X(TheX86_32Target);
@@ -47,6 +49,8 @@ extern "C" void LLVMInitializeX86Target() {
   RegisterAsmInfoFn A(TheX86_32Target, createMCAsmInfo);
   RegisterAsmInfoFn B(TheX86_64Target, createMCAsmInfo);
 
+  LLVMInitializeX86Disassembler();
+
   // Register the code emitter.
   TargetRegistry::RegisterCodeEmitter(TheX86_32Target, createX86MCCodeEmitter);
   TargetRegistry::RegisterCodeEmitter(TheX86_64Target, createX86MCCodeEmitter);