Firm: a C library with graph-based IR suitable for compilers

Re:Firm: a C library with graph-based IR suitable for compilers by lindig on Monday January 18, 2016 @11:48AM (#10925370)

The following code crashes the compiler but is accepted by GCC.

    static float b5[0][0] = {};
    int main(void)
    {
        return 0;
    }

I have filed a bug report.

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Re:Firm: a C library with graph-based IR suitable for compilers by PeCaN on Monday January 18, 2016 @12:00PM (#10925425)

0-length arrays are a GNU C extension[1].

In ISO C99, they're only permitted as the last member of a struct with another member, and are written with an empty pair of brackets[] and no 0.

1. https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html

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Re:Firm: a C library with graph-based IR suitable for compilers by lindig on Monday January 18, 2016 @12:09PM (#10925467)

The compiler is described on its home page as "accompanying GCC-compatible C frontend." So what does this mean with respect to GCC features? In any case, I don't think the compiler should crash but report a syntax error.

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Re:Firm: a C library with graph-based IR suitable for compilers by Rotluchs on Monday January 18, 2016 @01:02PM (#10925778)

It's sufficiently compatible to handle e.g. glibc, which is quite a feat, because it uses many and somewhat obscure gcc extensions.

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Re:Firm: a C library with graph-based IR suitable for compilers by qznc on Monday January 18, 2016 @01:00PM (#10925762)

Thanks for the bug report! :)

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Re:Firm: a C library with graph-based IR suitable for compilers by Rotluchs on Monday January 18, 2016 @04:14PM (#10927000)

Fixed, thanks for the report. (: (stupid gcc extensions sigh)

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Re:Firm: a C library with graph-based IR suitable for compilers by jevinskie on Monday January 18, 2016 @11:29PM (#10928875)

Howdy! Very interesting project, coming from an avid LLVM user. Do you or your organization have a Twitter/FB/social page and/or GitHub page?

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Re:Firm: a C library with graph-based IR suitable for compilers by Rotluchs on Tuesday January 19, 2016 @02:08AM (#10929237)

We have an IRC channel (#firm on FreeNode), a mailing list (see libfirm.org) and there are github mirrors for cparser (https://github.com/MatzeB/cparser) and libfirm (https://github.com/MatzeB/libfirm/). If you want to report a bug, there's our bugtracker (also linked on libfirm.org)

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