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Re: GCC optimizes integer overflow: bug or feature?
Brooks Moses wrote:
Now, if your argument is that following the LIA-1 standard will prevent
optimizations that could otherwise be made if one followed only the C
standard, that's a reasonable argument, but it should not be couched as
if it implies that preventing the optimizations would not be following
the C standard.
I continue to suspect that the gains from this optimization are minimal
to non-existent in practice. Given the requirements in LIA-1, I would
think that taking advantage of overflow being undefined is only
acceptable if there is very clear quantitative data showing that this
indeed is a significant optimization.