On Wed, Sep 24, 2014 at 7:46 AM, Jan Hubicka hubi...@ucw.cz wrote:
Hi,
This patch is something I was playing around with assistance of Ian Taylor.
It seems I need bit more help though :)
It adds support for direct output of SLIM LTO files to the compiler binary.
It works as proof of
Richard Biener richard.guent...@gmail.com writes:
Btw, the patch is very hard to read as it moves (and modifies?) files
at the same time. What's this magic file attributes we need?
The file attributes issue is the ELF machine number, class, OSABI,
flags, and endianness. When generating an
On Wed, Sep 24, 2014 at 2:40 PM, Ian Lance Taylor i...@airs.com wrote:
Richard Biener richard.guent...@gmail.com writes:
Btw, the patch is very hard to read as it moves (and modifies?) files
at the same time. What's this magic file attributes we need?
The file attributes issue is the ELF
Shouldn't -fbypass-asm be simply mangled by the driver? That is,
the user simply specifies -fbypass-asm and via spec magic the driver
substitutes this with -fbypass-asm=crtbegin.o? That way at least
the user interface should be stable (as we're supposedly removing
the requirement for that
Jan Hubicka hubi...@ucw.cz writes:
Nice patch.
The implementation is pretty straighforward except for -fbypass-asm requiring
one existing OBJ file to fetch target's file attributes from. This is
definitly not optimal, but libiberty currently can't build output files from
scratch. As Ian
On Wed, Sep 24, 2014 at 7:47 AM, Andi Kleen a...@firstfloor.org wrote:
I wonder how hard it would be to fix simple-object to be able to create
from scratch. From a quick look it would be mostly adding the right
values into the header? That would need some defines per target.
It could be done,
On Wed, Sep 24, 2014 at 7:47 AM, Andi Kleen a...@firstfloor.org wrote:
I wonder how hard it would be to fix simple-object to be able to create
from scratch. From a quick look it would be mostly adding the right
values into the header? That would need some defines per target.
It could
On Wed, Sep 24, 2014 at 7:47 AM, Andi Kleen a...@firstfloor.org wrote:
I wonder how hard it would be to fix simple-object to be able to create
from scratch. From a quick look it would be mostly adding the right
values into the header? That would need some defines per target.
It
On Wed, Sep 24, 2014 at 6:32 PM, Jan Hubicka hubi...@ucw.cz wrote:
Libreoffice shows that GCC needs about twice as much of system time. According
to profiles, good part is the ugly way we pass stuff down to assembler and
other part is memory use during the copmilation stage.
Are you using
On Wed, Sep 24, 2014 at 6:32 PM, Jan Hubicka hubi...@ucw.cz wrote:
Libreoffice shows that GCC needs about twice as much of system time.
According
to profiles, good part is the ugly way we pass stuff down to assembler and
other part is memory use during the copmilation stage.
Are you
On Wed, Sep 24, 2014 at 10:04 AM, Steven Bosscher stevenb@gmail.com wrote:
On Wed, Sep 24, 2014 at 6:32 PM, Jan Hubicka hubi...@ucw.cz wrote:
Libreoffice shows that GCC needs about twice as much of system time.
According
to profiles, good part is the ugly way we pass stuff down to
On Wed, Sep 24, 2014 at 10:04 AM, Steven Bosscher stevenb@gmail.com
wrote:
On Wed, Sep 24, 2014 at 6:32 PM, Jan Hubicka hubi...@ucw.cz wrote:
Libreoffice shows that GCC needs about twice as much of system time.
According
to profiles, good part is the ugly way we pass stuff down to
On Wed, Sep 24, 2014 at 11:47 PM, Ian Lance Taylor wrote:
On Wed, Sep 24, 2014 at 10:04 AM, Steven Bosscher wrote:
Are you using -pipe? AFAIR this still isn't the default, even on
GNU/Linux, but it is typically a lot faster than without.
Is that true even when TMPDIR is on a ram disk?
On Wed, Sep 24, 2014 at 11:47 PM, Ian Lance Taylor wrote:
On Wed, Sep 24, 2014 at 10:04 AM, Steven Bosscher wrote:
Are you using -pipe? AFAIR this still isn't the default, even on
GNU/Linux, but it is typically a lot faster than without.
Is that true even when TMPDIR is on a ram disk?
On Thu, Sep 25, 2014 at 12:47 AM, Ian Lance Taylor i...@google.com wrote:
Is that true even when TMPDIR is on a ram disk? There's no obvious
reason that it should be true in a parallel build. Using -pipe
effectively constrains communication between the compiler and the
assembler to work in
Hi,
This patch is something I was playing around with assistance of Ian Taylor.
It seems I need bit more help though :)
It adds support for direct output of SLIM LTO files to the compiler binary.
It works as proof of concept, but there are two key parts missing
1) extension of libiberty's
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