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llvm with tablegen backend for capstone disassembler
5543fbc9b2
architecture string is something quite weird. Similarly delay calling the BPF parsing code, although that is more reasonable. To understand why I was motivated to make this change, it cuts the time for running the ADT TripleTest unittests by a factor of two in non-optimized builds (the developer default) and reduces my 'check-llvm' time by a full 15 seconds. The implementation of parseARMArch is *that* slow. I tried to fix it in the prior series of commits, but frankly, I have no idea how to finish fixing it. The entire premise of the function (to allow 'v7a-unknown-linux' or some such to parse as an 'arm-unknown-linux' triple) seems completely insane to me, but I'll let the ARM folks sort that out. At least it is now out of the critical path of every developer working on LLVM. It also will likely make some other folks' code significantly faster as I've heard reports of 2% of time spent in triple parsing even in optimized builds! I'm not done making this code faster, but I am done trying to improve the ARM target parsing code. llvm-svn: 246378 |
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