[Beignet] [PATCH 3/3] llvm3.9 will assert if ouput is empty string.

[xionghu . luo]

From: Luo Xionghu <xionghu....@intel.com>

Signed-off-by: Luo Xionghu <xionghu....@intel.com>
---
 backend/src/backend/program.cpp | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/backend/src/backend/program.cpp b/backend/src/backend/program.cpp
index 8a4ad83..8b8abc4 100644
--- a/backend/src/backend/program.cpp
+++ b/backend/src/backend/program.cpp
@@ -1114,8 +1114,10 @@ EXTEND_QUOTE:
                                     stringSize, err, errSize, optLevel, 
options);
       if (err != NULL)
         *errSize += clangErrSize;
-      if (OCL_OUTPUT_BUILD_LOG && err)
-        llvm::errs() << options << "\n" << err;
+      if (OCL_OUTPUT_BUILD_LOG && options)
+        llvm::errs() << "options:" << options << "\n";
+      if (OCL_OUTPUT_BUILD_LOG && err && *errSize)
+        llvm::errs() << err << "\n";
     } else
       p = NULL;
 
@@ -1168,8 +1170,10 @@ EXTEND_QUOTE:
 
       p = gbe_program_new_gen_program(deviceID, out_module, NULL, NULL);
 
-      if (OCL_OUTPUT_BUILD_LOG && err)
-        llvm::errs() << options << "\n" << err;
+      if (OCL_OUTPUT_BUILD_LOG && options)
+        llvm::errs() << "options:" << options << "\n";
+      if (OCL_OUTPUT_BUILD_LOG && err && *errSize)
+        llvm::errs() << err << "\n";
     } else
       p = NULL;
     releaseLLVMContextLock();
-- 
2.5.0

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