Path from Ashok Thirumurthi:

The attached patch adds eValueTypeVector to lldb_private::Value.  The nested struct Vector is patterned after RegisterValue::m_data.buffer.  This change to Value allows ClangExpressionDeclMap::LookupDecl to return vector register data for consumption by InterpreterStackFrame::ResolveValue.  Note that ResolveValue was tweaked slightly to allocate enough memory for vector registers.
 
An immediate result of this patch is that "expr $xmm0" generates the same results on Linux as on the Mac, which is good enough for TestRegisters.py.  In addition, the log of m_memory.PrintData(data_region.m_base, data_region.m_extent) shows that the register content has been resolved successfully.  On the other hand, the output is glaringly empty:
    runCmd: expr $xmm0
    output: (unsigned char __attribute__((ext_vector_type(16)))) $0 = {}
    Expecting sub string: vector_type
    Matched

llvm-svn: 167033

1 files changed, 5 insertions, 1 deletions

diff --git a/lldb/source/Expression/IRInterpreter.cpp b/lldb/source/Expression/IRInterpreter.cpp
index 421b4f9921a..4211c876bc6 100644
--- a/lldb/source/Expression/IRInterpreter.cpp
+++ b/lldb/source/Expression/IRInterpreter.cpp
@@ -676,7 +676,11 @@ public:
                     if (bare_register)
                         indirect_variable = false;
                     
-                    Memory::Region data_region = m_memory.Malloc(value->getType());
+                    lldb_private::RegisterInfo *reg_info = resolved_value.GetRegisterInfo();
+                    Memory::Region data_region = (reg_info->encoding == lldb::eEncodingVector) ?
+                        m_memory.Malloc(reg_info->byte_size, m_target_data.getPrefTypeAlignment(value->getType())) :
+                        m_memory.Malloc(value->getType());
+
                     data_region.m_allocation->m_origin = resolved_value;
                     Memory::Region ref_region = m_memory.Malloc(value->getType());
                     Memory::Region pointer_region;