[Beignet] [PATCH] Fix a indirect argument load bug.

[Yang Rong]

If use arg as non add instruction's source directly, for example phi and selection, there is no add, just skip it.

Signed-off-by: Yang Rong <rong.r.yang at intel.com>
---
 backend/src/ir/lowering.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/backend/src/ir/lowering.cpp b/backend/src/ir/lowering.cpp
index e17248a..9fcdf74 100644
--- a/backend/src/ir/lowering.cpp
+++ b/backend/src/ir/lowering.cpp
@@ -330,6 +330,7 @@ namespace ir {
 
           indirectSeq.push_back(indirectLoad);
         } else {
+          if(it == addPtrInsns.end()) continue;  //use arg as phi or selection, no add, skip it.
           auto dstIt = addPtrInsns.find(dst);
           if(dstIt == addPtrInsns.end())
             addPtrInsns.insert(std::make_pair(dst, it->second));
-- 
1.8.3.2