On Tue, Dec 17, 2013 at 08:45:13AM +0400, Konstantin Serebryany wrote:
> Indeed, the compile time is dominated by asan_interceptors.cc:
> % touch ~/llvm/projects/compiler-rt/lib/asan/asan_interceptors.cc
> % date; ninja libclang_rt.asan-x86_64.a libclang_rt.asan-i386.a ; date
> Tue Dec 17 08:39:38 MSK 2013
> [4/4] Linking CXX static library
> lib/clang/3.5/lib/linux/libclang_rt.asan-i386.a
> Tue Dec 17 08:39:42 MSK 2013
>
> But I think that 4 seconds for one file (+link time) is reasonable enough.
I bet this is just a combination of slow CPU, non release compiler (i.e. not
--enable-checking=release, with lots of extra asserts) and building 4 copies
of it rather than 1 (or 2?) - -fPIC/non-pic times {x86_64,i686}.
Anyway, if I look at -ftime-report, there is nothing obviously too slow,
var-tracking is the worst with taking ~ 18% of wall time, RTL sharing
verification 4%, tree verifiers 4%+7%, RA 5%, RTL PRE 4%, parser, GC, cfg
verifier, df
live, tree PRE each about 3%.
Jakub
