[Beignet] [PATCH 1/2] fix newer gcc warning "variable set but not used".

[xionghu.luo at intel.com]

From: Luo Xionghu <xionghu.luo at intel.com>

this warning appeared in gcc 4.9.1, declear the variables with attribute
((unused)).

Signed-off-by: Luo Xionghu <xionghu.luo at intel.com>
---
 backend/src/backend/program.cpp          | 3 ++-
 backend/src/llvm/ExpandLargeIntegers.cpp | 3 ++-
 backend/src/llvm/llvm_bitcode_link.cpp   | 3 ++-
 backend/src/llvm/llvm_printf_parser.cpp  | 1 -
 4 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/backend/src/backend/program.cpp b/backend/src/backend/program.cpp
index eee7c3c..9e0bc66 100644
--- a/backend/src/backend/program.cpp
+++ b/backend/src/backend/program.cpp
@@ -655,7 +655,8 @@ namespace gbe {
     std::string hdirs = OCL_HEADER_FILE_DIR;
     std::istringstream hidirs(hdirs);
     std::string headerFilePath;
-    bool findOcl = false;
+    bool findOcl __attribute__ ((unused));
+    findOcl = false;
 
     while (getline(hidirs, headerFilePath, ':')) {
       std::string oclDotHName = headerFilePath + "/ocl.h";
diff --git a/backend/src/llvm/ExpandLargeIntegers.cpp b/backend/src/llvm/ExpandLargeIntegers.cpp
index f7e59a5..d7440aa 100644
--- a/backend/src/llvm/ExpandLargeIntegers.cpp
+++ b/backend/src/llvm/ExpandLargeIntegers.cpp
@@ -442,7 +442,8 @@ static void convertInstruction(Instruction *Inst, ConversionState &State,
   } else if (TruncInst *Trunc = dyn_cast<TruncInst>(Inst)) {
     Value *Operand = Trunc->getOperand(0);
     assert(shouldConvert(Operand) && "TruncInst is expandable but not its op");
-    TypePair OpTys = getExpandedIntTypes(Operand->getType());
+    TypePair OpTys __attribute__ ((unused));
+    OpTys = getExpandedIntTypes(Operand->getType());
     ValuePair Ops = State.getConverted(Operand);
     if (!shouldConvert(Inst)) {
       Value *NewInst = IRB.CreateTrunc(Ops.Lo, Trunc->getType(), Name);
diff --git a/backend/src/llvm/llvm_bitcode_link.cpp b/backend/src/llvm/llvm_bitcode_link.cpp
index ebf4386..c9824e7 100644
--- a/backend/src/llvm/llvm_bitcode_link.cpp
+++ b/backend/src/llvm/llvm_bitcode_link.cpp
@@ -51,7 +51,8 @@ namespace gbe
     std::string bitCodeFiles = OCL_BITCODE_LIB_PATH;
     std::istringstream bitCodeFilePath(bitCodeFiles);
     std::string FilePath;
-    bool findBC = false;
+    bool findBC __attribute__ ((unused));
+    findBC = false;
     Module* oclLib = NULL;
     SMDiagnostic Err;
 
diff --git a/backend/src/llvm/llvm_printf_parser.cpp b/backend/src/llvm/llvm_printf_parser.cpp
index 2f85443..712c478 100644
--- a/backend/src/llvm/llvm_printf_parser.cpp
+++ b/backend/src/llvm/llvm_printf_parser.cpp
@@ -503,7 +503,6 @@ error:
     info.printf_fmt = printf_fmt;
 
     sizeof_size = 0;
-    int i = 1;
     for (auto &s : (*printf_fmt).first) {
       int sz = 0;
       if (s.type == PRINTF_SLOT_TYPE_STRING)
-- 
2.1.0