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On Wednesday 05 May 2004 20:41, Richard Guenther wrote:
Using the suggested -fno-gcse -fno-cse-follow-jumps -fno-cse-skip-blocks -fno-web, -O2 compilation times improve about 8%. This leaves us with
Why not -fno-delete-null-pointer-checks? And -fweb is enabled on mainline and helps tree-ssa iirc, so that should really stay enabled...
10% to improve elsewhere (I guess, f.i. preserving the CFG could help, as well as removing some first invocations of CSE).
As well as disabling some stuff hidden behind -fexpensive-optimizations, and investigating if we really need to call delete_trivially_dead_insns so many times (and iteratively, see cfgcleanup!). And some other stuff like addressof, as discussed here some time ago. There are still a lot of things we have to try...
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