File:  [NetBSD Developer Wiki] / wikisrc / users / maya / vax-gcc.mdwn
Revision 1.2: download - view: text, annotated - select for diffs
Thu Aug 29 12:46:29 2019 UTC (5 months, 3 weeks ago) by maya
Branches: MAIN
CVS tags: HEAD
More info on some crash, more attempts to markdown

# Various GCC/vax issues and invesigation #

# libgomp crash with -O2 #
Repro:

    #!/bin/sh
    
    cat << EOF > oacc.i
    int a, b;
    int e() {
      short *c = 0;
      char d = c[a + 1];
      b = d;
      a += 2;
    }
    EOF
    vax--netbsdelf-gcc -O2 -c oacc.i

Asserts at emit-rtl.c:2310 gcc_assert (memory_address_addr_space_p (mode, addr, as));

NetBSD avoids it with a local diff to reload.c/dse.c.

It looks like a real bug in vax_legitimate_address_p not handling some addressing modes.

The code to handle offset(reg)[index] might be off: it doesn't like if neither xfoo0, xfoo1 are constant.

CVSweb for NetBSD wikisrc <wikimaster@NetBSD.org> software: FreeBSD-CVSweb