Vendor import of llvm trunk r154661:

http://llvm.org/svn/llvm-project/llvm/trunk@r154661

1 files changed, 15 insertions, 3 deletions

diff --git a/lib/MC/MCDisassembler/Disassembler.cpp b/lib/MC/MCDisassembler/Disassembler.cpp
index 16e66dc..35f675d 100644
--- a/lib/MC/MCDisassembler/Disassembler.cpp
+++ b/lib/MC/MCDisassembler/Disassembler.cpp
@@ -15,10 +15,13 @@
 #include "llvm/MC/MCDisassembler.h"
 #include "llvm/MC/MCInst.h"
 #include "llvm/MC/MCInstPrinter.h"
+#include "llvm/MC/MCInstrInfo.h"
 #include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSubtargetInfo.h"
 #include "llvm/Support/MemoryObject.h"
 #include "llvm/Support/TargetRegistry.h"
 #include "llvm/Support/TargetSelect.h"
+#include "llvm/Support/ErrorHandling.h"
 
 namespace llvm {
 class Target;
@@ -36,6 +39,12 @@ LLVMDisasmContextRef LLVMCreateDisasm(const char *TripleName, void *DisInfo,
                                       int TagType, LLVMOpInfoCallback GetOpInfo,
                                       LLVMSymbolLookupCallback SymbolLookUp) {
   // Initialize targets and assembly printers/parsers.
+  // FIXME: Clients are responsible for initializing the targets. And this
+  // would be done by calling routines in "llvm-c/Target.h" which are static
+  // line functions. But the current use of LLVMCreateDisasm() is to dynamically
+  // load libLTO with dlopen() and then lookup the symbols using dlsym().
+  // And since these initialize routines are static that does not work which
+  // is why the call to them in this 'C' library API was added back.
   llvm::InitializeAllTargetInfos();
   llvm::InitializeAllTargetMCs();
   llvm::InitializeAllAsmParsers();
@@ -50,6 +59,9 @@ LLVMDisasmContextRef LLVMCreateDisasm(const char *TripleName, void *DisInfo,
   const MCAsmInfo *MAI = TheTarget->createMCAsmInfo(TripleName);
   assert(MAI && "Unable to create target asm info!");
 
+  const MCInstrInfo *MII = TheTarget->createMCInstrInfo();
+  assert(MII && "Unable to create target instruction info!");
+
   const MCRegisterInfo *MRI = TheTarget->createMCRegInfo(TripleName);
   assert(MRI && "Unable to create target register info!");
 
@@ -73,13 +85,13 @@ LLVMDisasmContextRef LLVMCreateDisasm(const char *TripleName, void *DisInfo,
   // Set up the instruction printer.
   int AsmPrinterVariant = MAI->getAssemblerDialect();
   MCInstPrinter *IP = TheTarget->createMCInstPrinter(AsmPrinterVariant,
-                                                     *MAI, *STI);
+                                                     *MAI, *MII, *MRI, *STI);
   assert(IP && "Unable to create instruction printer!");
 
   LLVMDisasmContext *DC = new LLVMDisasmContext(TripleName, DisInfo, TagType,
                                                 GetOpInfo, SymbolLookUp,
                                                 TheTarget, MAI, MRI,
-                                                Ctx, DisAsm, IP);
+                                                STI, MII, Ctx, DisAsm, IP);
   assert(DC && "Allocation failure!");
 
   return DC;
@@ -170,5 +182,5 @@ size_t LLVMDisasmInstruction(LLVMDisasmContextRef DCR, uint8_t *Bytes,
     return Size;
   }
   }
-  return 0;
+  llvm_unreachable("Invalid DecodeStatus!");
 }