Re: [Qemu-devel] [PATCH] cpu-exec: Fix compiler warning (-Werror=clobbered)

[Jan Kiszka <jan.kiszka@web.de>]

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On 2013-10-28 20:18, Stefan Weil wrote:
> Am 18.09.2013 09:48, schrieb Jan Kiszka:
>> On 2013-09-18 09:26, Peter Maydell wrote:
> [...]
>>> And gcc's documentation of the 'noreturn' attribute specifically
>>> says it does not affect the exceptional path where the function
>>> returns via longjmp.
>> OK, that is the clarifying bit of information.
>>
>> Now the question is if want to drop support for faulty compilers again,
>> work around the false-positive warning, or avoid the issue differently
>> than via reloading.
>>
>> Jan
> 
> Recently commit 6c78f29a2424622bfc9c30dfbbc13404481eacb6
> added a third variable which is reloaded now. Obviously the clang
> compiler needs this workaround.
> 
> Jan, can you remember whether the initial problems were also
> caused by clang? If yes, we might restrict the code to that compiler.
> This would avoid the -Wclobbered warnings with newer gcc while
> still fixing the code generated by clang.

Look up this thread: gcc 4.5.0

Jan



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