[Bug target/68661] New: __attribute__ ((no_caller_saved_registers)) trashes stack

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68661

            Bug ID: 68661
           Summary: __attribute__ ((no_caller_saved_registers)) trashes
                    stack
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: vaalfreja at gmail dot com
  Target Milestone: ---

[hjl@gnu-6 no-caller-saved-2]$ cat x.i 
extern void bar0 (int, int) __attribute__ ((no_caller_saved_registers));

void
foo (void)
{
  bar0 (1, 2);
}
[hjl@gnu-6 no-caller-saved-2]$ cat main.i
void 
__attribute__ ((no_caller_saved_registers))
bar0 (int i, int j)
{
  if (i != 1)
    __builtin_abort ();

  if (j != 2)
    __builtin_abort ();
}

extern void foo (void);

int
main ()
{
  foo ();
  return 0;
}
[hjl@gnu-6 no-caller-saved-2]$ make
/export/build/gnu/gcc-x32/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc-x32/build-x86_64-linux/gcc/ -Og -g -m32 -S -o x.s x.i
/export/build/gnu/gcc-x32/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc-x32/build-x86_64-linux/gcc/ -Og -g -m32 -S -o main.s
main.i
/export/build/gnu/gcc-x32/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc-x32/build-x86_64-linux/gcc/ -Og -g -m32 -o x x.s main.s
./x
Makefile:12: recipe for target 'all' failed
make: *** [all] Aborted
[hjl@gnu-6 no-caller-saved-2]$