https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53929
tk <u1049321969 at caramail dot com> changed:
What |Removed |Added
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CC| |u1049321969 at caramail dot com
--- Comment #1 from tk <u1049321969 at caramail dot com> ---
Hello all,
I would like to report that I hit upon a related issue in GCC 10.0.1. Besides
complaining on "and", the assembly pass also complains if I use a symbol which
happens to be the same as register name, e.g. "bx".
$ gcc-10 --version
gcc-10 (Ubuntu 10-20200411-0ubuntu1) 10.0.1 20200411 (experimental) [master
revision bb87d5cc77d:75961caccb7:f883c46b4877f637e0fa5025b4d6b5c9040ec566]
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ cat test.c
int bx[16];
int f(unsigned x)
{
return bx[x];
}
$ gcc-10 -c test.c -O3 -masm=intel
/tmp/ccGtGi2X.s: Assembler messages:
/tmp/ccGtGi2X.s:12: Error: invalid use of register
The offending line in the assembly code says
lea rax, bx[rip]
The problem does _not_ go away even if I quote the symbol name by hand in the
assembly output, e.g.
lea rax, "bx"[rip]
Thank you!
