git head (f48b4f6766fcaa193652fcbe6ea0bb29f92e45aa):
(gdb) run
Starting program: /home/rnpalmer/Debian/builds/stackbuild/a.out
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
built 0 stringInput.cl:11:11: warning: SKIP is not defined, will define it to 1. Tests may crash on large fields.

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff3f6d3a5 in llvm::Use::set(llvm::Value*) ()
   from /home/rnpalmer/Debian/builds/stackbuild/beignet/build/backend/src/libgbe.so
(gdb) bt full
#0  0x00007ffff3f6d3a5 in llvm::Use::set(llvm::Value*) ()
   from /home/rnpalmer/Debian/builds/stackbuild/beignet/build/backend/src/libgbe.so
No symbol table info available.
#1  0x00007ffff4ae8481 in llvm::BinaryOperator::BinaryOperator(llvm::Instruction::BinaryOps, llvm::Value*, llvm::Value*, llvm::Type*, llvm::Twine const&, llvm::Instruction*) ()
   from /home/rnpalmer/Debian/builds/stackbuild/beignet/build/backend/src/libgbe.so
No symbol table info available.
#2  0x00007ffff4ae8587 in llvm::BinaryOperator::Create(llvm::Instruction::BinaryOps, llvm::Value*, llvm::Value*, llvm::Twine const&, llvm::Instruction*) ()
   from /home/rnpalmer/Debian/builds/stackbuild/beignet/build/backend/src/libgbe.so
No symbol table info available.
#3  0x00007ffff3c8c07b in llvm::IRBuilder<true, llvm::ConstantFolder, llvm::IRBuilderDefaultInserter<true> >::CreateInsertNUWNSWBinOp (HasNSW=false,
    HasNUW=false, Name=..., RHS=<optimized out>, LHS=<optimized out>,
    Opc=llvm::Instruction::Mul, this=<optimized out>)
    at /usr/lib/llvm-3.5/include/llvm/IR/IRBuilder.h:615
        BO = <optimized out>
#4  llvm::IRBuilder<true, llvm::ConstantFolder, llvm::IRBuilderDefaultInserter<true> >::CreateMul (HasNSW=false, HasNUW=false, Name=..., RHS=<optimized out>,
---Type <return> to continue, or q <return> to quit---
    LHS=<optimized out>, this=<optimized out>)
    at /usr/lib/llvm-3.5/include/llvm/IR/IRBuilder.h:682
        HasNSW = false
        HasNUW = false
        RHS = <optimized out>
        LHS = <optimized out>
        this = <optimized out>
        Name = @0x7fffffffd310: {LHS = {twine = 0x0, cString = 0x0,
            stdString = 0x0, stringRef = 0x0, character = 0 '\000', decUI = 0,
            decI = 0, decUL = 0x0, decL = 0x0, decULL = 0x0, decLL = 0x0,
            uHex = 0x0}, RHS = {twine = 0xffffffffffffffff,
            cString = 0xffffffffffffffff <error: Cannot access memory at address 0xffffffffffffffff>, stdString = 0xffffffffffffffff,
            stringRef = 0xffffffffffffffff, character = -1 '\377',
            decUI = 4294967295, decI = -1, decUL = 0xffffffffffffffff,
            decL = 0xffffffffffffffff, decULL = 0xffffffffffffffff,
            decLL = 0xffffffffffffffff, uHex = 0xffffffffffffffff},
          LHSKind = 1 '\001', RHSKind = 1 '\001'}
#5  gbe::PrintfParser::generateOnePrintfInstruction (this=this@entry=0x8c6c90,
    pInfo=...)
    at /home/rnpalmer/Debian/builds/stackbuild/beignet/backend/src/llvm/llvm_printf_parser.cpp:391
        op0 = 0x0
---Type <return> to continue, or q <return> to quit---
        val = 0x0
        i = <optimized out>
        data_addr = <optimized out>
        printf_inst = 0x7fffffffd340
#6  0x00007ffff3c8d82f in gbe::PrintfParser::runOnFunction (this=0x8c6c90,
    F=...)
    at /home/rnpalmer/Debian/builds/stackbuild/beignet/backend/src/llvm/llvm_printf_parser.cpp:724
        pInfo = {call = 0x8822e0, printf_fmt = 0x88cb20}
        __for_range = std::vector of length 24, capacity 32 = {{
            call = 0x8822e0, printf_fmt = 0x88cb20}, {call = 0xaf6d60,
            printf_fmt = 0xc1bcf0}, {call = 0xae1450, printf_fmt = 0x88e340}, {
            call = 0xa3d570, printf_fmt = 0x6de6e0}, {call = 0xaebb00,
            printf_fmt = 0x88d010}, {call = 0x8b7490, printf_fmt = 0xa2db00}, {
            call = 0xaf33f0, printf_fmt = 0x88cb80}, {call = 0x675f68,
            printf_fmt = 0xafac60}, {call = 0xafdb60, printf_fmt = 0x96d960}, {
            call = 0x6de760, printf_fmt = 0x8c54b0}, {call = 0xc8fec8,
            printf_fmt = 0x6de510}, {call = 0xc957d0, printf_fmt = 0xc944a0}, {
            call = 0xae1350, printf_fmt = 0xa2e4b0}, {call = 0x674908,
            printf_fmt = 0xc918b0}, {call = 0x6749e8, printf_fmt = 0x88c9d0}, {
            call = 0xa3ca20, printf_fmt = 0xaedca0}, {call = 0xaf7900,
            printf_fmt = 0x88ca00}, {call = 0xa7a2c0, printf_fmt = 0x88ce50}, {
            call = 0x674cb0, printf_fmt = 0x88ce80}, {call = 0xafe398,
---Type <return> to continue, or q <return> to quit---
            printf_fmt = 0x88ca60}, {call = 0x6d4418, printf_fmt = 0x88ca90}, {
            call = 0x6d44b0, printf_fmt = 0x972d50}, {call = 0x6ada80,
            printf_fmt = 0x973220}, {call = 0xaeb818, printf_fmt = 0x9731f0}}
        bKernel = <optimized out>
        gFun = <optimized out>
        gFun2 = <optimized out>
        hasPrintf = <optimized out>
        __PRETTY_FUNCTION__ = "virtual bool gbe::PrintfParser::runOnFunction(llvm::Function&)"
        infoVect = std::vector of length 24, capacity 32 = {{call = 0x8822e0,
            printf_fmt = 0x88cb20}, {call = 0xaf6d60, printf_fmt = 0xc1bcf0}, {
            call = 0xae1450, printf_fmt = 0x88e340}, {call = 0xa3d570,
            printf_fmt = 0x6de6e0}, {call = 0xaebb00, printf_fmt = 0x88d010}, {
            call = 0x8b7490, printf_fmt = 0xa2db00}, {call = 0xaf33f0,
            printf_fmt = 0x88cb80}, {call = 0x675f68, printf_fmt = 0xafac60}, {
            call = 0xafdb60, printf_fmt = 0x96d960}, {call = 0x6de760,
            printf_fmt = 0x8c54b0}, {call = 0xc8fec8, printf_fmt = 0x6de510}, {
            call = 0xc957d0, printf_fmt = 0xc944a0}, {call = 0xae1350,
            printf_fmt = 0xa2e4b0}, {call = 0x674908, printf_fmt = 0xc918b0}, {
            call = 0x6749e8, printf_fmt = 0x88c9d0}, {call = 0xa3ca20,
            printf_fmt = 0xaedca0}, {call = 0xaf7900, printf_fmt = 0x88ca00}, {
            call = 0xa7a2c0, printf_fmt = 0x88ce50}, {call = 0x674cb0,
            printf_fmt = 0x88ce80}, {call = 0xafe398, printf_fmt = 0x88ca60}, {
---Type <return> to continue, or q <return> to quit---
            call = 0x6d4418, printf_fmt = 0x88ca90}, {call = 0x6d44b0,
            printf_fmt = 0x972d50}, {call = 0x6ada80, printf_fmt = 0x973220}, {
            call = 0xaeb818, printf_fmt = 0x9731f0}}
#7  0x00007ffff4afded7 in llvm::FPPassManager::runOnFunction(llvm::Function&)
    ()
   from /home/rnpalmer/Debian/builds/stackbuild/beignet/build/backend/src/libgbe.so
No symbol table info available.
#8  0x00007ffff49119ae in (anonymous namespace)::CGPassManager::runOnModule(llvm::Module&) ()
   from /home/rnpalmer/Debian/builds/stackbuild/beignet/build/backend/src/libgbe.so
No symbol table info available.
#9  0x00007ffff4afdb64 in llvm::legacy::PassManagerImpl::run(llvm::Module&) ()
   from /home/rnpalmer/Debian/builds/stackbuild/beignet/build/backend/src/libgbe.so
No symbol table info available.

#10 0x00007ffff3cafc2e in gbe::llvmToGen (unit=...,
    fileName=fileName@entry=0x0, module=module@entry=0xa44750,
    optLevel=optLevel@entry=1, strictMath=<optimized out>)
    at /home/rnpalmer/Debian/builds/stackbuild/beignet/backend/src/llvm/llvm_to_gen.cpp:308
        errInfo = ""
---Type <return> to continue, or q <return> to quit---
        o = std::unique_ptr<llvm::raw_fd_ostream> containing 0x0
        Err = {SM = 0x0, Loc = {Ptr = 0x0}, Filename = "", LineNo = 0,
          ColumnNo = 0, Kind = llvm::SourceMgr::DK_Error, Message = "",
          LineContents = "", Ranges = std::vector of length 0, capacity 0,
          FixIts = {<llvm::SmallVectorImpl<llvm::SMFixIt>> = {<llvm::SmallVectorTemplateBase<llvm::SMFixIt, false>> = {<llvm::SmallVectorTemplateCommon<llvm::SMFixIt, void>> = {<llvm::SmallVectorBase> = {BeginX = 0x7fffffffdd30,
                    EndX = 0x7fffffffdd30, CapacityX = 0x7fffffffddf0},
                  FirstEl = {<llvm::AlignedCharArray<8ul, 48ul>> = {
                      buffer = "\000\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\300\336\377\377\377\177\000\000\060\304\251\000\000\000\000\000\060\304\251\000\000\000\000\000\270\350\022\365\377\177\000"}, <No data fields>}}, <No data fields>}, <No data fields>}, Storage = {InlineElts = {
                {<llvm::AlignedCharArray<8ul, 48ul>> = {
                    buffer = "`\023m\000\000\000\000\000\250\350\022\365\377\177\000\000\300\336\377\377\377\177\000\000iY\213\364\377\177\000\000\060\304\247\000\000\000\000\000\024\003\000\000\000\000\000"}, <No data fields>},
                {<llvm::AlignedCharArray<8ul, 48ul>> = {
                    buffer = "\000\b\000\000\000\000\000\000PG\244\000\000\000\000\000\270\350\022\365\377\177\000\000\001", '\000' <repeats 15 times>, "\374\377\377\377\377\377\377\377"}, <No data fields>},
                {<llvm::AlignedCharArray<8ul, 48ul>> = {
                    buffer = "\000\000\000\000\000\000\000\000\300\336\377\377\3---Type <return> to continue, or q <return> to quit---
77\177\000\000\270\350\022\365\377\177\000\000\001", '\000' <repeats 15 times>, "\370\377\377\377\377\377\377\377"}, <No data fields>}}}}}
        cl_mod = <optimized out>
        M = std::unique_ptr<llvm::Module> containing 0x6c3680
        DL = {LittleEndian = true, StackNaturalAlign = 0,
          ManglingMode = llvm::DataLayout::MM_None,
          LegalIntWidths = {<llvm::SmallVectorImpl<unsigned char>> = {<llvm::SmallVectorTemplateBase<unsigned char, true>> = {<llvm::SmallVectorTemplateCommon<unsigned char, void>> = {<llvm::SmallVectorBase> = {BeginX = 0x7fffffffdb38,
                    EndX = 0x7fffffffdb38, CapacityX = 0x7fffffffdb40},
                  FirstEl = {<llvm::AlignedCharArray<1ul, 1ul>> = {
                      buffer = "\340"}, <No data fields>}}, <No data fields>}, <No data fields>}, Storage = {InlineElts = {
                {<llvm::AlignedCharArray<1ul, 1ul>> = {
                    buffer = "\334"}, <No data fields>},
                {<llvm::AlignedCharArray<1ul, 1ul>> = {
                    buffer = "\377"}, <No data fields>},
                {<llvm::AlignedCharArray<1ul, 1ul>> = {
                    buffer = "\377"}, <No data fields>},
                {<llvm::AlignedCharArray<1ul, 1ul>> = {
                    buffer = "\001"}, <No data fields>},
                {<llvm::AlignedCharArray<1ul, 1ul>> = {
                    buffer = ""}, <No data fields>},
---Type <return> to continue, or q <return> to quit---
                {<llvm::AlignedCharArray<1ul, 1ul>> = {
                    buffer = ""}, <No data fields>},
                {<llvm::AlignedCharArray<1ul, 1ul>> = {
                    buffer = ""}, <No data fields>}}}},
          Alignments = {<llvm::SmallVectorImpl<llvm::LayoutAlignElem>> = {<llvm::SmallVectorTemplateBase<llvm::LayoutAlignElem, false>> = {<llvm::SmallVectorTemplateCommon<llvm::LayoutAlignElem, void>> = {<llvm::SmallVectorBase> = {
                    BeginX = 0x95cec0, EndX = 0x95cf68, CapacityX = 0x95cfc0},
                  FirstEl = {<llvm::AlignedCharArray<4ul, 8ul>> = {
                      buffer = "P1l\000\000\000\000"}, <No data fields>}}, <No data fields>}, <No data fields>}, Storage = {InlineElts = {
                {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\240G\244\000\000\000\000"}, <No data fields>},
                {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\320\063l\000\000\000\000"}, <No data fields>},
                {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\001\000\000\000\000\000\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "5\021\260\364\377\177\000"}, <No data fields>},
                {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\362\063l\000\000\000\000"}, <No data fields>},
                {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\230\310\250\000\000\000\000"}, <No data fields>},---Type <return> to continue, or q <return> to quit---
 {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "Pj\245\000\000\000\000"}, <No data fields>},
                {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\001\000\000\000\000\000\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\300\033\256\000\000\000\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\024I\213\364\377\177\000"}, <No data fields>},
                {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\001\000\000\000\000\000\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\340\334\377\377\377\177\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\bG\244\000\000\000\000"}, <No data fields>},
                {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\250\350\022\365\377\177\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\240\350\241\000\000\000\000"}, <No data fields>}}}},
          Pointers = {<llvm::SmallVectorImpl<llvm::PointerAlignElem>> = {<llvm::SmallVectorTemplateBase<llvm::PointerAlignElem, false>> = {<llvm::SmallVectorTemplateCommon<llvm::PointerAlignElem, void>> = {<llvm::SmallVectorBase> = {
                    BeginX = 0x7fffffffdbf0, EndX = 0x7fffffffdc00,
---Type <return> to continue, or q <return> to quit---
                    CapacityX = 0x7fffffffdc70},
                  FirstEl = {<llvm::AlignedCharArray<4ul, 16ul>> = {
                      buffer = "\004\000\000\000\004\000\000\000\004\000\000\000\000\000\000"}, <No data fields>}}, <No data fields>}, <No data fields>},
            Storage = {InlineElts = {{<llvm::AlignedCharArray<4ul, 16ul>> = {
                    buffer = "HG\244\000\000\000\000\000\bG\244\000\000\000\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 16ul>> = {
                    buffer = "\001\000\000\000\000\000\000\000@\350\241\000\000\000\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 16ul>> = {
                    buffer = "\200\334\377\377\377\177\000\000\025\000\000\000\000\000\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 16ul>> = {
                    buffer = "PG\244\000\000\000\000\000\336U\336\367\377\177\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 16ul>> = {
                    buffer = "\270\334\377\377\377\177\000\000\200\334\377\377\377\177\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 16ul>> = {
                    buffer = "(-=\367\377\177\000\000\200}=\367\377\177\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 16ul>> = {
                    buffer = "\003", '\000' <repeats 14 times>}, <No data fields>}}}}, static InvalidAlignmentElem = {AlignType = 0, TypeBitWidth = 0,
            ABIAlign = 0, PrefAlign = 0}, static InvalidPointerElem = {
            ABIAlign = 0, PrefAlign = 0, TypeByteWidth = 0,
            AddressSpace = 4294967295}, LayoutMap = 0x0}
        TargetTriple = {Data = "spir", Arch = llvm::Triple::spir,
---Type <return> to continue, or q <return> to quit---
          SubArch = llvm::Triple::NoSubArch,
          Vendor = llvm::Triple::UnknownVendor, OS = llvm::Triple::UnknownOS,
          Environment = llvm::Triple::UnknownEnvironment,
          ObjectFormat = llvm::Triple::ELF}
        libraryInfo = 0xaf6f60
        passes = <incomplete type>
        iter = <optimized out>

#11 0x00007ffff3c35651 in gbe::Program::buildFromLLVMFile (
    this=this@entry=0xae7d20, fileName=fileName@entry=0x0, module=0xa44750,
    error="", optLevel=optLevel@entry=1)
    at /home/rnpalmer/Debian/builds/stackbuild/beignet/backend/src/backend/program.cpp:124
        unit = 0x6d12e0
        cloned_module = 0x6d1360
#12 0x00007ffff3d2bdbf in gbe::genProgramBuildFromLLVM (program=0xae7d20,
    stringSize=1000, err=0xae5b50 "", errSize=0xafb270,
    options=<optimized out>)
    at /home/rnpalmer/Debian/builds/stackbuild/beignet/backend/src/backend/gen_program.cpp:443
        error = ""
        optLevel = 1
        p = 0xae7d20
        module = <optimized out>
---Type <return> to continue, or q <return> to quit---
#13 0x00007ffff778bbb4 in cl_program_link (context=<optimized out>,
    num_input_programs=<optimized out>, input_programs=<optimized out>,
    options=<optimized out>, errcode_ret=errcode_ret@entry=0x7fffffffdf8c)
    at /home/rnpalmer/Debian/builds/stackbuild/beignet/src/cl_program.c:679
        p = 0xafb1e0
        err = 0
        i = <optimized out>
        copyed = 0
        ret = 0
        avialable_program = 0
#14 0x00007ffff7783741 in clLinkProgram (context=<optimized out>,
    num_devices=<optimized out>, device_list=<optimized out>,
    options=<optimized out>, num_input_programs=<optimized out>,
    input_programs=<optimized out>, pfn_notify=0x0, user_data=0x0,
    errcode_ret=0x0)
    at /home/rnpalmer/Debian/builds/stackbuild/beignet/src/cl_api.c:1022
        err = 0
        program = 0x0
#15 0x0000000000400fc1 in main (argc=1, argv=0x7fffffffe158)
    at opencl_test.c:36
        platform = 0x7ffff79d08c0 <intel_platform_data>
        device = 0x7ffff79d3c80 <intel_ivb_gt2_device>
        status = 0
---Type <return> to continue, or q <return> to quit---
        ret = 2
        ctx = 0x67faa0
        queue = 0x6d85d0
        program = 0x6a7f40
        program2 = 0x100000000
        kernel = 0x4011ed <__libc_csu_init+77>
        buffer = 0x7ffff73df1a8
        kernel_finished = 0x7ffff7de9e17
        f = 0x6683d0
        n = 3
        test_data = "\003\a\005"
        kernel_source = 0x659180 "#define ffwidth 16\n#define SETUP __private size_t i __attribute__((aligned)) = 0; \\\n  __private size_t j __attribute__((aligned)) = 0; \\\n\\\n  __private const size_t maxf __attribute__((aligned)) = ((1 "...
        build_log = 0x667fd0 "stringInput.cl:11:11: warning: SKIP is not defined, will define it to 1. Tests may crash on large fields.\n"
(gdb)
(gdb)

git head, after a few changes unsuccessfully trying to get debug symbols (everything says it was built with -g, and libllvm3.5-dbg is installed):

(gdb) run
Starting program: /home/rnpalmer/Debian/builds/stackbuild/a.out 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
built 0 stringInput.cl:11:11: warning: SKIP is not defined, will define it to 1. Tests may crash on large fields.

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff4b0af28 in llvm::IntegerType::get(llvm::LLVMContext&, unsigned int)
    () from /home/test1/lib/beignet//libgbe.so
(gdb) bt full
#0  0x00007ffff4b0af28 in llvm::IntegerType::get(llvm::LLVMContext&, unsigned int) () from /home/test1/lib/beignet//libgbe.so
No symbol table info available.
#1  0x00007ffff4a59beb in llvm::ConstantInt::get(llvm::LLVMContext&, llvm::APInt const&) () from /home/test1/lib/beignet//libgbe.so
No symbol table info available.
#2  0x00007ffff4a59e2b in llvm::ConstantInt::get(llvm::IntegerType*, unsigned long, bool) () from /home/test1/lib/beignet//libgbe.so
No symbol table info available.
#3  0x00007ffff4a5f9bf in llvm::ConstantInt::get(llvm::Type*, unsigned long, bool) () from /home/test1/lib/beignet//libgbe.so
No symbol table info available.
#4  0x00007ffff4868f8a in llvm::InstCombiner::visitMul(llvm::BinaryOperator&)
    () from /home/test1/lib/beignet//libgbe.so
No symbol table info available.
#5  0x00007ffff481f475 in llvm::InstCombiner::DoOneIteration(llvm::Function&, unsigned int) () from /home/test1/lib/beignet//libgbe.so
No symbol table info available.
#6  0x00007ffff481ff45 in llvm::InstCombiner::runOnFunction(llvm::Function&) ()
   from /home/test1/lib/beignet//libgbe.so
No symbol table info available.
#7  0x00007ffff4afeed7 in llvm::FPPassManager::runOnFunction(llvm::Function&)
    () from /home/test1/lib/beignet//libgbe.so
---Type <return> to continue, or q <return> to quit---
No symbol table info available.
#8  0x00007ffff49129ae in (anonymous namespace)::CGPassManager::runOnModule(llvm::Module&) () from /home/test1/lib/beignet//libgbe.so
No symbol table info available.
#9  0x00007ffff4afeb64 in llvm::legacy::PassManagerImpl::run(llvm::Module&) ()
   from /home/test1/lib/beignet//libgbe.so
No symbol table info available.
#10 0x00007ffff3cb0c2e in gbe::llvmToGen (unit=..., 
    fileName=fileName@entry=0x0, module=module@entry=0xc1bbc0, 
    optLevel=optLevel@entry=1, strictMath=<optimized out>)
    at /home/rnpalmer/Debian/builds/stackbuild/beignet/backend/src/llvm/llvm_to_gen.cpp:308
        errInfo = ""
        o = std::unique_ptr<llvm::raw_fd_ostream> containing 0x0
        Err = {SM = 0x0, Loc = {Ptr = 0x0}, Filename = "", LineNo = 0, 
          ColumnNo = 0, Kind = llvm::SourceMgr::DK_Error, Message = "", 
          LineContents = "", Ranges = std::vector of length 0, capacity 0, 
          FixIts = {<llvm::SmallVectorImpl<llvm::SMFixIt>> = {<llvm::SmallVectorTemplateBase<llvm::SMFixIt, false>> = {<llvm::SmallVectorTemplateCommon<llvm::SMFixIt, void>> = {<llvm::SmallVectorBase> = {BeginX = 0x7fffffffe050, 
                    EndX = 0x7fffffffe050, CapacityX = 0x7fffffffe110}, 
                  FirstEl = {<llvm::AlignedCharArray<8ul, 48ul>> = {
                      buffer = "\000\000\000\000\000\000\000\000\001\000\000\000---Type <return> to continue, or q <return> to quit---
\000\000\000\000\340\341\377\377\377\177\000\000`\r\255\000\000\000\000\000`\r\255\000\000\000\000\000\270\370\022\365\377\177\000"}, <No data fields>}}, <No data fields>}, <No data fields>}, Storage = {InlineElts = {
                {<llvm::AlignedCharArray<8ul, 48ul>> = {
                    buffer = "\000Xi\000\000\000\000\000\250\370\022\365\377\177\000\000\340\341\377\377\377\177\000\000ii\213\364\377\177\000\000`\r\253\000\000\000\000\000\024\003\000\000\000\000\000"}, <No data fields>}, 
                {<llvm::AlignedCharArray<8ul, 48ul>> = {
                    buffer = "\000\b\000\000\000\000\000\000\300\273\301\000\000\000\000\000\270\370\022\365\377\177\000\000\001", '\000' <repeats 15 times>, "\374\377\377\377\377\377\377\377"}, <No data fields>}, 
                {<llvm::AlignedCharArray<8ul, 48ul>> = {
                    buffer = "\000\000\000\000\000\000\000\000\340\341\377\377\377\177\000\000\270\370\022\365\377\177\000\000\001", '\000' <repeats 15 times>, "\370\377\377\377\377\377\377\377"}, <No data fields>}}}}}
        cl_mod = <optimized out>
        M = std::unique_ptr<llvm::Module> containing 0x6a4540
        DL = {LittleEndian = true, StackNaturalAlign = 0, 
          ManglingMode = llvm::DataLayout::MM_None, 
          LegalIntWidths = {<llvm::SmallVectorImpl<unsigned char>> = {<llvm::SmallVectorTemplateBase<unsigned char, true>> = {<llvm::SmallVectorTemplateCommon<unsigned char, void>> = {<llvm::SmallVectorBase> = {BeginX = 0x7fffffffde58, 
                    EndX = 0x7fffffffde58, CapacityX = 0x7fffffffde60}, 
---Type <return> to continue, or q <return> to quit---
                  FirstEl = {<llvm::AlignedCharArray<1ul, 1ul>> = {
                      buffer = ""}, <No data fields>}}, <No data fields>}, <No data fields>}, Storage = {InlineElts = {{<llvm::AlignedCharArray<1ul, 1ul>> = {
                    buffer = "\340"}, <No data fields>}, 
                {<llvm::AlignedCharArray<1ul, 1ul>> = {
                    buffer = "\377"}, <No data fields>}, 
                {<llvm::AlignedCharArray<1ul, 1ul>> = {
                    buffer = "\377"}, <No data fields>}, 
                {<llvm::AlignedCharArray<1ul, 1ul>> = {
                    buffer = "\001"}, <No data fields>}, 
                {<llvm::AlignedCharArray<1ul, 1ul>> = {
                    buffer = ""}, <No data fields>}, 
                {<llvm::AlignedCharArray<1ul, 1ul>> = {
                    buffer = ""}, <No data fields>}, 
                {<llvm::AlignedCharArray<1ul, 1ul>> = {
                    buffer = ""}, <No data fields>}}}}, 
          Alignments = {<llvm::SmallVectorImpl<llvm::LayoutAlignElem>> = {<llvm::SmallVectorTemplateBase<llvm::LayoutAlignElem, false>> = {<llvm::SmallVectorTemplateCommon<llvm::LayoutAlignElem, void>> = {<llvm::SmallVectorBase> = {
                    BeginX = 0xadb340, EndX = 0xadb3e8, CapacityX = 0xadb440}, 
                  FirstEl = {<llvm::AlignedCharArray<4ul, 8ul>> = {
                      buffer = "\020\066\256\000\000\000\000"}, <No data fields>}}, <No data fields>}, <No data fields>}, Storage = {InlineElts = {
---Type <return> to continue, or q <return> to quit---
                {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\020\274\301\000\000\000\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "`Dj\000\000\000\000"}, <No data fields>}, 
                {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\001\000\000\000\000\000\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "5!\260\364\377\177\000"}, <No data fields>}, 
                {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\202Dj\000\000\000\000"}, <No data fields>}, 
                {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\310\334\254\000\000\000\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\000x\241\000\000\000\000"}, <No data fields>}, 
                {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\001\000\000\000\000\000\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\300\363\255\000\000\000\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\024Y\213\364\377\177\000"}, <No data fields>}, 
                {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\001\000\000\000\000\000\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 8ul>> = {
---Type <return> to continue, or q <return> to quit---
                    buffer = "\000\340\377\377\377\177\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "x\273\301\000\000\000\000"}, <No data fields>}, 
                {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\250\370\022\365\377\177\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 8ul>> = {
                    buffer = "\000\270k\000\000\000\000"}, <No data fields>}}}}, 
          Pointers = {<llvm::SmallVectorImpl<llvm::PointerAlignElem>> = {<llvm::SmallVectorTemplateBase<llvm::PointerAlignElem, false>> = {<llvm::SmallVectorTemplateCommon<llvm::PointerAlignElem, void>> = {<llvm::SmallVectorBase> = {
                    BeginX = 0x7fffffffdf10, EndX = 0x7fffffffdf20, 
                    CapacityX = 0x7fffffffdf90}, 
                  FirstEl = {<llvm::AlignedCharArray<4ul, 16ul>> = {
                      buffer = "\004\000\000\000\004\000\000\000\004\000\000\000\000\000\000"}, <No data fields>}}, <No data fields>}, <No data fields>}, 
            Storage = {InlineElts = {{<llvm::AlignedCharArray<4ul, 16ul>> = {
                    buffer = "\270\273\301\000\000\000\000\000x\273\301\000\000\000\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 16ul>> = {
                    buffer = "\001\000\000\000\000\000\000\000\240\267k\000\000\000\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 16ul>> = {
                    buffer = "\240\337\377\377\377\177\000\000\025\000\000\000\000\000\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 16ul>> = {
---Type <return> to continue, or q <return> to quit---
                    buffer = "\300\273\301\000\000\000\000\000\336U\336\367\377\177\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 16ul>> = {
                    buffer = "\330\337\377\377\377\177\000\000\240\337\377\377\377\177\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 16ul>> = {
                    buffer = "(==\367\377\177\000\000\200\215=\367\377\177\000"}, <No data fields>}, {<llvm::AlignedCharArray<4ul, 16ul>> = {
                    buffer = "\003", '\000' <repeats 14 times>}, <No data fields>}}}}, static InvalidAlignmentElem = {AlignType = 0, TypeBitWidth = 0, 
            ABIAlign = 0, PrefAlign = 0}, static InvalidPointerElem = {
            ABIAlign = 0, PrefAlign = 0, TypeByteWidth = 0, 
            AddressSpace = 4294967295}, LayoutMap = 0x0}
        TargetTriple = {Data = "spir", Arch = llvm::Triple::spir, 
          SubArch = llvm::Triple::NoSubArch, 
          Vendor = llvm::Triple::UnknownVendor, OS = llvm::Triple::UnknownOS, 
          Environment = llvm::Triple::UnknownEnvironment, 
          ObjectFormat = llvm::Triple::ELF}
        libraryInfo = 0x6bf4a0
        passes = <incomplete type>
        iter = <optimized out>
#11 0x00007ffff3c36651 in gbe::Program::buildFromLLVMFile (
    this=this@entry=0x676ff0, fileName=fileName@entry=0x0, module=0xc1bbc0, 
    error="", optLevel=optLevel@entry=1)
    at /home/rnpalmer/Debian/builds/stackbuild/beignet/backend/src/backend/progr---Type <return> to continue, or q <return> to quit---
am.cpp:124
        unit = 0xadf690
        cloned_module = 0x695800
#12 0x00007ffff3d2cdbf in gbe::genProgramBuildFromLLVM (program=0x676ff0, 
    stringSize=1000, err=0x6dd9b0 "", errSize=0x69aa18, 
    options=<optimized out>)
    at /home/rnpalmer/Debian/builds/stackbuild/beignet/backend/src/backend/gen_program.cpp:443
        error = ""
        optLevel = 1
        p = 0x676ff0
        module = <optimized out>
#13 0x00007ffff778c0f1 in cl_program_link (context=<optimized out>, 
    num_input_programs=<optimized out>, input_programs=<optimized out>, 
    options=<optimized out>, errcode_ret=errcode_ret@entry=0x7fffffffe2ac)
    at /home/rnpalmer/Debian/builds/stackbuild/beignet/src/cl_program.c:679
        p = 0x69a990
        err = 0
        i = <optimized out>
        copyed = 0
        ret = 0
        avialable_program = 0
#14 0x00007ffff7783d20 in clLinkProgram (context=<optimized out>, 
---Type <return> to continue, or q <return> to quit---
    num_devices=<optimized out>, device_list=<optimized out>, 
    options=<optimized out>, num_input_programs=<optimized out>, 
    input_programs=<optimized out>, pfn_notify=0x0, user_data=0x0, 
    errcode_ret=0x0)
    at /home/rnpalmer/Debian/builds/stackbuild/beignet/src/cl_api.c:1022
        err = 0
        program = 0x0
#15 0x0000000000400fc1 in main (argc=1, argv=0x7fffffffe478)
    at opencl_test.c:46
        platform = 0x7ffff79d1380 <intel_platform_data>
        device = 0x7ffff79d45a0 <intel_ivb_gt2_device>
        status = 0
        ret = 2
        ctx = 0xa46ac0
        queue = 0x6d40c0
        program = 0x6b8390
        program2 = 0x100000000
        kernel = 0x4011ed <__libc_csu_init+77>
        buffer = 0x7ffff73e01a8
        kernel_finished = 0x7ffff7de9e17
        f = 0x6681e0
        n = 3
        test_data = "\003\a\005"
---Type <return> to continue, or q <return> to quit---
        kernel_source = 0x658f90 "#define ffwidth 16\n#define SETUP __private size_t i __attribute__((aligned)) = 0; \\\n  __private size_t j __attribute__((aligned)) = 0; \\\n\\\n  __private const size_t maxf __attribute__((aligned)) = ((1 "...
        build_log = 0x667de0 "stringInput.cl:11:11: warning: SKIP is not defined, will define it to 1. Tests may crash on large fields.\n"
(gdb) quit


1.1 without PrintfSlot fix:
(gdb) run
Starting program: /home/rnpalmer/Debian/builds/stackbuild/a.out
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Failed to release test userptr object! (9) i915 kernel driver may not be sane!
Failed to release test userptr object! (9) i915 kernel driver may not be sane!
Failed to release test userptr object! (9) i915 kernel driver may not be sane!
built 0 /tmp/UGeVwW.cl:11:11: warning: SKIP is not defined, will define it to 1. Tests may crash on large fields.

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff24fdcc5 in ?? () from /usr/lib/x86_64-linux-gnu/libLLVM-3.5.so.1
(gdb) bt full
#0  0x00007ffff24fdcc5 in ?? () from /usr/lib/x86_64-linux-gnu/libLLVM-3.5.so.1
No symbol table info available.
#1  0x00007ffff2699fb1 in llvm::BinaryOperator::BinaryOperator(llvm::Instruction::BinaryOps, llvm::Value*, llvm::Value*, llvm::Type*, llvm::Twine const&, llvm::Instruction*) () from /usr/lib/x86_64-linux-gnu/libLLVM-3.5.so.1
No symbol table info available.
#2  0x00007ffff269a0b7 in llvm::BinaryOperator::Create(llvm::Instruction::BinaryOps, llvm::Value*, llvm::Value*, llvm::Twine const&, llvm::Instruction*) ()
   from /usr/lib/x86_64-linux-gnu/libLLVM-3.5.so.1
No symbol table info available.
#3  0x00007ffff407bc7e in ?? ()
   from /usr/lib/x86_64-linux-gnu/beignet//libgbe.so
No symbol table info available.
#4  0x00007ffff407d46f in ?? ()
   from /usr/lib/x86_64-linux-gnu/beignet//libgbe.so
No symbol table info available.
#5  0x00007ffff26b06c7 in llvm::FPPassManager::runOnFunction(llvm::Function&)
    () from /usr/lib/x86_64-linux-gnu/libLLVM-3.5.so.1
No symbol table info available.
#6  0x00007ffff292a94e in ?? () from /usr/lib/x86_64-linux-gnu/libLLVM-3.5.so.1
No symbol table info available.
#7  0x00007ffff26b0354 in llvm::legacy::PassManagerImpl::run(llvm::Module&) ()
   from /usr/lib/x86_64-linux-gnu/libLLVM-3.5.so.1
---Type <return> to continue, or q <return> to quit---
No symbol table info available.
#8  0x00007ffff409fdc2 in ?? ()
   from /usr/lib/x86_64-linux-gnu/beignet//libgbe.so
No symbol table info available.
#9  0x00007ffff4025551 in ?? ()
   from /usr/lib/x86_64-linux-gnu/beignet//libgbe.so
No symbol table info available.
#10 0x00007ffff411b27f in ?? ()
   from /usr/lib/x86_64-linux-gnu/beignet//libgbe.so
No symbol table info available.
#11 0x00007ffff6db8097 in cl_program_link ()
   from /usr/lib/x86_64-linux-gnu/beignet//libcl.so
No symbol table info available.
#12 0x00007ffff6dafa5c in clLinkProgram ()
   from /usr/lib/x86_64-linux-gnu/beignet//libcl.so
No symbol table info available.
#13 0x0000000000400f51 in main (argc=1, argv=0x7fffffffe4a8)
    at opencl_test.c:36
        platform = 0x7ffff6ffd000
        device = 0x7ffff7000220
        status = 0
        ret = 2
        ctx = 0xaf8290
---Type <return> to continue, or q <return> to quit---
        queue = 0xa64240
        program = 0xb0b2e0
        program2 = 0x0
        kernel = 0x40117d <__libc_csu_init+77>
        buffer = 0x7ffff74321a8
        kernel_finished = 0x7ffff79d6a37
        f = 0x611290
        n = 3
        test_data = "\003\a\005"
        kernel_source = 0x602040 "#define ffwidth 16\n#define SETUP __private size_t i __attribute__((aligned)) = 0; \\\n  __private size_t j __attribute__((aligned)) = 0; \\\n\\\n  __private const size_t maxf __attribute__((aligned)) = ((1 "...
        build_log = 0x610e90 "/tmp/UGeVwW.cl:11:11: warning: SKIP is not defined, will define it to 1. Tests may crash on large fields.\n"
(gdb) quit

1.1 with PrintfSlot fix:
(gdb) run
Starting program: /home/rnpalmer/Debian/builds/stackbuild/a.out
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Failed to release test userptr object! (9) i915 kernel driver may not be sane!
Failed to release test userptr object! (9) i915 kernel driver may not be sane!
Failed to release test userptr object! (9) i915 kernel driver may not be sane!
built 0 /tmp/6BNhTJ.cl:11:11: warning: SKIP is not defined, will define it to 1. Tests may crash on large fields.

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff24fdcc5 in ?? () from /usr/lib/x86_64-linux-gnu/libLLVM-3.5.so.1
(gdb) bt full
#0  0x00007ffff24fdcc5 in ?? () from /usr/lib/x86_64-linux-gnu/libLLVM-3.5.so.1
No symbol table info available.
#1  0x00007ffff2699fb1 in llvm::BinaryOperator::BinaryOperator(llvm::Instruction::BinaryOps, llvm::Value*, llvm::Value*, llvm::Type*, llvm::Twine const&, llvm::Instruction*) () from /usr/lib/x86_64-linux-gnu/libLLVM-3.5.so.1
No symbol table info available.
#2  0x00007ffff269a0b7 in llvm::BinaryOperator::Create(llvm::Instruction::BinaryOps, llvm::Value*, llvm::Value*, llvm::Twine const&, llvm::Instruction*) ()
   from /usr/lib/x86_64-linux-gnu/libLLVM-3.5.so.1
No symbol table info available.
#3  0x00007ffff407caee in ?? ()
   from /usr/lib/x86_64-linux-gnu/beignet//libgbe.so
No symbol table info available.
#4  0x00007ffff407e2df in ?? ()
   from /usr/lib/x86_64-linux-gnu/beignet//libgbe.so
No symbol table info available.
#5  0x00007ffff26b06c7 in llvm::FPPassManager::runOnFunction(llvm::Function&)
    () from /usr/lib/x86_64-linux-gnu/libLLVM-3.5.so.1
No symbol table info available.
#6  0x00007ffff292a94e in ?? () from /usr/lib/x86_64-linux-gnu/libLLVM-3.5.so.1
No symbol table info available.
#7  0x00007ffff26b0354 in llvm::legacy::PassManagerImpl::run(llvm::Module&) ()
   from /usr/lib/x86_64-linux-gnu/libLLVM-3.5.so.1
---Type <return> to continue, or q <return> to quit---
No symbol table info available.
#8  0x00007ffff40a0aa2 in ?? ()
   from /usr/lib/x86_64-linux-gnu/beignet//libgbe.so
No symbol table info available.
#9  0x00007ffff4026391 in ?? ()
   from /usr/lib/x86_64-linux-gnu/beignet//libgbe.so
No symbol table info available.
#10 0x00007ffff411bf5f in ?? ()
   from /usr/lib/x86_64-linux-gnu/beignet//libgbe.so
No symbol table info available.
#11 0x00007ffff6db8097 in cl_program_link ()
   from /usr/lib/x86_64-linux-gnu/beignet//libcl.so
No symbol table info available.
#12 0x00007ffff6dafa5c in clLinkProgram ()
   from /usr/lib/x86_64-linux-gnu/beignet//libcl.so
No symbol table info available.
#13 0x0000000000400f51 in main (argc=1, argv=0x7fffffffe4a8)
    at opencl_test.c:36
        platform = 0x7ffff6ffd000
        device = 0x7ffff7000220
        status = 0
        ret = 2
        ctx = 0xaf8290
---Type <return> to continue, or q <return> to quit---q