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x86callingconv
2016 May 12
3
Why LR is saved before calling a 'noreturn' function ?
Dear all,
I don't get how llvm handles functions with __attribute__((noreturn)).
It seems that LR register is backed up on the stack whilst it will never be used to return from a 'noreturn' function.
I have this problem with a home-made backend but it seems that ARM flavour of clang has same behaviour.
By the way, SP is also saved, I don't understand why.
Is there a syntax error