Hi, I would like to know what is the official stand of GCC on optimization of atomic builtins? More precisely, optimization of redundant memory fences.
I am aware that Clang does some peephole optimization on redundant
fences, but this seem to be limited to a single basic block and does not
recognize lock-prefixed instructions as implicit memory fences on x86.
Thanks,
Olivier
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Olivier Dion
EfficiOS Inc.
https://www.efficios.com
