Commit Graph

2033 Commits

Author SHA1 Message Date
Chris Lattner
6563371bad restructure the top level non-local ptr dep query to handle
the first block of a query specially.  This makes the "complete query
caching" subsystem more effective, avoiding predecessor queries.  This
speeds up GVN another 4%.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60752 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-09 07:52:59 +00:00
Chris Lattner
9863c3f507 rename getNonLocalPointerDepInternal -> getNonLocalPointerDepFromBB
and split its inner loop out into a new GetNonLocalInfoForBlock
function.  No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60751 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-09 07:47:11 +00:00
Nick Lewycky
0bed364307 It's easy to handle SLE/SGE when the loop has a unit stride.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60748 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-09 07:25:04 +00:00
Chris Lattner
ba4dacc875 if we have two elements, insert both, don't use std::sort.
This speeds up the new GVN by another 3%


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60747 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-09 07:05:45 +00:00
Chris Lattner
1aeadacdad If we're only adding one new element to 'Cache', insert it into its known
position instead of using a full sort. This speeds up GVN by ~4% with the
new memdep stuff.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60746 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-09 06:58:04 +00:00
Chris Lattner
511b36c00f convert a couple other places that use pred_iterator to use the caching
pred iterator.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60745 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-09 06:44:17 +00:00
Chris Lattner
4012fdda13 use hte new pred cache to speed up the new non-local memdep
queries.  This speeds up GVN using the new queries (not yet
checked in) by just over 10%.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60743 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-09 06:28:49 +00:00
Duncan Sands
1832705b06 Fix comment typo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60697 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-08 14:01:59 +00:00
Chris Lattner
11dcd8d38d add another level of caching for non-local pointer queries, keeping
track of whether the CachedNonLocalPointerInfo for a block is specific
to a block.  If so, just return it without any pred scanning.  This is
good for a 6% speedup on GVN (when it uses this lookup method, which
it doesn't right now).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60695 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-08 07:31:50 +00:00
Chris Lattner
295d4e953a Some minor optimizations for isObjectSmallerThan.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60687 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-08 06:28:54 +00:00
Chris Lattner
3f7eb5b795 add an assert. the cast<> below would catch this but a message is more
useful.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60674 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-07 18:45:15 +00:00
Chris Lattner
0655f73ef7 factor some code better.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60673 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-07 18:42:51 +00:00
Chris Lattner
d44745d241 factor some code, fixing some fixme's.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60672 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-07 18:39:13 +00:00
Chris Lattner
6290f5cac2 add support for caching pointer dependence queries. Nothing uses this yet
so it "can't" break anything.  That said, it does appear to work.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60654 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-07 08:50:20 +00:00
Chris Lattner
9a193fd8ae Some internal refactoring to make it easier to cache results.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60650 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-07 02:56:57 +00:00
Chris Lattner
7ebcf03246 Introduce a new MemDep::getNonLocalPointerDependency
method.  This will eventually take over load/store dep
queries from getNonLocalDependency.  For now it works
fine, but is incredibly slow because it does no caching.
Lets not switch GVN to use it until that is fixed :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60649 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-07 02:15:47 +00:00
Chris Lattner
e79be944c8 push the "pointer case" up the analysis stack a bit. This causes
duplication of logic (in 2 places) to determine what pointer a 
load/store touches.  This will be addressed in a future commit.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60648 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-07 01:50:16 +00:00
Chris Lattner
d8dd934d16 make clients have to know how to call getCallSiteDependencyFrom
instead of making getDependencyFrom do it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60647 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-07 01:21:14 +00:00
Chris Lattner
106c6ca7b0 rename some variables for consistency
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60644 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-07 00:39:19 +00:00
Chris Lattner
fbc72e3e61 I love how using out of scope variables is not an error with GCC, no really I do.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60643 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-07 00:38:27 +00:00
Chris Lattner
8ef57c5faf Rename getCallSiteDependency -> getCallSiteDependencyFrom to
emphasize the scanning and make it more similar to 
getDependencyFrom
 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60642 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-07 00:35:51 +00:00
Chris Lattner
745291a6ce a memdep query on a volatile load/store will always return
clobber with the current implementation.  Instead of returning
a "precise clobber" just return a fuzzy one.  This doesn't 
matter to any clients anyway and should speed up analysis time
very very slightly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60641 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-07 00:28:02 +00:00
Chris Lattner
84b9a56d11 remove the ability to get memdep info for vaarg. I don't think the
original impl was correct and noone actually makes the query anyway.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60639 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-07 00:21:18 +00:00
Nick Lewycky
4a3136444e Minor cleanup. Use dyn_cast, not isa/cast pairs. No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60623 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-06 17:57:05 +00:00
Chris Lattner
b51deb929c Make a few major changes to memdep and its clients:
1. Merge the 'None' result into 'Normal', making loads
   and stores return their dependencies on allocations as Normal.
2. Split the 'Normal' result into 'Clobber' and 'Def' to
   distinguish between the cases when memdep knows the value is
   produced from when we just know if may be changed.
3. Move some of the logic for determining whether readonly calls
   are CSEs into memdep instead of it being in GVN.  This still
   leaves verification that the arguments are hte same to GVN to
   let it know about value equivalences in different contexts.
4. Change memdep's call/call dependency analysis to use 
   getModRefInfo(CallSite,CallSite) instead of doing something 
   very weak.  This only really matters for things like DSA, but
   someday maybe we'll have some other decent context sensitive
   analyses :)
5. This reimplements the guts of memdep to handle the new results.
6. This simplifies GVN significantly:
   a) readonly call CSE is slightly simpler
   b) I eliminated the "getDependencyFrom" chaining for load 
      elimination and load CSE doesn't have to worry about 
      volatile (they are always clobbers) anymore.
   c) GVN no longer does any 'lastLoad' caching, leaving it to 
      memdep.
7. The logic in DSE is simplified a bit and sped up.  A potentially
   unsafe case was eliminated.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60607 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-05 21:04:20 +00:00
Chris Lattner
6951381995 Make it illegal to call getDependency* on non-memory instructions
like binary operators.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60600 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-05 18:46:19 +00:00
Dale Johannesen
1bdd93a3dc Make the debugging dump be a full line.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60509 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-03 22:45:31 +00:00
Nick Lewycky
48dd644109 Add a new SCEV representing signed division.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60407 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-02 08:05:48 +00:00
Chris Lattner
bf145d6e2b Reimplement the non-local dependency data structure in terms of a sorted
vector instead of a densemap.  This shrinks the memory usage of this thing
substantially (the high water mark) as well as making operations like
scanning it faster.  This speeds up memdep slightly, gvn goes from
3.9376 to 3.9118s on 403.gcc

This also splits out the statistics for the cached non-local case to
differentiate between the dirty and clean cached case.  Here's the stats
for 403.gcc:

  6153 memdep - Number of dirty cached non-local responses
169336 memdep - Number of fully cached non-local responses
162428 memdep - Number of uncached non-local responses

yay for caching :)



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60313 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-01 01:15:42 +00:00
Chris Lattner
fd3dcbea06 Eliminate the DepResultTy abstraction. It is now completely
redundant with MemDepResult, and MemDepResult has a nicer interface.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60308 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30 23:17:19 +00:00
Chris Lattner
d777d405cd Cache TargetData/AliasAnalysis in the pass instead of calling
getAnalysis<>.  getAnalysis<> is apparently extremely expensive.
Doing this speeds up GVN on 403.gcc by 16%!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60304 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30 19:24:31 +00:00
Chris Lattner
4a69bade23 Two changes: Make getDependency remove QueryInst for a dirty record's
ReverseLocalDeps when we update it.  This fixes a regression test
failure from my last commit.

Second, for each non-local cached information structure, keep a bit that
indicates whether it is dirty or not.  This saves us a scan over the whole
thing in the common case when it isn't dirty.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60274 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30 02:52:26 +00:00
Chris Lattner
25f4b2b7a3 introduce a typedef, no functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60272 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30 02:30:50 +00:00
Chris Lattner
f68f310386 Change NonLocalDeps to be a densemap of pointers to densemap
instead of containing them by value.  This increases the density
(!) of NonLocalDeps as well as making the reallocation case 
faster.  This speeds up gvn on 403.gcc by 2% and makes room for
future improvements.

I'm not super thrilled with having to explicitly manage the new/delete
of the map, but it is necesary for the next change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60271 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30 02:28:25 +00:00
Chris Lattner
cfbb634225 calls never depend on allocations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60268 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30 01:44:00 +00:00
Chris Lattner
237a828745 Fix a fixme by making memdep's handling of allocations more logical.
If we see that a load depends on the allocation of its memory with no
intervening stores, we now return a 'None' depedency instead of "Normal".
This tweaks GVN to do its optimization with the new result.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60267 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30 01:39:32 +00:00
Chris Lattner
73ec3cdd71 implement a fixme by introducing a new getDependencyFromInternal
method that returns its result as a DepResultTy instead of as a
MemDepResult.  This reduces conversion back and forth.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60266 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30 01:26:32 +00:00
Chris Lattner
37d041c25f Move the getNonLocalDependency method to a more logical place in
the file, no functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60265 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30 01:18:27 +00:00
Chris Lattner
0e0a5b690c REmove an old fixme, resolve another fixme by adding liberal
comments about what this class does.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60264 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30 01:17:08 +00:00
Chris Lattner
125ce36269 remove a bit of incorrect code that tried to be tricky about speeding up
dependencies.  The basic situation was this: consider if we had:

  store1
  ...
  store2
  ...
  store3

Where memdep thinks that store3 depends on store2 and store2 depends 
on store1.  The problem happens when we delete store2: The code in 
question was updating dep info for store3 to be store1.  This is a
spiffy optimization, but is not safe at all, because aliasing isn't
transitive.  This bug isn't exposed today with DSE because DSE will only
zap store2 if it is identifical to store 3, and in this case, it is 
safe to update it to depend on store1.  However, memcpyopt is not so
fortunate, which is presumably why the "dropInstruction" code used to
exist.

Since this doesn't actually provide a speedup in practice, just rip the
code out.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60263 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30 01:09:30 +00:00
Chris Lattner
4f8c18c7c7 Eliminate the dropInstruction method, which is not needed any more.
Fix a subtle iterator invalidation bug I introduced in the last commit.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60258 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29 23:30:39 +00:00
Chris Lattner
0ec48ddef2 implement some fixme's: when deleting an instruction with
an entry in the nonlocal deps map, don't reset entries
referencing that instruction to [dirty, null], instead, set
them to [dirty,next] where next is the instruction after the
deleted one.  Use this information in the non-local deps
code to avoid rescanning entire blocks.

This speeds up GVN slightly by avoiding pointless work.  On
403.gcc this makes GVN 1.5% faster. 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60256 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29 22:02:15 +00:00
Chris Lattner
396a4a55e5 Change MemDep::getNonLocalDependency to return its results as
a smallvector instead of a DenseMap.  This speeds up GVN by 5%
on 403.gcc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60255 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29 21:33:22 +00:00
Chris Lattner
729b23758a move MemoryDependenceAnalysis::verifyRemoved to the end of the file,
no functionality/code change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60254 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29 21:25:10 +00:00
Chris Lattner
86b29ef64a reimplement getNonLocalDependency with a simpler worklist
formulation that is faster and doesn't require nonLazyHelper.
Much less code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60253 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29 21:22:42 +00:00
Chris Lattner
8c4652790e rename some maps.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60242 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29 09:20:15 +00:00
Chris Lattner
00314b3d84 rename some variables.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60241 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29 09:15:21 +00:00
Chris Lattner
a161ab06d9 eliminate a bunch of code in favor of using AliasAnalysis::getModRefInfo.
Put a some code back to handle buggy behavior that GVN expects: it wants
loads to depend on each other, and accesses to depend on their allocations.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60240 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29 09:09:48 +00:00
Chris Lattner
25a081439f simplify some code and rename some variables. Reduce nesting.
Use getTypeStoreSize instead of ABITypeSize for in-memory size
in a couple places.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60238 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29 08:51:16 +00:00
Chris Lattner
5391a1d804 Split getDependency into getDependency and getDependencyFrom, the
former does caching, the later doesn't.  This dramatically simplifies
the logic in getDependency and getDependencyFrom.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60234 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29 03:47:00 +00:00
Chris Lattner
7f52422a3c Now that DepType is private, we can start cleaning up some of its uses:
Document the Dirty value more precisely, use it for the uninitialized
DepResultTy value.  Change reverse mappings to be from an instruction*
instead of DepResultTy, and stop tracking other forms.  This makes it more
clear that we only care about the instruction cases.

Eliminate a DepResultTy,bool pair by using Dirty in the local case as well,
shrinking the map and simplifying the code.

This speeds up GVN by ~3% on 403.gcc.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60232 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29 03:22:12 +00:00
Chris Lattner
4c72400625 Introduce and use a new MemDepResult class to hold the results of a memdep
query.  This makes it crystal clear what cases can escape from MemDep that
the clients have to handle.  This also gives the clients a nice simplified
interface to it that is easy to poke at.

This patch also makes DepResultTy and MemoryDependenceAnalysis::DepType
private, yay.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60231 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29 02:29:27 +00:00
Chris Lattner
39f372e23e Reimplement the internal abstraction used by MemDep in terms
of a pointer/int pair instead of a manually bitmangled pointer.
This forces clients to think a little more about checking the 
appropriate pieces and will be useful for internal 
implementation improvements later.

I'm not particularly happy with this.  After going through this
I don't think that the clients of memdep should be exposed to
the internal type at all.  I'll fix this in a subsequent commit.

This has no functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60230 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29 01:43:36 +00:00
Chris Lattner
d3d12ecadd Fix PR3141 by ensuring that MemoryDependenceAnalysis::removeInstruction
properly updates the reverse dependency map when it installs updated 
dependencies for instructions that depend on the removed instruction.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60222 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-28 22:51:08 +00:00
Chris Lattner
baad8881f1 more cleanups for MemoryDependenceAnalysis::removeInstruction,
no functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60219 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-28 22:28:27 +00:00
Chris Lattner
5f589dc77f random cleanups, no functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60218 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-28 22:04:47 +00:00
Chris Lattner
0e575f428c Run verifyRemoved from removeInstruction when -debug is specified.
This shows the root problem behind PR3141.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60216 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-28 21:45:17 +00:00
Chris Lattner
8b589fa135 rename "ping" to "verifyRemoved". I don't know why 'ping' what chosen,
but it doesn't make any sense at all.

Also make the method const, private, and fit in 80 cols while we're at it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60215 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-28 21:42:09 +00:00
Chris Lattner
57d4012f65 remove mysterious escaped newlines.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60211 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-28 21:16:44 +00:00
Nick Lewycky
b2b32fd3fe Seriously strengthen the guarantee offered by noalias on a function's return
value. It must now be as if the pointer were allocated and has not escaped to
the caller. Thanks to Dan Gohman for pointing out the error in the original
and helping devise this definition.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59940 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-24 05:00:44 +00:00
Nick Lewycky
02ff308aa1 Extend the 'noalias' attribute to function return values. This is intended to
indicate functions that allocate, such as operator new, or list::insert. The
actual definition is slightly less strict (for now).

No changes to the bitcode reader/writer, asm printer or verifier were needed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59934 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-24 03:41:24 +00:00
Chris Lattner
824b958e6f reapply Sanjiv's patch to genericize memcpy/memset/memmove to take an
arbitrary integer width for the count.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59823 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-21 16:42:48 +00:00
Bill Wendling
dc770929cb Revert r59802. It was breaking the build of llvm-gcc:
g++ -m32 -c -g -DIN_GCC -W -Wall -Wwrite-strings -Wmissing-format-attribute -fno-common -mdynamic-no-pic -DHAVE_CONFIG_H -Wno-unused -DTARGET_NAME=\"i386-apple-darwin9.5.0\" -I. -I. -I../../llvm-gcc.src/gcc -I../../llvm-gcc.src/gcc/. -I../../llvm-gcc.src/gcc/../include -I./../intl -I../../llvm-gcc.src/gcc/../libcpp/include  -I../../llvm-gcc.src/gcc/../libdecnumber -I../libdecnumber -I/Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvm.obj/include -I/Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvm.src/include -DENABLE_LLVM -I/Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvm.obj/../llvm.src/include  -D_DEBUG  -D_GNU_SOURCE -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS   -I. -I. -I../../llvm-gcc.src/gcc -I../../llvm-gcc.src/gcc/. -I../../llvm-gcc.src/gcc/../include -I./../intl -I../../llvm-gcc.src/gcc/../libcpp/include  -I../../llvm-gcc.src/gcc/../libdecnumber -I../libdecnumber -I/Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvm.obj/include -I/Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvm.src/include ../../llvm-gcc.src/gcc/llvm-types.cpp -o llvm-types.o
../../llvm-gcc.src/gcc/llvm-convert.cpp: In member function 'void TreeToLLVM::EmitMemCpy(llvm::Value*, llvm::Value*, llvm::Value*, unsigned int)':
../../llvm-gcc.src/gcc/llvm-convert.cpp:1496: error: 'memcpy_i32' is not a member of 'llvm::Intrinsic'
../../llvm-gcc.src/gcc/llvm-convert.cpp:1496: error: 'memcpy_i64' is not a member of 'llvm::Intrinsic'
../../llvm-gcc.src/gcc/llvm-convert.cpp: In member function 'void TreeToLLVM::EmitMemMove(llvm::Value*, llvm::Value*, llvm::Value*, unsigned int)':
../../llvm-gcc.src/gcc/llvm-convert.cpp:1512: error: 'memmove_i32' is not a member of 'llvm::Intrinsic'
../../llvm-gcc.src/gcc/llvm-convert.cpp:1512: error: 'memmove_i64' is not a member of 'llvm::Intrinsic'
../../llvm-gcc.src/gcc/llvm-convert.cpp: In member function 'void TreeToLLVM::EmitMemSet(llvm::Value*, llvm::Value*, llvm::Value*, unsigned int)':
../../llvm-gcc.src/gcc/llvm-convert.cpp:1528: error: 'memset_i32' is not a member of 'llvm::Intrinsic'
../../llvm-gcc.src/gcc/llvm-convert.cpp:1528: error: 'memset_i64' is not a member of 'llvm::Intrinsic'
make[3]: *** [llvm-convert.o] Error 1
make[3]: *** Waiting for unfinished jobs....
rm fsf-funding.pod gcov.pod gfdl.pod cpp.pod gpl.pod gcc.pod
make[2]: *** [all-stage1-gcc] Error 2
make[1]: *** [stage1-bubble] Error 2
make: *** [all] Error 2



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59809 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-21 09:09:41 +00:00
Sanjiv Gupta
219ab405e6 Make mem[cpy,move,set] intrinsics overloaded.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59802 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-21 07:49:09 +00:00
Nick Lewycky
d433904982 undef beats zero. Fix this missed optimization opportunity. Patch by Matt Elder!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59705 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-20 04:36:13 +00:00
Nick Lewycky
dd643f26c4 Add a utility function that detects whether a loop is guaranteed to be finite.
Use it to safely handle less-than-or-equals-to exit conditions in loops. These
also occur when the loop exit branch is exit on true because SCEV inverses the
icmp predicate.

Use it again to handle non-zero strides, but only with an unsigned comparison
in the exit condition.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59528 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-18 15:10:54 +00:00
Duncan Sands
130fea2ca0 Remove unused variable.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59515 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-18 10:39:04 +00:00
Nick Lewycky
d72a81ee64 Don't brute-force analyze cubic or higher polynomials.
If this patch causes a performance regression for anyone, please let me know,
and it can be fixed in a different way with much more effort.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59384 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-16 04:14:25 +00:00
Devang Patel
89d0a4dd84 Silence unused variable warning.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59064 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-11 19:17:41 +00:00
Chris Lattner
497a7a81a8 Move getCastToEmpty out of DIDescriptor into DIFactory. It is an
implementation detail of DIFactory anyway, and this allows it to avoid
recomputing the same type over and over.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58960 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-10 04:10:34 +00:00
Chris Lattner
903361e509 add new file
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58955 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-10 02:58:28 +00:00
Chris Lattner
a45664f709 Add a new set of helper classes for creating and reading debug
information.  This logically replaces the "Desc" classes in
MachineModuleInfo.  Nice features of these classes are that they:

1. Are much more efficient than MMI because they don't create a 
   temporary parallel data structure for debug info that has to be
   'serialized' and 'deserialized' into/out of the module.
2. These provide a much cleaner abstraction for debug info than 
   MMI, which will make it easier to change the implementation in 
   the future (to be MDNode-based).
3. These are much easier to use than the MMI interfaces, requiring
   a lot less code in the front-ends.
4. These can be used to both create (for frontends) and read (for
   codegen) debug information.  DebugInfoBuilder can only be used
   to create the nodes.

So far, this is implemented just enough to support the debug info
generation needs of clang.  This can and should be extended to 
support the full set of debug info constructs, and we should switch
llvm-gcc and llc over to using this in the near future.

This code also has a ton of FIXMEs in it, because the way we 
currently represent debug info in LLVM IR is basically insane in a
variety of details.  This sort of issue should be fixed when we
eventually reimplement debug info on top of MDNodes.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58954 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-10 02:56:27 +00:00
Nick Lewycky
8f4d5eb9e5 Don't crash analyzing certain quadratics (addrec of {X,+,Y,+,1}).
We're still waiting on code that actually analyzes them properly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58592 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-03 02:43:49 +00:00
David Greene
c714f13090 Re-apply 55137 with fixes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58296 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-27 23:24:03 +00:00
Torok Edwin
c83889ad90 Avoid crashing if instruction is not part of a loop.
If it is not part of a loop it is obviously invariant wrt to all loops.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58240 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-27 10:18:45 +00:00
Nick Lewycky
04aa2c3520 Don't try to create a mask when we don't need one. Fixes a crash.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58075 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-24 06:14:27 +00:00
Dan Gohman
f522068412 Trim #includes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57649 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-16 20:18:31 +00:00
Duncan Sands
ddbe5cbb10 Fix "large integer implicitly truncated to unsigned type"
warning on x86-64 with gcc-4.3.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57634 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-16 09:14:58 +00:00
Gabor Greif
e9324f3605 do not use deprecated interfaces
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57433 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-13 10:21:17 +00:00
Nick Lewycky
cb8f1b5b8b Disallow the construction of SCEVs with could-not-compute operands. Catch CNCs
returned by BinomialCoefficient and don't try to operate with them. This
replaces the previous fix for PR2857.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57431 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-13 03:58:02 +00:00
Owen Anderson
b5cf048fdf Add special-case code to allow null-guards on calls to malloc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57413 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-12 08:10:46 +00:00
Owen Anderson
4b089929b4 Make Escape Analysis work for any pointer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57412 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-12 07:33:29 +00:00
Owen Anderson
5efff7735d Fix crashes and infinite loops.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57408 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-12 06:03:38 +00:00
Owen Anderson
4382f62a05 Duncan convinced me that it's not possible to transform control-based escapes into
data-based ones.  Just be conservative when analyzing control-based escapes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57400 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-12 03:59:45 +00:00
Oscar Fuentes
fc62ffc154 CMake: updated lib/Analysis/CMakeLists.txt.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57357 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-10 18:51:36 +00:00
Owen Anderson
8f28c78e95 Add a basic intra-procedural escape analysis. This hasn't be extensively tested yet, but feedback is welcome.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57342 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-10 08:36:25 +00:00
Nick Lewycky
26e4b216c0 Allow the construction of SCEVs with SCEVCouldNotCompute operands, by
implementing folding. Fixes PR2857.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57049 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-04 11:19:07 +00:00
Duncan Sands
a2582da44d Teach internalize to preserve the callgraph.
Why?  Because it was there!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56996 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-03 07:36:09 +00:00
Duncan Sands
5d0392c6b3 Factorize code: remove variants of "strip off
pointer bitcasts and GEP's", and centralize the
logic in Value::getUnderlyingObject.  The
difference with stripPointerCasts is that
stripPointerCasts only strips GEPs if all
indices are zero, while getUnderlyingObject
strips GEPs no matter what the indices are.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56922 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-01 15:25:41 +00:00
Devang Patel
eaf42abab6 s/ParameterAttributes/Attributes/g
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56513 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-23 23:03:40 +00:00
Duncan Sands
3ee8fc9649 Rationalize the names of passes that print information:
-callgraph => print-callgraph
    -callscc   => print-callgraph-sccs
    -cfgscc    => print-cfg-sccs
    -externalfnconstants => print-externalfnconstants
    -print               => print-function
    -print-alias-sets (no change)
    -print-callgraph     => dot-callgraph
    -print-cfg           => dot-cfg
    -print-cfg-only      => dot-cfg-only
    -print-dom-info (no change)
    -printm              => print-module
    -printusedtypes      => print-used-types


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56487 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-23 12:47:39 +00:00
Oscar Fuentes
3d01fc7de8 Initial support for the CMake build system.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56419 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-22 01:08:49 +00:00
Dan Gohman
70ff4cf1ba Finally re-apply r46959. This is made feasible by the combination
of r56230, r56232, and r56246.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56247 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-16 18:52:57 +00:00
Dan Gohman
81b28ceab6 Improve instcombine's handling of integer min and max in two ways:
- Recognize expressions like "x > -1 ? x : 0" as min/max and turn them
   into expressions like "x < 0 ? 0 : x", which is easily recognizable
   as a min/max operation.
 - Refrain from folding expression like "y/2 < 1" to "y < 2" when the
   comparison is being used as part of a min or max idiom, like
   "y/2 < 1 ? 1 : y/2". In that case, the division has another use, so
   folding doesn't eliminate it, and obfuscates the min/max, making it
   harder to recognize as a min/max operation.

These benefit ScalarEvolution, CodeGen, and anything else that wants to
recognize integer min and max.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56246 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-16 18:46:06 +00:00
Dan Gohman
fd6edef87b Teach ScalarEvolution to consider loop preheaders in the search for
an if statement that guards a loop, to allow indvars to avoid smax
operations in more situations.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56232 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-15 22:18:04 +00:00
Dan Gohman
8dae138d06 Fix WriteAsOperand to not emit a leading space character. Adjust
its callers to emit a space character before calling it when a
space is needed.

This fixes several spurious whitespace issues in
ScalarEvolution's debug dumps. See the test changes for
examples.

This also fixes odd space-after-tab indentation in the output
for switch statements, and changes calls from being printed like
this:
  call void @foo( i32 %x )
to this:
  call void @foo(i32 %x)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56196 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-14 17:21:12 +00:00
Duncan Sands
b8ca4ff643 Fix PR2792: treat volatile loads as writing memory somewhere.
Treat stores as reading memory, just to play safe.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56188 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-13 12:45:50 +00:00
Duncan Sands
2bb4a4d315 Rather than marking all internal globals "Ref"
when a readonly declaration is called, set a
flag.  This is faster and uses less memory.
In theory it is less accurate, because before
only those internal globals that were read
by someone were being marked "Ref", but now
all are.  But in practice, thanks to other
passes, all internal globals of the kind
considered here will be both read and stored
to: those only read will have been turned
into constants, and those only stored to will
have been deleted.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56143 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-12 07:29:58 +00:00
Duncan Sands
af8bc26449 Fix comment typo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56116 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-11 19:41:10 +00:00
Duncan Sands
892b84007c Intrinsics don't touch internal global variables
(unless passed one via a parameter), even if they
are IntrWriteMem.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56115 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-11 19:35:55 +00:00