[Bug rtl-optimization/82602] IRA considers volatile asm to be moveable

[ryxi at stu dot xidian.edu.cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82602

Xi Ruoyao <ryxi at stu dot xidian.edu.cn> changed:

           What    |Removed                     |Added
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                 CC|                            |ryxi at stu dot xidian.edu.cn

--- Comment #3 from Xi Ruoyao <ryxi at stu dot xidian.edu.cn> ---
I'm still not convinced this is a bug.  For example, all kernel code
uses `asm volatile ("" ::: "memory")` as barrier to stop GCC to reorder code
through it, not `asm volatile ("" :::)`.  So the developers have been aware
a "asm volatile" does NOT mean a barrier. If we change this behaviour and
stop reordering through all "asm volatile"s, the generated code could be
slower.