[Bug target/98482] -mfentry creates invalid call for -mcmodel=large

["crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98482

--- Comment #7 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to H.J. Lu from comment #6)
> A patch is posted at
> 
> https://gcc.gnu.org/pipermail/gcc-patches/2021-January/563033.html

Yes, %r10 is pushed before __fentry__

cat test.c

void func(int (*param)(int));

void outer(int x)
{
    int nested(int y)
    {
        // If x is not used somewhere in here,
        // then the function will be "lifted" into
        // a normal, non-nested function.
        return x + y;
    }
    func(nested);
}

with -O2 -pg -mfentry got

nested.0:
.LFB1:
        .cfi_startproc
        pushq   %r10
1:      call    __fentry__
        popq    %r10
        movl    (%r10), %eax
        addl    %edi, %eax
        ret
        .cfi_endproc
.LFE1:
        .size   nested.0, .-nested.0
        .p2align 4
        .globl  outer
        .type   outer, @function
outer:
.LFB0:
        .cfi_startproc
1:      call    __fentry__
        subq    $56, %rsp
        .cfi_def_cfa_offset 64
        leaq    64(%rsp), %rax
        movq    %rax, 32(%rsp)
        movl    $-17599, %eax
        movl    %edi, (%rsp)
        movw    %ax, 4(%rsp)
        movl    $-17847, %edx
        movl    $nested.0, %eax
        leaq    4(%rsp), %rdi
        movl    %eax, 6(%rsp)
        movw    %dx, 10(%rsp)
        movq    %rsp, 12(%rsp)
        movl    $-1864106167, 20(%rsp)
        call    func
        addq    $56, %rsp
        .cfi_def_cfa_offset 8