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0de5cad74d
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190 Commits

Author SHA1 Message Date
Chris Lattner
0de5cad74d LICM does get dead instructions input to it. Instead of sinking them 
out of loops, just delete them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112451 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-29 18:22:25 +00:00
Chris Lattner
d9a5daeb77 use moveBefore instead of remove+insert, it avoids some 
symtab manipulation, so its faster (in addition to being
more elegant)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112450 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-29 18:18:40 +00:00
Chris Lattner
1b9c848d0a revert 112448 for now. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112449 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-29 18:11:16 +00:00
Chris Lattner
bb07ed3bb5 optimize LICM::hoist to use moveBefore. Correct its updating 
of AST to remove the hoisted instruction from the AST, since it
is no longer in the loop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112448 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-29 18:03:33 +00:00
Chris Lattner
98917503c7 fix some bugs (found by inspection) where LICM would not update 
LICM correctly.  When sinking an instruction, it should not add
entries for the sunk instruction to the AST, it should remove
the entry for the sunk instruction.  The blocks being sunk to
are not in the loop, so their instructions shouldn't be in the
AST (yet)!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112447 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-29 18:00:00 +00:00
Chris Lattner
4282e32712 rework the ownership of subloop alias information: instead of 
keeping them around until the pass is destroyed, keep them
around a) just when useful (not for outer loops) and b) destroy
them right after we use them.  This should reduce memory use
and fixes potential bugs where a loop is deleted and another
loop gets allocated to the same address.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112446 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-29 17:46:00 +00:00
Chris Lattner
e418ac832c licm preserves the cfg, it doesn't have to explicitly say it 
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 
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. 
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. 
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. 
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
d7bc19dfee reduce indentation in LICM::sink by using early exits, use 
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. 
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
Owen Anderson
90c579de5a Reapply r110396, with fixes to appease the Linux buildbot gods. 
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
Owen Anderson
1f74590e9d Revert r110396 to fix buildbots. 
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 
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
Nick Lewycky
39a383124b Add missing newline to debug statement. 
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
Owen Anderson
d13db2c59c Fix batch of converting RegisterPass<> to INTIALIZE_PASS(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109045 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-21 22:09:45 +00:00
Dan Gohman
1e381fcd55 Reorder the contents of various getAnalysisUsage functions, eliminating 
a redundant loopsimplify run from the default -O2 sequence.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108539 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-16 17:58:45 +00:00
Gabor Greif
488d4421c6 performance: cache the dereferenced use_iterator 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101250 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-14 16:13:56 +00:00
Duncan Sands
1df9859c40 There are two ways of checking for a given type, for example isa<PointerType>(T) 
and T->isPointerTy().  Convert most instances of the first form to the second form.
Requested by Chris.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96344 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-16 11:11:14 +00:00
David Greene
f15826999b Change errs() to dbgs(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92619 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-05 01:27:30 +00:00
Devang Patel
44a29e066a Remove dead debug info intrinsics. 
Intrinsic::dbg_stoppoint
 Intrinsic::dbg_region_start 
 Intrinsic::dbg_region_end 
 Intrinsic::dbg_func_start
AutoUpgrade simply ignores these intrinsics now.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92557 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-05 01:10:40 +00:00
Dan Gohman
92329c7fbe Add Loop contains utility methods for testing whether a loop 
contains another loop, or an instruction. The loop form is
substantially more efficient on large loops than the typical
code it replaces.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91654 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-18 01:24:09 +00:00
Eric Christopher
3472ae1e7b Make sure the immediate dominator isn't NULL through iterations 
of the loop. We could get to this condition via indirect
branches.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91009 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-10 00:25:41 +00:00
Nick Lewycky
ce2c51b670 Pull LLVMContext out of PromoteMemToReg. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89645 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-23 03:50:44 +00:00
Dan Gohman
dab249b3b7 Enable hoisting of loads from constant memory by default. In cases where 
they are lowered to instruction sequences more complex than a simple
load, such that CodeGen cannot rematerialize them, a reload from a
spill slot is likely to be cheaper than the complex sequence.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89374 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-19 19:00:10 +00:00
Dan Gohman
03e896bd60 Update various Loop optimization passes to cope with the possibility that 
LoopSimplify form may not be available.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86175 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-05 21:11:53 +00:00
Devang Patel
9674d15120 Use isVoidTy() 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84118 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-14 17:29:00 +00:00
Devang Patel
228ebd0f4c Check void type before using RAUWd. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84049 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-13 22:56:32 +00:00
Devang Patel
1bf5ebc7be Do not check use_empty() before replaceAllUsesWith(). This gives ValueHandles a chance to get properly updated. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84033 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-13 21:41:20 +00:00
Evan Cheng
67d1d1f832 Make licm debug message readable. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83908 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-12 22:25:23 +00:00
Torok Edwin
849a639e17 Remove CleanupDbgInfo, instcombine does this and its not worth duplicating it 
here.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83789 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-11 19:58:35 +00:00
Torok Edwin
9289ae85b4 LICM shouldn't sink/delete debug information. Fix this and add a testcase. 
For now the metadata of sinked/hoisted instructions is still wrong, but that'll
be fixed when instructions will have debug metadata directly attached.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83786 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-11 19:15:54 +00:00
Dan Gohman
f37cfed791 Grab an LLVM Context from an instruction that exists rather than one 
that is deleted in some situations. This fixes a use-after-free.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82903 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-27 16:10:30 +00:00
Nick Lewycky
6776064d19 Instruction::clone does not need to take an LLVMContext&. Remove that and 
update all the callers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82889 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-27 07:38:41 +00:00
Dan Gohman
5c89b5240c Re-apply r80926, with fixes: keep the domtree informed of new blocks 
that get created during loop unswitching, and fix SplitBlockPredecessors'
LCSSA updating code to create new PHIs instead of trying to just move
existing ones.

Also, optimize Loop::verifyLoop, since it gets called a lot. Use
searches on a sorted list of blocks instead of calling the "contains"
function, as is done in other places in the Loop class, since "contains"
does a linear search. Also, don't call verifyLoop from LoopSimplify or
LCSSA, as the PassManager is already calling verifyLoop as part of
LoopInfo's verifyAnalysis.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81221 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-08 15:45:00 +00:00
Evan Cheng
8f78a58e14 Revert r80926. It causes loop unswitch assertion and slow down some JIT tests significantly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81101 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-06 02:26:10 +00:00
Dan Gohman
8fc5ad3369 Add a verifyAnalysis to LoopInfo, LoopSimplify, and LCSSA form that verify 
that these passes are properly preserved.

Fix several transformation passes that claimed to preserve LoopSimplify
form but weren't.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80926 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-03 16:31:42 +00:00
Chris Lattner
3e8b6631e6 eliminate VISIBILITY_HIDDEN from Transforms/Scalar. PR4861 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80766 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-02 06:11:42 +00:00
Chris Lattner
bdff548e4d eliminate the "Value" printing methods that print to a std::ostream. 
This required converting a bunch of stuff off DOUT and other cleanups.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79819 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-23 04:37:46 +00:00
Owen Anderson
1d0be15f89 Push LLVMContexts through the IntegerType APIs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78948 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-13 21:58:54 +00:00
Owen Anderson
9e9a0d5fc2 Move more code back to 2.5 APIs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77635 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-30 23:03:37 +00:00
Dan Gohman
fc2a3ed0c9 Make AliasAnalysis and related classes use 
getAnalysisIfAvailable<TargetData>().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77028 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-25 00:48:42 +00:00
Daniel Dunbar
ce63ffb52f More migration to raw_ostream, the water has dried up around the iostream hole. 
- Some clients which used DOUT have moved to DEBUG. We are deprecating the
   "magic" DOUT behavior which avoided calling printing functions when the
   statement was disabled. In addition to being unnecessary magic, it had the
   downside of leaving code in -Asserts builds, and of hiding potentially
   unnecessary computations.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77019 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-25 00:23:56 +00:00
Owen Anderson
e922c02019 Get rid of the Pass+Context magic. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76702 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-22 00:24:57 +00:00
Eli Friedman
0b79a7727d Replace isTrapping with a new, similar method called 
isSafeToSpeculativelyExecute. The new method is a bit closer to what 
the callers actually care about in that it rejects more things callers 
don't want.  It also adds more precise handling for integer 
division, and unifies code for analyzing the legality of a speculative 
load.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76150 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-17 04:28:42 +00:00
Owen Anderson
50dead06ff Revert yesterday's change by removing the LLVMContext parameter to AllocaInst and MallocInst. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75863 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-15 23:53:25 +00:00
Owen Anderson
9adc0abad3 Move EVER MORE stuff over to LLVMContext. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75703 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-14 23:09:55 +00:00
Owen Anderson
333c400965 This started as a small change, I swear. Unfortunately, lots of things call the [I|F]CmpInst constructors. Who knew!? 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75200 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-09 23:48:35 +00:00