Erik Eckstein
50c299e0bf
LoopInvariantCodeMotion: don't reuse existing instructions in the loop pre-header
...
This is wrong for hoisted load instructions because we don't check for aliasing in the pre-header.
And for side-effect-free instructions it's not really necessary, because that can cleanup CSE afterwards.
Fixes a miscompile
rdar://164034503
2025-11-18 21:23:13 +01:00
Erik Eckstein
5b8a1a7b68
LoopInvariantCodeMotion: don't extend "read" access scopes over memory writes to the same address.
...
We must not do this even if the write is _not_ in an access scope, because this would confuse alias analysis.
Fixes a mis-compile.
2025-10-22 20:55:22 +02:00
Erik Eckstein
dafb43b124
LoopInvariantCodeMotion: a small code cleanup
...
NFC
2025-10-22 20:55:22 +02:00
Erik Eckstein
55cdc31936
LoopInvariantCodeMotion: a small refactoring
...
which is now possible as we removed the "fallthrough" from the previous case
2025-10-06 17:57:12 +02:00
Erik Eckstein
e88096e971
LoopInvariantCodeMotion: fix check for hoisting load_borrow instructions
...
We need to check aliasing for all kind of side-effect instructions, not just stores and destroys
2025-10-06 17:57:12 +02:00
Erik Eckstein
b527020364
LoopInvariantCodeMotion: bail on split load [take]
...
We currently don't support split `load [take]`, i.e. `load [take]` which does _not_ load all non-trivial fields of the initial value.
2025-09-30 10:39:51 +02:00
Erik Eckstein
fc6302e3e9
LoopInvariantCodeMotion: correctly handle load [copy]
...
When moving loads and stores out of a loop, a `load [copy]` must be replaced by a `copy_value`.
2025-09-30 10:39:51 +02:00
Erik Eckstein
7bbe5c6fe2
LoopInvariantCodeMotion: don't hoist loads and stores if the memory location is not initialized at loop exits.
...
If the memory is not initialized at all exits, it would be wrong to insert stores at exit blocks.
2025-09-30 10:39:51 +02:00
Jakub Florek
aebebd9ee2
Merge pull request #84463 from MAJKFL/fix-licm-missing-earlier-materializable-projection-check
...
LICM fix missing materializable projection check
2025-09-24 17:19:39 +01:00
Jakub Florek
6788017cfb
Add earlier check before load projection that bails when it's not materializable.
2025-09-24 11:49:59 +01:00
Jakub Florek
b12e0ef554
Don't hoist scoped instructions in dead end loops.
2025-09-22 12:12:19 +01:00
Jakub Florek
38f28c1049
Reapply "Merge pull request #84045 from MAJKFL/new-sil-licm-pass-copy-ownership"
...
This reverts commit d2cd281d4c
2025-09-19 16:06:35 +01:00
Jakub Florek
d2cd281d4c
Revert "Merge pull request #84045 from MAJKFL/new-sil-licm-pass-copy-ownership"
...
This reverts commit a5c61565252b6ea81b9e
2025-09-17 15:52:48 +01:00
Jakub Florek
e84bc084f4
Check for aliasing destroy_addr before hoisting load_borrow - end_borrow pair.
2025-09-15 12:42:30 +01:00
Jakub Florek
0b75a81b65
Add licm Ownership support.
2025-09-10 16:18:51 +01:00
Jakub Florek
6955bdf564
Merge pull request #84173 from MAJKFL/fix-licm-not-projecting-load-path
...
Fix licm not projecting load path before load splitting.
2025-09-09 22:43:53 +01:00
Jakub Florek
be72ad726a
Fix licm not projecting load path before load splitting.
2025-09-09 17:02:29 +01:00
Jakub Florek
e905df42f2
Fix read apply hoisted with conflicting write apply.
2025-09-02 15:53:53 +01:00
Jakub Florek
bab00113b2
Fix licm handling of unreferenceable storage.
2025-08-29 12:46:27 +01:00
Jakub Florek
07ac8b3478
Add new loop invariant code motion.
2025-08-28 21:00:33 +01:00
