The goal of these runs is to compare the performance of the latest
versions of LLVM and GCC on ARM. I used similar
options -Ofast for both compilers.
As usually LLVM can not produce a correct code for 254.gap on any
optimization level. Therefore -O0 was used instead
of -Ofast for both LLVM and GCC compilers for 254.gap.
I did not manage LLVM-3.4 to work with LTO as GOLD have a crash
in arm.cc file (GOLD is needed for LLVM if you want to use LTO).
The used processor is Exynos 5410 (1.6GHz Cortex-A15) with 2GB
memory under Fedora Core19.
GCC-4.9 was configured with
--with-fpu=vfpv3-d16 --with-float=hard. LLVM-3.4 with CLANG
for ARM were built in release mode with--enable-optimized
--with-arch=armv7-a --with-fpu=vfpv3-d16 --with-float=hard.
The sources are taken from
LLVM download site.
All changes are given relative to LLVM-3.4 run.
Last modified: 06/23/2014 - vmakarov at redhat dot com
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