Excellent work Florian! Makes me want to work on those parts of the
compiler.. Though my current interests are in other parts of it.
But very nice. :)
On 14-01-25 04:55 PM, Florian Klämpfl wrote:
Am 25.01.2014 23:00, schrieb Sven Barth:
On 25.01.2014 17:09, Florian Klaempfl wrote:
Am 24.01.2014 09:32, schrieb Sven Barth:
Am 24.01.2014 02:03, schrieb Martin Frb:
There is a bigger example, where exactly that was done, because FPCs
optimization was not sufficient enough for what the author wanted.
http://bugs.freepascal.org/view.php?id=10275
In that context... @Florian: how is your SSA support coming along? :)
Still WIP :) But a lot of my commits from the last weeks are spin-offs
of the SSA work.
Together with all other improvements this results in significant better
code:
fpc -l -O3 sha256.pp -S2
Free Pascal Compiler version 2.6.2 [2013/02/12] for i386
Copyright (c) 1993-2012 by Florian Klaempfl and others
Target OS: Win32 for i386
Compiling sha256.pp
Linking sha256.exe
74 lines compiled, 0.1 sec , 26016 bytes code, 2220 bytes data
fptime sha256
Expected: 3994057095, got 3994057095
483.000 ms
pp -n @c:\fpc\bin\fpc.cfg -l -O4 sha256.pp -S2
Free Pascal Compiler version 2.7.1 [2014/01/25] for i386
Copyright (c) 1993-2013 by Florian Klaempfl and others
fptime sha256
Expected: 3994057095, got 3994057095
367.000 ms
Nice :D
Still looking forward to more improvements regarding SSA ^^
Most could be probably gained in this example by moving variables into
xmm registers if only certain kind of operations are carried out on them.
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