[Bug inline-asm/55744] Use of ebx as output register in inline asm on x86_64 PIC mcmodel=medium

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55744

Eric Gallager <egallager at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2017-07-28
                 CC|                            |egallager at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Results from testing on i386-apple-darwin9.8.0 with gcc8:

$ /usr/local/bin/gcc -c -fPIC -mcmodel=medium 55744.c
cc1: error: code model ‘medium’ not supported in the 32 bit mode
$ /usr/local/bin/gcc -c -fPIC -mcmodel=medium -m64 55744.c
$ /usr/local/bin/gcc -o 55744.exe -fPIC -mcmodel=medium -m64 -Wall -Wextra
55744.c
Undefined symbols:
  "_GLOBAL_OFFSET_TABLE_", referenced from:
      _main in ccbh4pRB.o
ld: symbol(s) not found
collect2: error: ld returned 1 exit status
$ /usr/local/bin/gcc -o 55744.exe -fPIC -mcmodel=large -m64 -Wall -Wextra
55744.c
:14:junk `@GOTOFF' after expression
:18:junk `@PLTOFF' after expression
$ /usr/local/bin/gcc -o 55744.exe -fPIC -mcmodel=small -m64 -Wall -Wextra
55744.c
$ ./55744.exe
Result: 42
$ 

Which is probably bug 63893 and bug 50077 in my case. Can you try again with
your own target and see if it still fails in your case?