<s>
The	O
AMD	B-Application
Optimizing	I-Application
C/C	I-Application
++	I-Application
Compiler	I-Application
(	O
AOCC	O
)	O
is	O
an	O
optimizing	O
compiler	B-Language
from	O
AMD	O
targeting	O
32-bit	O
and	O
64-bit	O
Linux	B-Application
platforms	O
.	O
</s>
<s>
It	O
is	O
a	O
proprietary	O
fork	O
of	O
LLVM	B-Application
+	O
Clang	B-Application
with	O
various	O
additional	O
patches	O
to	O
improve	O
performance	O
for	O
AMD	O
's	O
Zen	O
microarchitecture	O
in	O
Epyc	O
and	O
Ryzen	O
microprocessors	O
.	O
</s>
<s>
+AOCC	O
version	O
history	O
AOCC	O
version	O
Date	O
LLVM	B-Application
version	O
Notes	O
1.0.0	O
May	O
2017	O
6.0	O
Uses	O
DragonEgg	O
with	O
GCC	B-Application
4.8.2	I-Application
for	O
Fortran	O
.	O
</s>
<s>
In	O
a	O
May	O
2017	O
benchmark	O
comparing	O
AOCC	O
v1.0	O
to	O
Clang	B-Application
4	O
and	O
5	O
,	O
and	O
GCC	B-Application
6	O
through	O
8	O
,	O
Phoronix	O
found	O
AOCC	O
provided	O
marginal	O
improvement	O
over	O
Clang	B-Application
4.0	O
in	O
several	O
benchmarks	O
and	O
no	O
difference	O
in	O
others	O
.	O
</s>
<s>
Compilation	B-Language
time	O
generally	O
increased	O
relative	O
to	O
Clang	B-Application
4.0	O
.	O
</s>
<s>
Some	O
benchmarks	O
found	O
some	O
versions	O
of	O
GCC	B-Application
had	O
better	O
performance	O
than	O
some	O
versions	O
of	O
Clang	B-Application
(	O
AOCC	O
included	O
)	O
,	O
and	O
vice	O
versa	O
.	O
</s>
<s>
In	O
August	O
2019	O
Phoronix	O
again	O
benchmarked	O
AOCC	O
,	O
now	O
AOCC	O
2.0	O
against	O
Clang	B-Application
9	O
and	O
GCC	B-Application
9.1	O
and	O
10.0	O
.	O
</s>
<s>
Along	O
with	O
the	O
compiler	B-Language
,	O
AMD	O
offers	O
the	O
,	O
a	O
set	O
of	O
numerical	O
libraries	O
that	O
is	O
roughly	O
similar	O
to	O
Intel	B-Language
's	I-Language
Math	I-Language
Kernel	I-Language
Library	I-Language
and	O
includes	O
AMD	O
Math	O
Library	O
(	O
LibM	O
)	O
,	O
AMD	O
Random	O
Number	O
Generator	O
Library	O
,	O
AMD	O
Secure	O
RNG	O
Library	O
,	O
AOCL-Sparse	O
,	O
BLIS	O
,	O
FFTW	B-Application
,	O
libFLAME	O
,	O
and	O
ScaLAPACK	B-Application
that	O
are	O
tuned	O
for	O
the	O
Zen	O
processors	O
.	O
</s>
<s>
AMD	O
also	O
offers	O
,	O
a	O
performance	O
analysis	O
tool	O
similar	O
to	O
Intel	B-Application
VTune	I-Application
.	O
</s>
