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Commit Graph

97 Commits

Author SHA1 Message Date
Dan Gohman
ead0109f5b Add a pass which prints out all the memdep dependencies.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114121 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-16 22:08:32 +00:00
Owen Anderson
25e9405272 Rename ValuePropagation to a more descriptive CorrelatedValuePropagation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112591 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-31 07:48:34 +00:00
Chris Lattner
5f88af5376 remove the ABCD and SSI passes. They don't have any clients that
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
Owen Anderson
a0b59f6bd2 Add a prototype of a new peephole optimizing pass that uses LazyValue info to simplify PHIs and select's.
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
Peter Collingbourne
3bababf880 Add an atomic lowering pass
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
Dan Gohman
c182cb5784 Sketch up a preliminary Type-Based Alias Analysis implementation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110077 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-02 23:11:01 +00:00
Tobias Grosser
f96b006367 Add new RegionInfo pass.
The RegionInfo pass detects single entry single exit regions in a function,
where a region is defined as any subgraph that is connected to the remaining
graph at only two spots.
Furthermore an hierarchical region tree is built.
Use it by calling "opt -regions analyze" or "opt -view-regions".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109089 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-22 07:46:31 +00:00
Devang Patel
26d14294de Debugging infomration is encoded in llvm IR using metadata. This is designed
such a way that debug info for symbols preserved even if symbols are
optimized away by the optimizer. 

Add new special pass to remove debug info for such symbols.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107416 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-01 19:49:20 +00:00
Dan Gohman
ef0b14593b Add a simple module-level debug info printer. It just sets up a
DebugInfoFinder and iterates over all the contents calling print.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103262 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-07 16:22:32 +00:00
Dan Gohman
28a193ed8b Add an LLVM IR version of code sinking. This uses the same simple algorithm
as MachineSink, but it isn't constrained by MachineInstr-level details.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103257 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-07 15:40:13 +00:00
Owen Anderson
fd64901579 SCCVN, we hardly knew ye!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101117 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13 05:24:08 +00:00
Dan Gohman
113902e9fb Add a -lint pass which checks for common sources of undefined or likely
unintended behavior.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100798 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-08 18:47:09 +00:00
Chris Lattner
a9cf19670f remove anders-aa from mainline, it isn't maintained and is
tantalyzing enough that people keep trying to use it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97483 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-01 19:24:17 +00:00
Eric Christopher
d2592ff69b Pull these back out, they're a little too aggressive and time
consuming for a simple optimization.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95671 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-09 17:29:18 +00:00
Eric Christopher
1926b648e1 Add a new pass to do llvm.objsize lowering using SCEV.
Initial skeleton and SCEVUnknown lowering implemented,
the rest should come relatively quickly.  Move testcase
to new directory.

Move pass to right before SimplifyLibCalls - which is
moved down a bit so we can take advantage of a few opts.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95628 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-09 00:35:38 +00:00
Chris Lattner
5fadf17709 remove the random sampling framework, which is not maintained anymore.
If there is interest, it can be resurrected from SVN.  PR4912.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92422 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-02 20:07:03 +00:00
Chris Lattner
f8fb7c26ee remove the now dead condprop pass, PR3906.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86810 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-11 05:56:35 +00:00
Chris Lattner
10f2d13d58 Stub out a new lazy value info pass, which will eventually
vend value constraint information to the optimizer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86767 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-11 00:22:30 +00:00
Dan Gohman
9f476e3179 Remove CodeGenLICM. It's largely obsoleted by MachineLICM's new ability
to unfold loop-invariant loads.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85657 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-31 14:35:41 +00:00
Nick Lewycky
40cc524ede Add ABCD, a generalized implementation of the Elimination of Array Bounds
Checks on Demand algorithm which looks at arbitrary branches instead of loop
iterations. This is GSoC work by Andre Tavares with only editorial changes
applied!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85382 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-28 07:03:15 +00:00
Owen Anderson
8b251c25b2 Forgot to commit these.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85180 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-26 23:56:52 +00:00
Victor Hernandez
046e78ce55 Remove FreeInst.
Remove LowerAllocations pass.
Update some more passes to treate free calls just like they were treating FreeInst.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85176 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-26 23:43:48 +00:00
Dan Gohman
6000e253d4 Check in the experimental GEP splitter pass. This pass splits complex
GEPs (more than one non-zero index) into simple GEPs (at most one
non-zero index).  In some simple experiments using this it's not
uncommon to see 3% overall code size wins, because it exposes
redundancies that can be eliminated, however it's tricky to use
because instcombine aggressively undoes the work that this pass does.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85144 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-26 19:12:14 +00:00
Victor Hernandez
66284e063a Auto-upgrade free instructions to calls to the builtin free function.
Update all analysis passes and transforms to treat free calls just like FreeInst.
Remove RaiseAllocations and all its tests since FreeInst no longer needs to be raised.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84987 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-24 04:23:03 +00:00
Chris Lattner
98b532cf33 remove the IndMemRemPass, which only made sense for when malloc/free were intrinsic
instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84404 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-18 05:02:09 +00:00
Chris Lattner
b839c5577d add function passes for printing various dominator datastructures
accessible through opt.  Patch by Tobias Grosser!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84397 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-18 04:10:40 +00:00
Chris Lattner
8ef27511e3 remove LoopVR pass. According to Nick:
"LoopVR's logic was copied into ScalarEvolution::getUnsignedRange and 
::getSignedRange. Please delete LoopVR."



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83531 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-08 06:42:44 +00:00
Chris Lattner
7963e15951 remove predicate simplifier, it never got the last bugs beaten
out of it, and jump threading, condprop and gvn are now getting
most of the benefit.  This was approved by Nicholas and Nicolas.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83390 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-06 16:59:46 +00:00
Chris Lattner
99be299edb remove the GVNPRE pass. It has been subsumed by the GVN pass.
Ok'd by Owen.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83193 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-01 02:18:36 +00:00
Dan Gohman
6f65d79750 Add a new pass for doing late hoisting of floating-point and vector
constants out of loops. These aren't covered by the regular LICM
pass, because in LLVM IR constants don't require separate
instructions. They're not always covered by the MachineLICM pass
either, because it doesn't know how to unfold folded constant-pool
loads. This is somewhat experimental at this point, and off by
default.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82076 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-16 20:25:11 +00:00
Andreas Neustifter
ad09d42e04 Addedum to r80712, forgot to add files.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80713 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-01 19:05:58 +00:00
Andreas Neustifter
e7ddcfdebe Preparation for Optimal Edge Profiling:
This adds a pass to verify the current profile against the flow conditions.
This is very helpful when later on trying to perserve the profiling information
during all passes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80666 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-01 08:48:42 +00:00
Dan Gohman
2385e0e22c Create a ScalarEvolution-based AliasAnalysis implementation.
This is a simple AliasAnalysis implementation which works by making
ScalarEvolution queries. ScalarEvolution has a more complete understanding
of arithmetic than BasicAA's collection of ad-hoc checks, so it handles
some cases that BasicAA misses, for example p[i] and p[i+1] within the
same iteration of a loop.

This is currently experimental. It may be that the main use for this pass
will be to help find cases where BasicAA can be profitably extended, or
to help in the development of the overall AliasAnalysis infrastructure,
however it's also possible that it could grow up to become a directly
useful pass.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80098 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-26 14:53:06 +00:00
Daniel Dunbar
55e354ac0e Add a basic static ProfileInfo provider (ProfileEstimatorPass).
- Part of optimal static profiling patch sequence by Andreas Neustifter.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78484 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-08 18:44:18 +00:00
Torok Edwin
969f28dfb6 Introduce a pointertracking pass.
For now this only computes the allocated size of the memory pointed to by a
pointer, and offset a pointer from allocated pointer.
The actual checkLimits part will come later, after another round of review.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75657 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-14 18:44:28 +00:00
Nick Lewycky
4c12ee5f61 Forgot a couple files when adding the -ssi-everything pass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75136 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-09 15:33:55 +00:00
Nick Lewycky
715029478c Add Static Single Information construction pass written by André Tavares!
Use it by requiring it through the pass manager, then calling its createSSI
method on the variables that you want in SSI form.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74780 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-03 19:28:36 +00:00
Andreas Bolka
cb21010fa0 Scaffolding for LDA pass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74120 91177308-0d34-0410-b5e6-96231b3b80d8
2009-06-24 21:29:13 +00:00
Owen Anderson
ca399021d4 Add an early implementation of a partial inlining pass. The idea behind this
is that, for functions whose bodies are entirely guarded by an if-statement, it
can be profitable to pull the test out of the callee and into the caller.

This code has had some cursory testing, but still has a number of known issues
on the LLVM test suite.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73338 91177308-0d34-0410-b5e6-96231b3b80d8
2009-06-14 08:26:32 +00:00
Dan Gohman
3751f564e3 Add a liveness analysis pass for LLVM IR values. This computes
the set of blocks in which values are used, the set in which
values are live-through, and the set in which values are
killed. For the live-through and killed sets, conservative
approximations are used.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67309 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-19 17:29:04 +00:00
Duncan Sands
e02f724880 Fix PR3415 (infinite loop in EscapeAnalysis) by
deleting the escape analysis pass.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63197 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-28 11:33:59 +00:00
Duncan Sands
9e89ba31f1 Rename AddReadAttrs to FunctionAttrs, and teach it how
to work out (in a very simplistic way) which function
arguments (pointer arguments only) are only dereferenced
and so do not escape.  Mark such arguments 'nocapture'.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61525 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-31 16:14:43 +00:00
Torok Edwin
6e68106a47 Add -print-dbginfo pass that prints LLVM IR with comments inserted to show
which source/line a certain BB/instruction comes from, original variable names,
and original (unmangled) C++ name of functions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61085 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16 09:09:19 +00:00
Devang Patel
f17fc461d1 Add new helper pass that strips all symbol names except debugging information.
This pass makes it easier to test wheter debugging info. influences optimization passes or not.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59552 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-18 21:34:39 +00:00
Devang Patel
94b29c3eac Undo previous check-in.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59092 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-11 23:57:33 +00:00
Devang Patel
90d45b8a4a Add utility pass to remove dbg info.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59068 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-11 19:33:39 +00:00
Dan Gohman
8f027c7fea Add a new pass to simplify specific half_powr function calls. This is
a specialized pass that it not likely to be generally useful.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58732 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-04 23:41:45 +00:00
Nick Lewycky
579a024661 Add a new MergeFunctions pass. It finds identical functions and merges them.
This triggers only 60 times in llvm-test (look at .llvm.bc, not .linked.rbc)
and so it probably wont be turned on by default. Also, may of those are likely
to go away when PR2973 is fixed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58557 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-02 05:52:50 +00:00
Daniel Dunbar
f4db3a51c7 Privatize PrintModulePass and PrintFunctionPass and add
createPrintModulePass and createPrintFunctionPass.
 - So clients who compile w/o RTTI can use them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57933 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-21 23:33:38 +00:00
Owen Anderson
36b708a318 Add EscapeAnalysis.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57411 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-12 06:49:21 +00:00