Dan Gohman
6a83271532
Add some comments.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112437 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-29 15:27:08 +00:00
Dan Gohman
3902f9fca8
Move this debug output into GenerateAllReuseFormula, to declutter
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the high-level logic.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112436 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-29 15:21:38 +00:00
Dan Gohman
a7d0d64b7a
Delete an unused declaration.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112435 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-29 15:19:11 +00:00
Dan Gohman
46fd7a6ef8
Do one lookup instead of two.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112434 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-29 15:18:49 +00:00
Chris Lattner
e418ac832c
licm preserves the cfg, it doesn't have to explicitly say it
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preserves domfrontier. It does preserve AA though.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112419 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-29 07:02:56 +00:00
Chris Lattner
44e2bd31f1
now that it doesn't use the PromoteMemToReg function, LICM doesn't
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require DomFrontier. Dropping this doesn't actually save any runs
of the pass though.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112418 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-29 06:49:44 +00:00
Chris Lattner
e488064922
completely rewrite the memory promotion algorithm in LICM.
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Among other things, this uses SSAUpdater instead of
PromoteMemToReg.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112417 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-29 06:43:52 +00:00
Chris Lattner
63a75c13b1
use getUniqueExitBlocks instead of a manual set.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112412 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-29 05:12:21 +00:00
Chris Lattner
a6a36f59b4
reimplement LICM::sink to use SSAUpdater instead of PromoteMemToReg.
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This leads to much simpler code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112410 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-29 04:55:06 +00:00
Chris Lattner
abd2a75900
remove dead proto
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112408 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-29 04:53:24 +00:00
Chris Lattner
d7bc19dfee
reduce indentation in LICM::sink by using early exits, use
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getUniqueExitBlocks instead of getExitBlocks and a manual
set to eliminate dupes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112405 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-29 04:28:20 +00:00
Chris Lattner
dc1ceb370a
modernize this pass a bit: use efficient set/map and reduce indentation.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112404 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-29 04:23:04 +00:00
Chris Lattner
5f88af5376
remove the ABCD and SSI passes. They don't have any clients that
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I'm aware of, aren't maintained, and LVI will be replacing their value.
nlewycky approved this on irc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112355 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-28 03:51:24 +00:00
Chris Lattner
b188a3789e
squish dead code.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112350 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-28 03:21:03 +00:00
Benjamin Kramer
6cfabc7974
Update CMake build. Add newline at end of file.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112332 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-28 00:11:12 +00:00
Owen Anderson
a0b59f6bd2
Add a prototype of a new peephole optimizing pass that uses LazyValue info to simplify PHIs and select's.
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This pass addresses the missed optimizations from PR2581 and PR4420.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112325 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-27 23:31:36 +00:00
Owen Anderson
fc2fb17fb7
Fix typos in comments.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112286 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-27 20:32:56 +00:00
Owen Anderson
660cab32fe
Use LVI to eliminate conditional branches where we've tested a related condition previously. Update tests for this change.
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This fixes PR5652.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112270 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-27 17:12:29 +00:00
Owen Anderson
62efd3b385
Make JumpThreading smart enough to properly thread StrSwitch when it's compiled with clang++.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112198 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-26 17:40:24 +00:00
Chris Lattner
aafe626c7f
remove some llvmcontext arguments that are now dead post-refactoring.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112104 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-25 23:00:45 +00:00
Owen Anderson
53c36c41ae
Turn LVI on, previously detected failures should be fixed now.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111923 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-24 17:21:18 +00:00
Owen Anderson
b6ad691ad7
Turn LVI back off, I have a testcase now.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111834 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-23 19:59:27 +00:00
Owen Anderson
0e2c359a3e
Re-enable LazyValueInfo. Monitoring for failures.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111816 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-23 18:12:23 +00:00
Owen Anderson
02dd53e1c5
Now that PassInfo and Pass::ID have been separated, move the rest of the passes over to the new registration API.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111815 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-23 17:52:01 +00:00
Owen Anderson
684d8d5b50
Disable LVI while I evaluate a failure.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111551 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-19 19:47:08 +00:00
Owen Anderson
f2d197b77a
Tentatively enabled LVI by default. I'll be monitoring for any failures.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111543 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-19 19:04:40 +00:00
Dan Gohman
694a15eabe
Process the step before the start, because it's usually the simpler
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of the two.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111495 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-19 01:02:31 +00:00
Owen Anderson
00ac77ef88
Inform LazyValueInfo whenever a block is deleted, to avoid dangling pointer issues.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111382 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-18 18:39:01 +00:00
Chris Lattner
2fa7b48eb5
Fix PR7755: knowing something about an inval for a pred
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from the LHS should disable reconsidering that pred on the
RHS. However, knowing something about the pred on the RHS
shouldn't disable subsequent additions on the RHS from
happening.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111349 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-18 03:14:36 +00:00
Chris Lattner
473fc96889
remove some dead code.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111344 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-18 02:41:56 +00:00
Chris Lattner
3126f1c028
remove dead prototype.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111342 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-18 02:37:06 +00:00
Dan Gohman
fc8042a122
When rotating loops, put the original header at the bottom of the
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loop, making the resulting loop significantly less ugly. Also, zap
its trivial PHI nodes, since it's easy.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111255 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-17 17:39:21 +00:00
Evan Cheng
e1bcb440dc
Add an option to disable codegen prepare critical edge splitting. In theory, PHI elimination is already doing all (most?) of the splitting needed. But machine-licm and machine-sink seem to miss some important optimizations when splitting is disabled.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111224 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-17 01:34:49 +00:00
Dan Gohman
3e22b7c916
Instead of having CollectSubexpr's categorize operands as interesting or
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uninteresting, just put all the operands on one list and make
GenerateReassociations make the decision about what's interesting.
This is simpler, and it avoids an extra ScalarEvolution::getAddExpr call.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111133 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-16 15:50:00 +00:00
Dan Gohman
4065f60912
Put add operands in ScalarEvolution-canonical order, when convenient.
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This isn't necessary, because ScalarEvolution sorts them anyway,
but it's tidier this way.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111132 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-16 15:39:27 +00:00
Dan Gohman
e2c6d131d1
Teach SimplifyCFG how to simplify indirectbr instructions.
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- Eliminate redundant successors.
- Convert an indirectbr with one successor into a direct branch.
Also, generalize SimplifyCFG to be able to be run on a function entry block.
It knows quite a few simplifications which are applicable to the entry
block, and it only needs a few checks to avoid trouble with the entry block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111060 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-14 00:29:42 +00:00
Dan Gohman
e62d58884a
Fix LSR's ExtractImmediate and ExtractSymbol to avoid calling
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ScalarEvolution::getAddExpr, which can be pretty expensive, when nothing
has changed, which is pretty common.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111042 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-13 21:17:19 +00:00
Chris Lattner
1522ce9770
fix PR7876: If ipsccp decides that a function's address is taken
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before it rewrites the code, we need to use that in the post-rewrite pass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110962 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-12 22:25:23 +00:00
Owen Anderson
5015b3417f
Don't attempt the PRE inline asm calls, since we don't value number them yet. Fixes PR7835.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110489 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-07 00:20:35 +00:00
Owen Anderson
90c579de5a
Reapply r110396, with fixes to appease the Linux buildbot gods.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110460 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06 18:33:48 +00:00
Nick Lewycky
e52e9d6045
Fix uninitialized variable warning.
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Also move 'default' case next to a real case to help compiler optimize in
non-Debug builds.
No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110435 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06 07:43:46 +00:00
Owen Anderson
1f74590e9d
Revert r110396 to fix buildbots.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110410 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06 00:23:35 +00:00
Owen Anderson
9ccaf53ada
Don't use PassInfo* as a type identifier for passes. Instead, use the address of the static
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ID member as the sole unique type identifier. Clean up APIs related to this change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110396 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05 23:42:04 +00:00
Owen Anderson
f35b08db50
Give JumpThreading+LVI a long-form cl::opt so that it's easier to toggle the default.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110384 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05 22:11:31 +00:00
Owen Anderson
b57e6558c7
Experiments show that we can safely increase our unrolling threshold without unduly impacting code size, particularly
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since unrolling is not enabled at -Os.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110233 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-04 18:32:46 +00:00
Dan Gohman
4eaee28e34
Fix whitespace.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110223 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-04 17:43:57 +00:00
Dan Gohman
2511bd06de
Fix a comment.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110181 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-04 01:16:35 +00:00
Peter Collingbourne
3bababf880
Add an atomic lowering pass
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110113 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-03 16:19:16 +00:00
Oscar Fuentes
ee56c42168
Prefix next' iterator operation with
llvm::'.
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Fixes potential ambiguity problems on VS 2010.
Patch by nobled!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110029 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-02 06:00:15 +00:00
Nick Lewycky
39a383124b
Add missing newline to debug statement.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109886 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-30 20:27:01 +00:00