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Re: RFC: Improving GCC8 default option settings
On 12/09/17 16:57, Wilco Dijkstra wrote:
[...] As a result users are
required to enable several additional optimizations by hand to get good code.
Other compilers enable more optimizations at -O2 (loop unrolling in LLVM was
mentioned repeatedly) which GCC could/should do as well.
I'd welcome discussion and other proposals for similar improvements.
What's the status of graphite? It's been around for years. Isn't it
mature enough to enable these:
-floop-interchange -ftree-loop-distribution -floop-strip-mine -floop-block
by default for -O2? (And I'm not even sure those are the complete set of
graphite optimization flags, or just the "useful" ones.)