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aecb9a4040
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1177 Commits

Author SHA1 Message Date
Chris Lattner
aecb9a4040 Fix a pretty serious misfeature of the inliner: if it inlines a function 
with multiple return values it inserts a PHI to merge them all together.
However, if the return values are all the same, it ends up with a pointless
PHI and this pointless PHI happens to really block SRoA from happening in 
at least a silly C++ example written by Doug, but probably others.  This 
fixes rdar://7339069.

llvm-svn: 85206
 2009-10-27 05:39:41 +00:00
Victor Hernandez
6c86b93663 Rename MallocHelper as MallocFreeHelper, since it now also identifies calls to free() 
llvm-svn: 85181
 2009-10-26 23:58:56 +00:00
Victor Hernandez
673c036bc7 Remove FreeInst. 
Remove LowerAllocations pass.
Update some more passes to treate free calls just like they were treating FreeInst.

llvm-svn: 85176
 2009-10-26 23:43:48 +00:00
Nick Lewycky
2b8400628d Remove includes of Support/Compiler.h that are no longer needed after the 
VISIBILITY_HIDDEN removal.

llvm-svn: 85043
 2009-10-25 06:57:41 +00:00
Nick Lewycky
711c726c97 Remove VISIBILITY_HIDDEN from class/struct found inside anonymous namespaces. 
Chris claims we should never have visibility_hidden inside any .cpp file but
that's still not true even after this commit.

llvm-svn: 85042
 2009-10-25 06:33:48 +00:00
Dan Gohman
07044648b2 MapValue doesn't needs its LLVMContext argument. 
llvm-svn: 85020
 2009-10-24 23:37:16 +00:00
Victor Hernandez
e8998896f5 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.

llvm-svn: 84987
 2009-10-24 04:23:03 +00:00
Chris Lattner
803539f022 alternate fix for PR5258 which avoids worklist problems, with reduced testcase. 
llvm-svn: 84667
 2009-10-20 20:27:49 +00:00
Torok Edwin
bdcd45a9d6 Fix PR5258, jump-threading creating invalid PHIs. 
When an incoming value for a PHI is updated, we must also updated all other
incoming values for the same BB to match, otherwise we create invalid PHIs.

llvm-svn: 84638
 2009-10-20 15:42:00 +00:00
Dan Gohman
d2e75c9ae0 Fix SplitBlockPredecessors' LoopInfo updating code to handle the case 
where a loop's header is being split and it has predecessors which are not
contained by the most-nested loop which contains the loop.
This fixes PR5235.

llvm-svn: 84505
 2009-10-19 16:04:50 +00:00
Dan Gohman
595545d2e7 Change instnamer to name arguments "arg" instead of "tmp" for clarity, and 
to name basic blocks "bb" instead of "BB", for consistency.

llvm-svn: 84502
 2009-10-19 14:47:32 +00:00
Chris Lattner
7f32b72975 Simplify some code (first hunk) and fix PR5208 (second hunk) by 
updating the callgraph when introducing a call.

llvm-svn: 84310
 2009-10-17 05:39:39 +00:00
Victor Hernandez
a25a2890fa Remove MallocInst from LLVM Instructions. 
llvm-svn: 84299
 2009-10-17 01:18:07 +00:00
Duncan Sands
4cde5474aa Strip trailing white space. 
llvm-svn: 84256
 2009-10-16 15:20:13 +00:00
Ted Kremenek
dd5d38175d Update CMake file. 
llvm-svn: 84001
 2009-10-13 18:48:07 +00:00
Dan Gohman
81218aa90e Commit the removal of this file, which is now moved to lib/Analysis. 
llvm-svn: 83999
 2009-10-13 18:37:20 +00:00
Dan Gohman
f277c57aad Start refactoring the inline cost estimation code so that it can be used 
for purposes other than inlining.

llvm-svn: 83997
 2009-10-13 18:24:11 +00:00
Chris Lattner
26c670aa44 change simplifycfg to not duplicate 'unwind' instructions. Hopefully 
this will increase the likelihood of common code getting sunk towards
the unwind.

llvm-svn: 83996
 2009-10-13 18:13:05 +00:00
Chris Lattner
8b521613d3 rewrite LCSSA to use SSAUpdate, to only return true if it modifies 
the IR, and to implement the FIXME'd optimization.

llvm-svn: 83748
 2009-10-11 02:53:37 +00:00
Chris Lattner
1b8c1d1d29 clean up and simplify some code. Don't use setvector when things will be 
inserted only once, just use vector.  Don't compute ExitBlocks unless we
need it, change std::sort to array_pod_sort.

llvm-svn: 83747
 2009-10-11 01:07:15 +00:00
Chris Lattner
0aa320ae4d add a simple helper method. 
llvm-svn: 83745
 2009-10-10 23:41:48 +00:00
Chris Lattner
acf73d9839 add ability for clients of SSAUpdater to find out about the 
PHI nodes inserted.

llvm-svn: 83744
 2009-10-10 23:15:24 +00:00
Chris Lattner
db4d523cca add the ability to get a rewritten value from the middle of a block, 
not just at the end.  Add a big comment explaining when this could
be useful (which never happens for jump threading).

llvm-svn: 83741
 2009-10-10 23:00:11 +00:00
Chris Lattner
9899ce267c rename GetValueInBlock -> GetValueAtEndOfBlock to better reflect 
what it does.

llvm-svn: 83740
 2009-10-10 22:41:58 +00:00
Chris Lattner
0561804097 use a typedef instead of spelling out an insane type. Yay for auto someday. 
llvm-svn: 83707
 2009-10-10 09:09:20 +00:00
Chris Lattner
9c5aa00411 Implement an efficient and fully general SSA update mechanism that 
works on unstructured CFGs.  This implements PR217, our oldest open PR.

llvm-svn: 83705
 2009-10-10 09:04:27 +00:00
Chris Lattner
317eb8ff20 random tidying 
llvm-svn: 83701
 2009-10-10 06:22:45 +00:00
Dale Johannesen
7691b73da0 Use names instead of numbers for some of the magic 
constants used in inlining heuristics (especially
those used in more than one file).  No functional change.

llvm-svn: 83675
 2009-10-09 21:42:02 +00:00
Eric Christopher
e6bebc66a7 Add FreeInst to the "is a call" check for Insts that are calls, but 
not intrinsics.

llvm-svn: 83441
 2009-10-07 00:54:08 +00:00
Eric Christopher
8720c9ca69 While we still have a MallocInst treat it as a call like any other 
for inlining.

When MallocInst goes away this code will be subsumed as part of
calls and work just fine...

llvm-svn: 83434
 2009-10-07 00:02:18 +00:00
Duncan Sands
2400ad7236 Introduce and use convenience methods for getting pointer types 
where the element is of a basic builtin type.  For example, to get
an i8* use getInt8PtrTy.

llvm-svn: 83379
 2009-10-06 15:40:36 +00:00
Dan Gohman
176e47a413 Remove an unnnecessary LLVMContext argument in 
ConstantFoldLoadThroughGEPConstantExpr.

llvm-svn: 83311
 2009-10-05 16:36:26 +00:00
Owen Anderson
412df08b59 Do away with the strange use of BitVectors in SSI, and just use normal sets. This makes the code much more C++/LLVM-ish. 
llvm-svn: 83286
 2009-10-04 18:49:55 +00:00
Owen Anderson
cadab85644 Fix a typo in the comment. 
llvm-svn: 83283
 2009-10-04 17:52:13 +00:00
Owen Anderson
18cecec6a0 SSI needs to require DT and DF transitively, since it uses them outside of its runOnFunction. 
Similarly, it can be marked setPreservesAll, since it does no work in its runOnFunction.

llvm-svn: 83282
 2009-10-04 17:47:39 +00:00
Dan Gohman
2ecc146f0c Fix this code so that it doesn't try to iterate through a std::vector 
while calling changeImmediateDominator, which removes elements from the
vector. This fixes PR5097.

llvm-svn: 83166
 2009-09-30 20:54:16 +00:00
Dan Gohman
9776ad2192 Remove a redundant #ifndef and add an assertion string. 
llvm-svn: 82991
 2009-09-28 14:38:19 +00:00
Dan Gohman
f31dae3931 Convert LoopSimplify and LoopExtractor from FunctionPass to LoopPass. 
llvm-svn: 82990
 2009-09-28 14:37:51 +00:00
Chris Lattner
bb29bb4e16 calls are already handled, malloc doesn't need a special case. 
llvm-svn: 82931
 2009-09-27 21:33:46 +00:00
Nick Lewycky
d21c325f09 Instruction::clone does not need to take an LLVMContext&. Remove that and 
update all the callers.

llvm-svn: 82889
 2009-09-27 07:38:41 +00:00
Dale Johannesen
1b76c2ca48 A minor improvment in accuracy to inline cost 
computation, and some cosmetics.

llvm-svn: 82660
 2009-09-23 22:05:24 +00:00
Chris Lattner
f5afe18457 tidy up 
llvm-svn: 82488
 2009-09-21 22:26:02 +00:00
Victor Hernandez
fe5347d782 Enhance transform passes so that they apply the same tranforms to malloc calls as to MallocInst. 
Reviewed by Dan Gohman.

llvm-svn: 82300
 2009-09-18 22:35:49 +00:00
Victor Hernandez
065bc44d01 Update malloc call creation code (AllocType is now the element type of the malloc, not the resulting type). 
In getMallocArraySize(), fix bug in the case that array size is the product of 2 constants.

Extend isArrayMalloc() and getMallocArraySize() to handle case where malloc is used as char array.

Ensure that ArraySize in LowerAllocations::runOnBasicBlock() is correct type.

Extend Instruction::isSafeToSpeculativelyExecute() to handle malloc calls.

Add verification for malloc calls.

Reviewed by Dan Gohman.

llvm-svn: 82257
 2009-09-18 19:20:02 +00:00
Andreas Neustifter
3c9b4c4c75 Preserve ProfileInfo during CodeGenPrepare. 
llvm-svn: 82034
 2009-09-16 09:26:52 +00:00
Nick Lewycky
d347108b4d Correctly handle the case where a comparison is created in one BasicBlock and 
used by a terminator in another.

llvm-svn: 81437
 2009-09-10 07:02:09 +00:00
Evan Cheng
78182244f1 Add malloc call utility functions. Patch by Victor Hernandez. 
llvm-svn: 81426
 2009-09-10 04:36:43 +00:00
Dan Gohman
0357e0117e Fix SplitCriticalEdge to properly update LCSSA form when splitting a 
loop exit edge -- new PHIs may be needed not only for the additional
splits that are made to preserve LoopSimplify form, but also for the
original split. Factor out the code that inserts new PHIs so that it
can be used for both. Remove LoopRotation.cpp's code for manually
updating LCSSA form, as it is now redundant. This fixes PR4934.

llvm-svn: 81363
 2009-09-09 18:18:18 +00:00
Andreas Neustifter
e4a3a33579 Preserve ProfileInfo. 
llvm-svn: 81360
 2009-09-09 17:53:39 +00:00
Dan Gohman
cdaa08e706 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.

llvm-svn: 81221
 2009-09-08 15:45:00 +00:00