[Bug middle-end/71927] stack alignment prologue not optimized out when no local variables remain

[mirq-gccboogs at rere dot qmqm.pl]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71927

Micha³ Miros³aw <mirq-gccboogs at rere dot qmqm.pl> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #38926|0                           |1
        is obsolete|                            |

--- Comment #3 from Micha³ Miros³aw <mirq-gccboogs at rere dot qmqm.pl> ---
Created attachment 38927
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38927&action=edit
test case

It seems that just the asm and array length > 2 are needed.

$ gcc -O3 -S -o - c.c
[...]
x:
.LFB0:
        .cfi_startproc
        ret
        .cfi_endproc
[...]
y:
.LFB1:
        .cfi_startproc
        leaq    8(%rsp), %r10
        .cfi_def_cfa 10, 0
        andq    $-32, %rsp
        pushq   -8(%r10)
        pushq   %rbp
        .cfi_escape 0x10,0x6,0x2,0x76,0
        movq    %rsp, %rbp
        pushq   %r10
        .cfi_escape 0xf,0x3,0x76,0x78,0x6
        popq    %r10
        .cfi_def_cfa 10, 0
        popq    %rbp
        leaq    -8(%r10), %rsp
        .cfi_def_cfa 7, 8
        ret
        .cfi_endproc