topic Thanks, simply removing the in Software Archive

Internal Error: Bad Pointer

dnesteruk — Mon, 03 Mar 2014 20:47:52 GMT

I'm attempting to compile the attached file with icpc -mmic -openmp offload.cpp. Unfortunately, I get the following error:

offload.cpp(9): internal error: bad pointer
#pragma omp target map(inarray[0:SIZE]) map(sum)
^

Help much appreciated! FYI, I'm using 2013.4 toolset on Linux.

I reproduced the error with

Kevin_D_Intel — Mon, 03 Mar 2014 21:01:00 GMT

I reproduced the error with the earlier 2013.4 release you used and confirmed it is fixed in the latest Composer XE 2013 SP1 Update 2 release (See below).

$ icpc -V -mmic -openmp tt.cpp
Intel(R) C++ Intel(R) 64 Compiler XE for applications running on Intel(R) 64, Version 14.0.2.144 Build 20140120
Copyright (C) 1985-2014 Intel Corporation. All rights reserved.

tt.cpp(5): warning #3180: unrecognized OpenMP #pragma
#pragma omp declare target
^

tt.cpp(9): warning #3180: unrecognized OpenMP #pragma
#pragma omp target map(inarray[0:SIZE]) map(sum)
^

GNU ld (GNU Binutils) 2.22.52.20120302

The OpenMP 4.0 target directives are not intended for use with the -mmic option. You compile this program without that option.

$ icpc -V -openmp tt.cpp
Intel(R) C++ Intel(R) 64 Compiler XE for applications running on Intel(R) 64, Version 14.0.2.144 Build 20140120
Copyright (C) 1985-2014 Intel Corporation. All rights reserved.

GNU ld (GNU Binutils) 2.22.52.20120302

GNU ld version 2.20.51.0.2-5.36.el6 20100205

$ ./a.out
Reduced sum 499500, expected 499500

Thanks, simply removing the

dnesteruk — Mon, 03 Mar 2014 22:03:34 GMT

Thanks, simply removing the -mmic flag helped me compile and run the program.

Glad to hear that.

Kevin_D_Intel — Tue, 04 Mar 2014 09:43:11 GMT

Glad to hear that.

I perhaps should have been clearer in my earlier reply that while the OpenMP 4.0 target directives produce warnings when compiling with -mmic, those do not preclude building and running the small program natively on the coprocessor if desired. The target directives support offloading code to attached devices and thus are not applicable in native mode so those are ignored and produce the warnings shown; however, the code can still be compiled and run natively.