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Altera_Forum's avatar
Altera_Forum
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7 years ago

OpenCL compiler crashed when compile some piece of simple code

Hi there, I got some trouble when I was trying to compile some complex OpenCL program with Intel FPGA OpenCL Offline Compiler.

then compiler crashed, so I try to remove some code to examine this problem, finally I got a piece of simple test code which could result in crash of compiler: 

void testB(ulong8 p, ulong8 h, ulong h8, const ulong* restrict t)
{
    ulong4 p1;
    ulong8 p2;
    
    p1 = shuffle((ulong4)h8, (ulong4)44);
    p2 = shuffle2(p, h, (ulong8)55);
}
__kernel void testA(__global uint8* p)
{
    ulong ta={0};
    testB(1,2,3,ta);
}

it looks like the opencl builtin functions like shuffle and shuffle2 caused the crash

The command line that I used to compile is: 

aoc -v -g --report skein.cl

The compiler version is: 


Intel(R) FPGA SDK for OpenCL(TM), 64-Bit Offline Compiler
Version 17.0.0 Build 290
Copyright (C) 2017 Intel Corporation

the compile log will be posted with attachment.

Is there anyone got same problem as me ?

thanks for your time.

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    7 years ago

    There are hundreds of bugs in Altera's compiler that could lead to such crashes. Your code snippet crashes the compiler all the way to the recent v18.0. In such cases, the only choices are to either change the design strategy to bypass the crash, or report it to Altera and then wait multiple months until they release a new version which might include a fix.

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    7 years ago

    --- Quote Start ---

    There are hundreds of bugs in Altera's compiler that could lead to such crashes. Your code snippet crashes the compiler all the way to the recent v18.0. In such cases, the only choices are to either change the design strategy to bypass the crash, or report it to Altera and then wait multiple months until they release a new version which might include a fix.

    --- Quote End ---

    that's a bad news, it's hard to say the Altera's OpenCL toolchain is good enough to develop some kind of industrial-grade product. I think I should give up and looking for some alternative solutions