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380 Commits
Author SHA1 Message Date
Paulo Matos eb76dbdf4d x87 small cleanups; NFC 2024-10-02 18:27:51 +02:00
Ryan Houdek 36e4f9a070 Merge pull request #4049 from alyssarosenzweig/opt/constprop-merges 
ConstProp: speed it up
 2024-09-08 10:13:23 -07:00
Alyssa Rosenzweig 39cc1e5116 ConstProp: merge folding+inlining 
2% off nodejs

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-08 10:26:58 -04:00
Alyssa Rosenzweig f46856c090 ConstProp: template constant inlining 
DRY

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-08 10:26:58 -04:00
Alyssa Rosenzweig b7859052da ConstProp: don't mask shifts 
done in the emitter now

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-08 10:26:58 -04:00
Alyssa Rosenzweig 3b30d8103f ConstProp: combine like cases 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-08 10:26:58 -04:00
Alyssa Rosenzweig d19fc36f8f ConstProp: delay constant pooling 
more efficient to pool the output of constant folding and such. but we need to
avoid that becoming accidentally quadratic, so rework that too

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-08 10:26:58 -04:00
Alyssa Rosenzweig 384882744c DeadStoreElimination: drop now that it's redundant 
it's only really load bearing for pf/af, which is handled as a global flag opt
now. this mitigates some of the compile time hit from globalizing flag opts.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-07 10:59:05 -04:00
Alyssa Rosenzweig b36d1f7e7b RedundantFlagCalculationElimination: optimize parity 
another global CFG-based optimization -- if we know that the raw PF is already
1-bit we can skip parity evaluation, saving work with floating point compares.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-07 10:59:05 -04:00
Alyssa Rosenzweig dd7c66db2e RedundantFlagCalculationElimination: use LUT for flags 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-07 10:59:05 -04:00
Alyssa Rosenzweig 47ac9edd7a RedundantFlagCalculationElimination: select testz 
this saves uops.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-07 10:59:05 -04:00
Alyssa Rosenzweig 6e6d640fec RedundantFlagCalculationElimination: fold compares/axflag into branches 
now that we know whether flags are killed on the edge, we can improve branch
isel

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-07 10:59:05 -04:00
Alyssa Rosenzweig eb88366614 RedundantFlagCalculationElimination: globalize 
Gather a control flow graph and use it to propagate flags throughout the
program.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-07 10:59:05 -04:00
Alyssa Rosenzweig 50d6ddd591 RedundantFlagCalculationElimination: extract per-block logic 
nfc

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-07 10:59:05 -04:00
Alyssa Rosenzweig 249de7c758 RedundantFlagCalculationElimination: drop unneeded bools 
nonzero <==> not dummy

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-07 10:59:05 -04:00
Alyssa Rosenzweig c350888d70 RedundantFlagCalculationElimination: add missing adczero case 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-07 10:59:05 -04:00
Alyssa Rosenzweig f23bef1653 RedundantFlagCalculationElimination: add missing testnz case 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-07 10:59:05 -04:00
Alyssa Rosenzweig 50a3ca0d6d IR: introduce dedicated PF/AF instructions 
this makes reasoning about them a little easier, e.g. for flags.  about 1% win
in nodejs.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-07 10:59:05 -04:00
Alyssa Rosenzweig 8745455a5b IR: track whether parity is read 
so we can gate optimizations efficiently

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-07 08:26:04 -04:00
Alyssa Rosenzweig e9ab514962 IR: push parity evaluation down 
so we can optimize it globally

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-07 08:26:04 -04:00
Alyssa Rosenzweig 4eb0948451 IR: push down AXFLAG lowering 
so we can get the new axflag optimizations on billy's x13s.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-07 08:26:04 -04:00
Alyssa Rosenzweig 8d9f19bd73 IR: add TestZ op 
more optimized than TestNZ if we don't care about the sign bit.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-07 08:26:04 -04:00
Ryan Houdek ca2fe0b301 AOTIR: Move debugdata structure to internal header 
This definition doesn't need to be exposed in the public API.
 2024-09-06 10:19:45 -07:00
Ryan Houdek 5013b8a0db Merge pull request #4036 from alyssarosenzweig/opt/dont-inline-pool 
ConstProp: stop pooling inline constants
 2024-09-05 07:30:39 -07:00
Alyssa Rosenzweig ac65deed6c ConstProp: drop CreateInlineConstant 
bit of cleanup

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-05 09:48:59 -04:00
Alyssa Rosenzweig d1d4d2d876 ConstProp: stop pooling inline constants 
Because we already pooled the _Constants, there's no benefit to also pooling inline constants. the robin map to do so just adds extra overhead for no benefit - drop it.

without multiblock, shaves around 2% off node. with multiblock, a bit less than
1% but still a win.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-05 09:47:35 -04:00
Alyssa Rosenzweig 6d4693cbc1 IR: fix scalar FMA tied sources 
needs to be modelled explicitly or else we lose information when translating

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-09-04 07:42:44 -04:00
Alyssa Rosenzweig 03832b2523 Merge pull request #4012 from alyssarosenzweig/opt/pf-af-kill 
DeadStoreElimination: handle PF/AF invalidate
 2024-08-27 08:01:54 -04:00
Alyssa Rosenzweig faf1b85904 DeadStoreElimination: handle PF/AF invalidate 
lets us kill some AF calculations with multiblock.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-26 11:28:16 -04:00
Billy Laws bec5f4fe2a DeadStoreElimination: Fix uint64 typing for register bitmask 
unsigned longs are 32 bits wide on Windows.
 2024-08-26 13:12:58 +00:00
Alyssa Rosenzweig ce8e6e5c0c OpcodeDispatcher: optimize adc 0 
clang generates this.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-22 10:51:06 -04:00
Alyssa Rosenzweig d53e689e22 IR: model tbz/tbnz 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-21 17:52:22 -04:00
Alyssa Rosenzweig d0e040514f IR: add LoadContextPair 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-20 18:31:19 -04:00
Alyssa Rosenzweig 850c027d52 IR: add AllocateFPR 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-20 18:31:19 -04:00
Alyssa Rosenzweig 5df90563e2 IR: add LoadMemPair 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-20 18:31:19 -04:00
Alyssa Rosenzweig 7a489d18c6 IR: add StoreMemPair 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-20 18:31:19 -04:00
Alyssa Rosenzweig 1db092e96f IR: add StoreContextPair 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-20 18:31:19 -04:00
Alyssa Rosenzweig 7de6a5cb07 OpcodeDispatcher: optimize rotate flags 
introduce an IR op for it so we can reason about flags across rotate
instructions easily.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-19 10:40:53 -04:00
Alyssa Rosenzweig e06b3a4186 ConstProp: optimize and x, -1 
mitigates regression from previous patch

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-19 08:54:47 -04:00
Alyssa Rosenzweig 49e4426ed5 RedundantFlagCalculationElimination: drop register writes 
this allows us to form real cmp instructions when we know PF is dead.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-19 08:54:47 -04:00
Alyssa Rosenzweig c4e2436885 ConstProp: optimize add eax, -1 and friends 
need to sign extend to get the constant inlined.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-19 08:54:47 -04:00
Alyssa Rosenzweig 200c6c054f IR: introduce POP operation 
rmw on a source, kind of terrible.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-14 09:37:06 -04:00
Alyssa Rosenzweig 231c28395c RegisterAllocationPass: clean up after pair removal 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-14 09:37:06 -04:00
Alyssa Rosenzweig 64a45c0d29 IR: remove pairs 
They're now unused. And won't be missed.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-14 09:37:06 -04:00
Alyssa Rosenzweig cab02be637 IR: remove unused pair create/extract 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-14 09:37:06 -04:00
Alyssa Rosenzweig 74f341bc0e IR: remove pair from cpuid 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-14 09:37:06 -04:00
Alyssa Rosenzweig feaa1af1a8 IR: remove pair from XGetBV 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-14 09:37:06 -04:00
Alyssa Rosenzweig d59d040b4e IR: add design doc breadcrumb 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-14 09:17:23 -04:00
Alyssa Rosenzweig a9c26cbf71 IR: add coalescing heuristics for pair replacements 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-14 09:17:23 -04:00
Alyssa Rosenzweig 13974df204 IR: drop CASPair pair result 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-08-14 09:17:23 -04:00