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262 Commits

Author SHA1 Message Date
Benjamin Kramer
7b88a49f3e Factor checked library call optimization into a common helper class and use it 
to unify the almost identical code in CodeGenPrepare and InstCombineCalls.

llvm-svn: 98338
 2010-03-12 09:27:41 +00:00
Benjamin Kramer
2fc395659c stpcpy is so similar to strcpy, it doesn't deserve a complete copy of the __strcpy_chk -> strcpy code. 
llvm-svn: 98284
 2010-03-11 20:45:13 +00:00
Eric Christopher
607de1de53 Lower stpcpy_chk when possible. 
llvm-svn: 98274
 2010-03-11 19:24:34 +00:00
Eric Christopher
4b7948e09e Do some final lowering in CodeGenPrepare of _chk calls similar to 
that in InstCombineCalls.

More call lowering needed.

llvm-svn: 98228
 2010-03-11 02:41:03 +00:00
Duncan Sands
19d0b47b1f 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.

llvm-svn: 96344
 2010-02-16 11:11:14 +00:00
Chris Lattner
b8639bc2d1 remove dead code. 
llvm-svn: 96109
 2010-02-13 19:07:06 +00:00
Chris Lattner
42c66b7270 Split some code out to a helper function (FindReusablePredBB) 
and add a doxygen comment.

Cache the phi entry to avoid doing tons of 
PHINode::getBasicBlockIndex calls in the common case.

On my insane testcase from re2c, this speeds up CGP from
617.4s to 7.9s (78x).

llvm-svn: 96083
 2010-02-13 05:35:08 +00:00
Chris Lattner
96b8826542 speed up CGP a bit by scanning predecessors through phi operands 
instead of with pred_begin/end.

llvm-svn: 96078
 2010-02-13 04:04:42 +00:00
Dan Gohman
4739e41ce9 Implement releaseMemory in CodeGenPrepare and free the BackEdges 
container data. This prevents it from holding onto dangling
pointers and potentially behaving unpredictably.

llvm-svn: 95409
 2010-02-05 19:24:11 +00:00
Dan Gohman
ca19445d08 When doing address-mode sinking, expand the base register first, rather 
than the scaled register. This makes it more likely that subsequent
AddrModeMatcher queries will match the new address the same way as the
old, instead of accidentally matching what had been the base register
as the new scaled register, and then failing to match the scaled register.
This fixes some problems with address-mode sinking multiple muls into a
block, which will be a lot more common with some upcoming
LoopStrengthReduction changes.

llvm-svn: 93935
 2010-01-19 22:45:06 +00:00
David Greene
74e2d4917d Change errs() to dbgs(). 
llvm-svn: 92611
 2010-01-05 01:27:11 +00:00
Evan Cheng
090ac0865a Revert 91280-91283, 91286-91289, 91291, 91293, 91295-91296. It apparently introduced a non-deterministic behavior in the optimizer somewhere. 
llvm-svn: 91598
 2009-12-17 09:39:49 +00:00
Nick Lewycky
8bca014d7f Remove unnecessary #include "llvm/LLVMContext.h". 
llvm-svn: 90836
 2009-12-08 05:45:41 +00:00
Bob Wilson
53bdae3802 Fix a comment typo. 
llvm-svn: 90487
 2009-12-03 21:47:07 +00:00
Chris Lattner
c872b09676 llvm::SplitEdge should refuse to split an edge from an indirectbr. 
Fix CodeGenPrepare to not try to split edges from indirectbr.

llvm-svn: 85690
 2009-10-31 22:04:43 +00:00
Dan Gohman
99429a00ff Move zext and sext casts fed by loads into the same block as the 
load, to help SelectionDAG fold them into the loads, unless
conditions are unfavorable.

llvm-svn: 84271
 2009-10-16 20:59:35 +00:00
Andreas Neustifter
f8cb758ba8 Preserve ProfileInfo during CodeGenPrepare. 
llvm-svn: 82034
 2009-09-16 09:26:52 +00:00
Chris Lattner
2dd09dbdf7 eliminate VISIBILITY_HIDDEN from Transforms/Scalar. PR4861 
llvm-svn: 80766
 2009-09-02 06:11:42 +00:00
Dan Gohman
ad1f0a1101 Eliminate the unused Context argument on one of the ICmpInst and FCmpInst 
constructors.

llvm-svn: 80049
 2009-08-25 23:17:54 +00:00
Chris Lattner
b25de3ff60 eliminate the "Value" printing methods that print to a std::ostream. 
This required converting a bunch of stuff off DOUT and other cleanups.

llvm-svn: 79819
 2009-08-23 04:37:46 +00:00
Owen Anderson
55f1c09e31 Push LLVMContexts through the IntegerType APIs. 
llvm-svn: 78948
 2009-08-13 21:58:54 +00:00
Owen Anderson
117c9e8497 Add contexts to some of the MVT APIs. No functionality change yet, just the infrastructure work needed to get the contexts to where they need to be first. 
llvm-svn: 78759
 2009-08-12 00:36:31 +00:00
Owen Anderson
53aa7a960c Rename MVT to EVT, in preparation for splitting SimpleValueType out into its own struct type. 
llvm-svn: 78610
 2009-08-10 22:56:29 +00:00
Owen Anderson
5a1acd9912 Move a few more APIs back to 2.5 forms. The only remaining ones left to change back are 
metadata related, which I'm waiting on to avoid conflicting with Devang.

llvm-svn: 77721
 2009-07-31 20:28:14 +00:00
Dan Gohman
29f2baf3b3 Convert a few more uses of llvm/Support/Streams.h to raw_ostream. 
llvm-svn: 77033
 2009-07-25 01:13:51 +00:00
Owen Anderson
edb4a70325 Revert the ConstantInt constructors back to their 2.5 forms where possible, thanks to contexts-on-types. More to come. 
llvm-svn: 77011
 2009-07-24 23:12:02 +00:00
Owen Anderson
47db941fd3 Get rid of the Pass+Context magic. 
llvm-svn: 76702
 2009-07-22 00:24:57 +00:00
Chris Lattner
470a8da807 use ExpandInlineAsm on TargetLowering instead of TargetAsmInfo. 
llvm-svn: 76442
 2009-07-20 17:52:52 +00:00
Owen Anderson
1e5f00e7a7 This started as a small change, I swear. Unfortunately, lots of things call the [I|F]CmpInst constructors. Who knew!? 
llvm-svn: 75200
 2009-07-09 23:48:35 +00:00
Owen Anderson
b5618da226 Convert the first batch of passes to use LLVMContext. 
llvm-svn: 74748
 2009-07-03 00:17:18 +00:00
Dan Gohman
4fe64deb7b Fix old-style type names in comments. 
llvm-svn: 73362
 2009-06-14 23:30:43 +00:00
Dan Gohman
760377effc Fix CodeGenPrepare's address-mode sinking to handle unusual 
addresses, involving Base values which do not have Pointer type.
This fixes PR4297.

llvm-svn: 72739
 2009-06-02 21:29:13 +00:00
Chris Lattner
351134ba93 Factor loop backedge finding out of CodeGenPrepare into a new 
FindFunctionBackedges function.

llvm-svn: 70819
 2009-05-04 02:25:58 +00:00
Chris Lattner
47d6e7b93e remove empty section 
llvm-svn: 68485
 2009-04-07 02:55:53 +00:00
Dale Johannesen
4026b041ce One more place to skip debug info. 
llvm-svn: 67811
 2009-03-27 01:13:37 +00:00
Dale Johannesen
db90560c1c Skip debug info one more place. (This one gets 
called from llc, not opt, but it's an IR level
optimization nevertheless.)

llvm-svn: 67724
 2009-03-26 01:15:07 +00:00
Evan Cheng
94419d6fdd Fix PR3784: If the source of a phi comes from a bb ended with an invoke, make sure the copy is inserted before the try range (unless it's used as an input to the invoke, then insert it after the last use), not at the end of the bb. 
Also re-apply r66140 which was disabled as a workaround.

llvm-svn: 66976
 2009-03-13 22:59:14 +00:00
Duncan Sands
1f853d6a2a Revert commit 66140 since it caused several failures 
in the Ada testcase.  Reverting this only covers up
the real problem, which is a nasty conceptual difficulty
in the phi elimination pass: when eliminating phi nodes
in landing pads, the register copies need to come before
the invoke, not at the end of the basic block which is
too late...  See PR3784.

llvm-svn: 66826
 2009-03-12 21:13:42 +00:00
Evan Cheng
b7922dee15 Do not split edges to EH landing pads. It will cause code size explosion. 
llvm-svn: 66140
 2009-03-05 06:31:26 +00:00
Evan Cheng
c380864d2c Factor address mode matcher out of codegen prepare to make it available to other passes, e.g. loop strength reduction. 
llvm-svn: 65134
 2009-02-20 18:24:38 +00:00
Dan Gohman
55ea72179c In CodeGenPrepare's debug output, use WriteAsOperand instead of 
printing getName(), so that unnamed values are printed correctly.

llvm-svn: 64468
 2009-02-13 17:45:12 +00:00
Chris Lattner
5297c63565 fix PR3537: if resetting bbi back to the start of a block, we need to 
forget about already inserted expressions.

llvm-svn: 64362
 2009-02-12 06:56:08 +00:00
Gabor Greif
eb61fcf2a1 Simplify the logic of getting hold of a PHI predecessor block. 
There is now a direct way from value-use-iterator to incoming block in PHINode's API.
This way we avoid the iterator->index->iterator trip, and especially the costly
getOperandNo() invocation. Additionally there is now an assertion that the iterator
really refers to one of the PHI's Uses.

llvm-svn: 62869
 2009-01-23 19:40:15 +00:00
Chris Lattner
64b7bd7f9e Fix rdar://6505632, an llc crash on 483.xalancbmk 
llvm-svn: 62470
 2009-01-18 20:35:00 +00:00
Duncan Sands
dc020f9c3c Rename getABITypeSize to getTypePaddedSize, as 
suggested by Chris.

llvm-svn: 62099
 2009-01-12 20:38:59 +00:00
Evan Cheng
8804293fe9 Find loop back edges only after empty blocks are eliminated. 
llvm-svn: 61752
 2009-01-05 21:17:27 +00:00
Evan Cheng
3b3de7c228 - CodeGenPrepare does not split loop back edges but it only knows about back edges of single block loops. It now does a DFS walk to find loop back edges. 
- Use SplitBlockPredecessors to factor out common predecessors of the critical edge destination. This is disabled for now due to some regressions.

llvm-svn: 61248
 2008-12-19 18:03:11 +00:00
Chris Lattner
8a172daa55 don't call MergeBasicBlockIntoOnlyPred on a block whose only 
predecessor is itself.  This doesn't make sense, and this is
a dead infinite loop anyway.

llvm-svn: 60210
 2008-11-28 19:54:49 +00:00
Chris Lattner
c6c481cdfc remove doConstantPropagation and dceInstruction, they are just 
wrappers around the interesting code and use an obscure iterator
abstraction that dates back many many years.

Move EraseDeadInstructions to Transforms/Utils and name it
RecursivelyDeleteTriviallyDeadInstructions.

llvm-svn: 60191
 2008-11-27 22:57:53 +00:00
Chris Lattner
4059f43b74 defensive patch: if CGP is merging a block with the entry block, make sure 
it ends up being the entry block.

llvm-svn: 60180
 2008-11-27 19:29:14 +00:00