[Bug rtl-optimization/104236] asm statements containing %= assembler templates getting merged

[ndesaulniers at google dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104236

--- Comment #3 from Nick Desaulniers <ndesaulniers at google dot com> ---
Thanks for the feedback. I guess I was expecting these two to be somewhat
equivalent:

void x (int a) {
    if (a)
        asm("# %0"::"i"(__COUNTER__));
    else
        asm("# %0"::"i"(__COUNTER__));
}

void y (int a) {
    if (a)
        asm("# %=");
    else
        asm("# %=");
}

as was attempted in kernel commit

commit 3d1e236022cc ("objtool: Prevent GCC from merging
annotate_unreachable()")