MFC r258054: Update LLDB to upstream r194122 snapshot

  Inludes minor changes relative to upstream, for compatibility with
  FreeBSD's in-tree LLVM 3.3:

  - Reverted LLDB r191806, restoring use of previous API.
  - Reverted part of LLDB r189317, restoring previous enum names.
  - Work around missing LLVM r192504, using previous registerEHFrames API
    (limited functionality).
  - Removed PlatformWindows header include and init/terminate calls.

Sponsored by:	DARPA, AFRL

1 files changed, 47 insertions, 3 deletions

diff --git a/contrib/llvm/tools/lldb/source/Expression/IRInterpreter.cpp b/contrib/llvm/tools/lldb/source/Expression/IRInterpreter.cpp
index dcbf584..71ef8d6 100644
--- a/contrib/llvm/tools/lldb/source/Expression/IRInterpreter.cpp
+++ b/contrib/llvm/tools/lldb/source/Expression/IRInterpreter.cpp
@@ -14,6 +14,7 @@
 #include "lldb/Core/StreamString.h"
 #include "lldb/Expression/IRMemoryMap.h"
 #include "lldb/Expression/IRInterpreter.h"
+#include "lldb/Host/Endian.h"
 
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/DataLayout.h"
@@ -321,13 +322,19 @@ public:
         if (!ResolveConstantValue(resolved_value, constant))
             return false;
         
-        const uint64_t *raw_data = resolved_value.getRawData();
-            
+        lldb_private::StreamString buffer (lldb_private::Stream::eBinary,
+                                           m_memory_map.GetAddressByteSize(),
+                                           m_memory_map.GetByteOrder());
+        
         size_t constant_size = m_target_data.getTypeStoreSize(constant->getType());
         
+        const uint64_t *raw_data = resolved_value.getRawData();
+        
+        buffer.PutRawBytes(raw_data, constant_size, lldb::endian::InlHostByteOrder());
+        
         lldb_private::Error write_error;
         
-        m_memory_map.WriteMemory(process_address, (uint8_t*)raw_data, constant_size, write_error);
+        m_memory_map.WriteMemory(process_address, (const uint8_t*)buffer.GetData(), constant_size, write_error);
         
         return write_error.Success();
     }
@@ -517,6 +524,7 @@ IRInterpreter::CanInterpret (llvm::Module &module,
             case Instruction::SRem:
             case Instruction::Store:
             case Instruction::Sub:
+            case Instruction::Trunc:
             case Instruction::UDiv:
             case Instruction::URem:
             case Instruction::Xor:
@@ -1162,6 +1170,42 @@ IRInterpreter::Interpret (llvm::Module &module,
                 }
             }
                 break;
+            case Instruction::Trunc:
+            {
+                const TruncInst *trunc_inst = dyn_cast<TruncInst>(inst);
+                
+                if (!trunc_inst)
+                {
+                    if (log)
+                        log->Printf("getOpcode() returns Trunc, but instruction is not a TruncInst");
+                    error.SetErrorToGenericError();
+                    error.SetErrorString(interpreter_internal_error);
+                    return false;
+                }
+                
+                Value *src_operand = trunc_inst->getOperand(0);
+                
+                lldb_private::Scalar I;
+                
+                if (!frame.EvaluateValue(I, src_operand, module))
+                {
+                    if (log)
+                        log->Printf("Couldn't evaluate %s", PrintValue(src_operand).c_str());
+                    error.SetErrorToGenericError();
+                    error.SetErrorString(bad_value_error);
+                    return false;
+                }
+                
+                frame.AssignValue(inst, I, module);
+                
+                if (log)
+                {
+                    log->Printf("Interpreted a Trunc");
+                    log->Printf("  Src : %s", frame.SummarizeValue(src_operand).c_str());
+                    log->Printf("  =   : %s", frame.SummarizeValue(inst).c_str());
+                }
+            }
+                break;
             case Instruction::Load:
             {
                 const LoadInst *load_inst = dyn_cast<LoadInst>(inst);