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Author SHA1 Message Date
Chris Lattner
e09e98c2de fix PHI translation to take the PHI out of the instinputs set and add 
the translated value back to it if an instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90909 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-09 00:18:13 +00:00
Chris Lattner
af50315a29 instructions defined in CurBB may be intermediate nodes of the computation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90908 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-09 00:10:55 +00:00
Chris Lattner
7dedbf4ce3 add dumping and sanity checking support. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90906 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-09 00:01:00 +00:00
Dan Gohman
8456d60bec Put a threshold on the number of users PointerMayBeCaptured 
examines; fall back to a conservative answer if there are
more. This works around some several compile time problems
resulting from BasicAliasAnalysis calling PointerMayBeCaptured.

The value has been chosen arbitrarily.

This fixes rdar://7438917 and may partially address PR5708.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90905 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-08 23:59:12 +00:00
Chris Lattner
43678f41a3 make sure that PHITransAddr keeps its 'InstInputs' list up to 
date when instsimplify kicks in.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90901 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-08 23:42:51 +00:00
Devang Patel
0000fadb00 Revert 90858 90875 and 90805 for now. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90898 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-08 23:21:45 +00:00
Chris Lattner
34f849098b fix a typo (and -> add) and fix GetAvailablePHITranslatedSubExpr to not 
side-effect the current object.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90837 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-08 06:06:26 +00:00
Victor Hernandez
c59b33562c Rename DIFactory::InsertValue() as DIFactory::InsertDbgValueIntrinsic() 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90807 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-07 21:54:43 +00:00
Devang Patel
4063f6bcc7 Add support to emit debug info for c++ style namespaces. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90805 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-07 21:41:32 +00:00
Chris Lattner
6045417fcc fix typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90793 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-07 19:52:57 +00:00
Chris Lattner
e05a188cd6 add accessor, improve comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90792 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-07 19:45:30 +00:00
Victor Hernandez
2f9dac721d Introduce the "@llvm.dbg.value" debug intrinsic. 
The semantics of llvm.dbg.value are that starting from where it is executed, an offset into the specified user source variable is specified to get a new value.

An example:
  call void @llvm.dbg.value(metadata !{ i32 7 }, i64 0, metadata !2)
Here the user source variable associated with metadata #2 gets the value "i32 7" at offset 0.
 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90788 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-07 19:36:34 +00:00
Chris Lattner
6fcca1cc87 add support for phi translation and incorpation of new expression. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90782 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-07 19:04:49 +00:00
Chris Lattner
9a8641201b checkpoint of the new PHITransAddr code, still not done and not used by 
anything.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90779 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-07 18:36:53 +00:00
Nick Lewycky
93d3311d1f Fix indentation in switch statement. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90650 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-05 06:37:24 +00:00
Chris Lattner
44a7a380aa Fix PR5551 by not ignoring the top level constantexpr when 
folding a load from constant.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90545 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-04 06:29:29 +00:00
Chris Lattner
bbf9a5845a add to cmake 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90539 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-04 04:15:36 +00:00
Chris Lattner
210e45af3a add the start of a class used to handle phi translation in memdep and 
gvn (this is just a skeleton so far).  This will ultimately be used
to fix a nasty miscompilation with GVN.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90518 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-04 02:10:16 +00:00
Bob Wilson
eb35699e64 Fix a comment typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90511 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-04 01:33:04 +00:00
Devang Patel
5d11eb0ed5 Add support to emit debug info for virtual functions and virtual base classes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90474 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-03 19:11:07 +00:00
Benjamin Kramer
88a91b579b Fix MSVC build. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90454 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-03 13:23:03 +00:00
Andreas Neustifter
8c30abec6d Convert ProfileVerifier to template so it can be used for different types of ProfileInfo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90451 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-03 12:55:57 +00:00
Andreas Neustifter
1640f7e033 Do not create negative edge weights in ProfileEstimator. 
Use integer values for weights to prevent rounding errors.
Make ProfileEstimator more robust in general CFGs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90449 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-03 12:41:14 +00:00
Andreas Neustifter
44299c9507 Use ProfileInfo-API in ProfileInfo Loader and do more assertions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90446 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-03 11:00:37 +00:00
Andreas Neustifter
e2baf6b455 Converted ProfileInfo to template, added more API for ProfileInfo-preserving. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90445 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-03 09:30:12 +00:00
Chris Lattner
e568fa2d29 fix PR5673 by being more careful about pointers to functions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90369 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-03 01:05:45 +00:00
Chris Lattner
7896c9f436 improve portability to avoid conflicting with std::next in c++'0x. 
Patch by Howard Hinnant!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90365 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-03 00:50:42 +00:00
Benjamin Kramer
0fea11a805 Silence compiler warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90319 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-02 15:33:44 +00:00
Owen Anderson
9ff5a23186 Cleanup/remove some parts of the lifetime region handling code in memdep and GVN, 
per Chris' comments.  Adjust testcases to match.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90304 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-02 07:35:19 +00:00
Mon P Wang
69a008075b Fixed an assertion failure for tracking sext of a vector of integers 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90290 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-02 04:59:58 +00:00
Devang Patel
e3a18de4f6 Add utility routine to create subprogram definition entry from subprogram declaration entry. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90282 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-01 23:09:02 +00:00
Chris Lattner
1e8de49fe7 rename some variables. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90258 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-01 21:16:01 +00:00
Chris Lattner
1ffb70f21d tidy 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90257 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-01 21:15:15 +00:00
Chris Lattner
855d9da596 fix 255.vortex again, third time's the charm. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90217 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-01 07:33:32 +00:00
Tobias Grosser
56f4ef3232 Remove ShortNames from getNodeLabel in DOTGraphTraits 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90134 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-30 12:38:47 +00:00
Tobias Grosser
a10d598602 Instantiate DefaultDOTGraphTraits 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90133 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-30 12:38:13 +00:00
Tobias Grosser
2833fac273 Small PostDominatorTree improvements 
* Do not SEGFAULT if tree entryNode() is NULL
 * Print function names in dotty printer

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90130 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-30 12:06:37 +00:00
Nick Lewycky
f58e86d762 Revert r90107, fixing test/Transforms/GVN/2009-11-29-ReverseMap.ll and the 
llvm-gcc build.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90113 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-30 07:05:51 +00:00
Chris Lattner
366429b400 reapply r90093 with an addition of keeping the forward 
and reverse nonlocal memdep maps in synch, this should
fix 255.vortex.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90107 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-30 02:26:29 +00:00
Nick Lewycky
fac554a131 Teach ConstantFolding to do a better job when folding gep(bitcast). 
This permits the devirtualization of llvm.org/PR3100#c9 when compiled by clang.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90099 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-29 21:40:55 +00:00
Chris Lattner
ae3d24880d revert this patch for now, it causes failures of: 
LLVM::Transforms/GVN/2009-02-17-LoadPRECrash.ll
    LLVM::Transforms/GVN/2009-06-17-InvalidPRE.ll



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90096 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-29 21:14:59 +00:00
Chris Lattner
1903d97c2c Fix a really nasty caching bug I introduced in memdep. An entry 
was being added to the Result vector, but not being put in the
cache.  This means that if the cache was reused wholesale for a
later query that it would be missing this entry and we'd do an
incorrect load elimination.

Unfortunately, it's not really possible to write a useful 
testcase for this, but this unbreaks 255.vortex.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90093 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-29 21:09:36 +00:00
Nick Lewycky
2eac9493fc Detabify. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90085 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-29 18:10:39 +00:00
Nick Lewycky
d801c10de6 Teach memdep to look for memory use intrinsics during dependency queries. Fixes 
PR5574.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90045 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-28 21:27:49 +00:00
Chris Lattner
dd696052f0 Enhance InsertPHITranslatedPointer to be able to return a list of newly 
inserted instructions.  No functionality change until someone starts using it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90039 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-28 15:39:14 +00:00
Chris Lattner
ab9530ee5d implement a FIXME: limit the depth that DecomposeGEPExpression goes the same 
way that getUnderlyingObject does it. 

This fixes the 'DecomposeGEPExpression and getUnderlyingObject disagree!' 
assertion on sqlite3.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90038 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-28 15:12:41 +00:00
Chris Lattner
af7a28939e enable code to handle un-phi-translatable cases more aggressively: 
if we don't have an address expression available in a predecessor,
then model this as the value being clobbered at the end of the pred
block instead of being modeled as a complete phi translation failure.
This is important for PRE of loads because we want to see that the
load is available in all but this predecessor, and complete phi
translation failure results in not getting any information about
predecessors.

This doesn't do anything until I renable code insertion since PRE
now sees that it is available in all but one predecessors, but can't
insert the addressing in the predecessor that is missing it to 
eliminate the redundancy.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90037 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-28 14:54:10 +00:00
Chris Lattner
6f7b210b25 Rework InsertPHITranslatedPointer to handle the recursive case, this 
fixes PR5630 and sets the stage for the next phase of goodness (testcase
pending).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90019 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 22:05:15 +00:00
Chris Lattner
5141421e38 recursively phi translate bitcast operands too, for consistency. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90016 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 20:25:30 +00:00
Chris Lattner
11c6bab704 add support for recursive phi translation and phi 
translation of add with immediate.  This allows us
to optimize this function:

void test(int N, double* G) {
  long j;
  G[1] = 1;
    for (j = 1; j < N - 1; j++)
        G[j+1] = G[j] + G[j+1];
}

to only do one load every iteration of the loop.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90013 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 19:11:31 +00:00
Chris Lattner
8aee8efc0c factor some logic out of instcombine into a new SimplifyAddInst method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90011 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 17:42:22 +00:00
Chris Lattner
9763487bd5 add comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90002 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 08:40:14 +00:00
Chris Lattner
e95035aea4 reduce nesting, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90001 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 08:37:22 +00:00
Chris Lattner
a650f770d4 limit the recursion depth of GetLinearExpression. This 
fixes a crash analyzing consumer-lame, which had an "%X = add %X, 1"
in unreachable code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90000 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 08:32:52 +00:00
Chris Lattner
616613d7a4 teach GVN's load PRE to insert computations of the address in predecessors 
where it is not available.  It's unclear how to get this inserted 
computation into GVN's scalar availability sets, Owen, help? :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89997 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 08:25:10 +00:00
Chris Lattner
62deff066c Fix phi translation in load PRE to agree with the phi 
translation done by memdep, and reenable gep translation 
again.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89992 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 06:31:14 +00:00
Chris Lattner
b99be5beac redisable this, my bootstrap worked because it wasn't an optimized build, whoops. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89991 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 05:53:01 +00:00
Chris Lattner
cca130bb66 try again. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89990 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 05:19:56 +00:00
Chris Lattner
518c988ae9 this is causing buildbot failures, disable for now. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89985 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 01:52:22 +00:00
Chris Lattner
e19e4baf3b teach phi translation of GEPs to simplify geps like 'gep x, 0'. 
This allows us to compile the example from PR5313 into:

LBB1_2:                                                     ## %bb
	incl	%ecx
	movb	%al, (%rsi)
	movslq	%ecx, %rax
	movb	(%rdi,%rax), %al
	testb	%al, %al
	jne	LBB1_2

instead of:

LBB1_2:                                                     ## %bb
	movslq	%eax, %rcx
	incl	%eax
	movb	(%rdi,%rcx), %cl
	movb	%cl, (%rsi)
	movslq	%eax, %rcx
	cmpb	$0, (%rdi,%rcx)
	jne	LBB1_2



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89981 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 00:34:38 +00:00
Chris Lattner
c514c1f521 factor some instcombine simplifications for getelementptr out to a new 
SimplifyGEPInst method in InstructionSimplify.h.  No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89980 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 00:29:05 +00:00
Chris Lattner
304076268a teach memdep to do trivial PHI translation of GEPs. More to 
come.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89979 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 00:07:37 +00:00
Chris Lattner
cc3d0eb483 Teach memdep to phi translate bitcasts. This allows us to compile 
the example in GCC PR16799 to:

LBB1_2:                                                     ## %bb1
	movl	%eax, %eax
	subq	%rax, %rdi
	movq	%rdi, (%rcx)
	movl	(%rdi), %eax
	testl	%eax, %eax
	je	LBB1_2

instead of:

LBB1_2:                                                     ## %bb1
	movl	(%rdi), %ecx
	subq	%rcx, %rdi
	movq	%rdi, (%rax)
	cmpl	$0, (%rdi)
	je	LBB1_2



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89978 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 23:41:07 +00:00
Chris Lattner
dc59311c5c factor some code out into some helper functions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89975 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 23:18:49 +00:00
Chris Lattner
1ce0eaa25f Implement PR1143 (at -m64) by making basicaa look through extensions. We 
previously already handled it at -m32 because there were no i32->i64 
extensions for addressing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89959 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 18:53:33 +00:00
Chris Lattner
b18004c13c fix two transposed lines duncan caught and add an explanatory comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89958 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 18:35:46 +00:00
Chris Lattner
8fe8ac725b this todo is resolved. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89957 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 17:14:10 +00:00
Chris Lattner
e405c64f6b move DecomposeGEPExpression out into ValueTracking.cpp 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89956 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 17:12:50 +00:00
Chris Lattner
fa3966881f teach GetLinearExpression to be a bit more aggressive. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89955 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 17:00:01 +00:00
Chris Lattner
5369250b73 resolve a fixme. I haven't figured out how to write a testcase 
to exercise this though.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89954 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 16:52:32 +00:00
Chris Lattner
5d5261c819 Teach basicaa that x|c == x+c when the c bits of x are clear. This 
allows us to compile the example in readme.txt into:

LBB1_1:                                                     ## %bb
	movl	4(%rdx,%rax), %ecx
	movl	%ecx, %esi
	imull	(%rdx,%rax), %esi
	imull	%esi, %ecx
	movl	%esi, 8(%rdx,%rax)
	imull	%ecx, %esi
	movl	%ecx, 12(%rdx,%rax)
	movl	%esi, 16(%rdx,%rax)
	imull	%ecx, %esi
	movl	%esi, 20(%rdx,%rax)
	addq	$16, %rax
	cmpq	$4000, %rax
	jne	LBB1_1

instead of:

LBB1_1: 
	movl	(%rdx,%rax), %ecx
	imull	4(%rdx,%rax), %ecx
	movl	%ecx, 8(%rdx,%rax)
	imull	4(%rdx,%rax), %ecx
	movl	%ecx, 12(%rdx,%rax)
	imull	8(%rdx,%rax), %ecx
	movl	%ecx, 16(%rdx,%rax)
	imull	12(%rdx,%rax), %ecx
	movl	%ecx, 20(%rdx,%rax)
	addq	$16, %rax
	cmpq	$4000, %rax
	jne	LBB1_1

GCC (4.2) doesn't seem to be able to eliminate the loads in this 
testcase either, it generates:

L2:
	movl	(%rdx), %eax
	imull	4(%rdx), %eax
	movl	%eax, 8(%rdx)
	imull	4(%rdx), %eax
	movl	%eax, 12(%rdx)
	imull	8(%rdx), %eax
	movl	%eax, 16(%rdx)
	imull	12(%rdx), %eax
	movl	%eax, 20(%rdx)
	addl	$4, %ecx
	addq	$16, %rdx
	cmpl	$1002, %ecx
	jne	L2




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89952 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 16:26:43 +00:00
Chris Lattner
f6ac4d9dad teach basicaa that A[i] != A[i+1]. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89951 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 16:18:10 +00:00
Chris Lattner
d84eb911a9 Change the other half of aliasGEP (which handles GEP differencing) to use DecomposeGEPExpression. This dramatically simplifies and shrinks the code by eliminating the horrible CheckGEPInstructions method, fixes a miscompilation (@test3) and makes the code more aggressive. In particular, we now handle the @test4 case, which is reduced from the SmallPtrSet constructor. Missing this caused us to emit a variable length memset instead of a fixed size one. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89922 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 02:17:34 +00:00
Chris Lattner
23e2a5b2ff Generalize DecomposeGEPExpression to exactly handle what Value::getUnderlyingObject does (when TD is around). This allows us to avoid calling DecomposeGEPExpression unless the ultimate alias check we care about passes, speedup up BasicAA a bit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89920 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 02:14:59 +00:00
Chris Lattner
4e91ee7a2a Implement a new DecomposeGEPExpression method, which decomposes a GEP into a list of scaled offsets. Use this to eliminate some previous ad-hoc code which was subtly broken (it assumed all Constant*'s were non-zero, but strange constant express could be zero). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89915 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 02:13:03 +00:00
Chris Lattner
539c9b99c2 Use GEPOperator more pervasively to simplify code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89914 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 02:11:08 +00:00
Chris Lattner
11fe72661d remove some redundant braces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89912 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 01:50:12 +00:00
Devang Patel
65dbc909f5 Use StringRef (again) in DebugInfo interface. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89866 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-25 17:36:49 +00:00
Devang Patel
193f720f11 Emit pubtypes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89725 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-24 01:14:22 +00:00
Jim Grosbach
dbc3577ea1 enable iv-users simplification by default 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89713 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-23 23:25:54 +00:00
Devang Patel
e54a5e88a5 Add CreateLocation varinat that accepts MDNode (with a default value). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89689 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-23 19:11:20 +00:00
Chris Lattner
b27db37ed0 fix comment, thanks all :) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89666 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-23 17:07:35 +00:00
Chris Lattner
403ac2ece3 use the new isNoAlias method to simplify some code, only do an escaping check if 
we have a non-constant pointer.  Constant pointers can't be local.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89665 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-23 16:46:41 +00:00
Chris Lattner
5d56b2d47d whitespace cleanup, tidying 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89664 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-23 16:45:27 +00:00
Chris Lattner
b34b82e9d1 speed up BasicAA a bit by implementing a long-standing TODO. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89663 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-23 16:44:43 +00:00
Dan Gohman
01b97dd01e Make ConstantFoldConstantExpression recursively visit the entire 
ConstantExpr, not just the top-level operator. This allows it to
fold many more constants.

Also, make GlobalOpt call ConstantFoldConstantExpression on
GlobalVariable initializers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89659 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-23 16:22:21 +00:00
Nick Lewycky
ae3d802953 Remove unused LLVMContext. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89642 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-23 03:29:18 +00:00
Nick Lewycky
c6501b13c0 Remove dead LLVMContext argument. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89641 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-23 03:26:09 +00:00
Chris Lattner
6c7276f17e add fixme for dubious code. Duncan, what do you think? 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89602 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-22 16:16:48 +00:00
Chris Lattner
4723303c97 remove a silly condition that doesn't make a lot of sense anymore. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89601 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-22 16:15:59 +00:00
Chris Lattner
92e803c2a4 reduce indentation, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89600 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-22 16:05:05 +00:00
Chris Lattner
66e08cf79a Remove the AliasAnalysis::getMustAliases method, which is dead. 
The hasNoModRefInfoForCalls isn't worth it as a filter because 
basicaa provides m/r info and everything chains to it, so remove
it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89599 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-22 16:01:44 +00:00
Nick Lewycky
f27f115ef5 Remove dead code. While there, also turn a few 'T* ' into 'T *' to match the 
rest of the file.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89577 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-22 02:38:11 +00:00
Dan Gohman
5bd698e65c Use stripPointerCasts(). Thanks Duncan! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89472 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-20 19:33:16 +00:00
Dan Gohman
837be07979 Revert the rule that considers comparisons between two pointers in the 
same object to be a non-capture; Duncan pointed out a way that such
a comparison could be a capture.

Make the rule that considers a comparison against null more specific,
and only consider noalias return values compared against null. This
still supports test/Transforms/GVN/nonescaping-malloc.ll, and is not
susceptible to the problem Duncan pointed out with noalias arguments.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89468 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-20 17:50:21 +00:00
Dan Gohman
ae079c250f Simplify this code; it's not necessary to check isIdentifiedObject here 
because if the results from getUnderlyingObject match, the values must
be from the same underlying object, even if we don't know what that
object is.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89434 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-20 01:34:03 +00:00
Dan Gohman
ac146657fc Teach getSmallConstantTripMultiple about Shl operators. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89426 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-20 01:09:34 +00:00
Dan Gohman
76c638a14c Refine the capture tracking rules for comparisons to be more 
careful about crazy methods of capturing pointers using comparisons.
Comparisons of identified objects with null in the default address
space are not captures. And, comparisons of two pointers within the
same identified object are not captures.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89421 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-20 00:50:47 +00:00
Dan Gohman
452ae47db6 Use isVoidTy(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89419 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-20 00:43:11 +00:00
Dan Gohman
6d903092c9 Refine this to only apply to null in the default address space. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89411 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-19 23:53:49 +00:00
Dan Gohman
f94b5edc45 Extend CaptureTracking to indicate when a value is never stored, even 
if it is not ultimately captured. Teach BasicAliasAnalysis that a 
local object address which does not escape and is never stored does
not alias with a value resulting from a load.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89398 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-19 21:57:48 +00:00
Dan Gohman
2a0fab118f Comparing a pointer with null is not a capture. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89389 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-19 21:34:07 +00:00
Jim Grosbach
97200e4dd4 Teach IVUsers to keep things simpler and track loop-invariant strides only 
for uses inside the loop. This works better with LSR. Disabled behind
-simplify-iv-users while benchmarking.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89299 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-19 02:05:44 +00:00
Dan Gohman
3dbb9e64d6 Simplify ComputeMultiple so that it doesn't depend on TargetData. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89175 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-18 00:58:27 +00:00
Devang Patel
427ef4e35f Remove dead code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89156 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-17 22:39:08 +00:00
Chris Lattner
d6add155a7 typo spotted by duncan. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88884 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-16 03:51:42 +00:00
Chris Lattner
800c47ec10 teach LVI to infer edge information from switch instructions. 
This allows JT to eliminate a ton of infeasible edges when
handling code like the templates in PatternMatch.h


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88869 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-15 20:02:12 +00:00
Chris Lattner
5553a3a510 fix a logic error that would cause LVI-JT to miscompile 
some conditionals


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88868 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-15 20:01:24 +00:00
Chris Lattner
e5642812d3 implement the first stab at caching queries. This isn't correct 
(because the invalidation logic is missing) but LVI isn't enabled
by default anyway.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88867 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-15 20:00:52 +00:00
Chris Lattner
2c5adf832a refactor a bunch of code forming the new LazyValueInfoCache 
and LVIQuery classes, no functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88866 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-15 19:59:49 +00:00
Nick Lewycky
20162ac566 Teach BasicAA that a constant expression can't alias memory provably not 
allocated until runtime (such as an alloca). Patch by Hans Wennborg!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88760 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-14 06:15:14 +00:00
Devang Patel
3ddf70442f Revert r87059 for now. It is failing clang tests. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@87070 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-13 02:27:33 +00:00
Victor Hernandez
0418c102dd Remove unnecessary llvm.dbg.declare bitcast 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@87059 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-13 01:44:55 +00:00
Devang Patel
70d75ca310 "Attach debug info with llvm instructions" mode was enabled a month ago. Now make it permanent and remove old way of inserting intrinsics to encode debug info for line number and scopes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@87014 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 19:02:56 +00:00
Evan Cheng
586f69a118 - Teach LSR to avoid changing cmp iv stride if it will create an immediate that 
cannot be folded into target cmp instruction.
- Avoid a phase ordering issue where early cmp optimization would prevent the
  later count-to-zero optimization.
- Add missing checks which could cause LSR to reuse stride that does not have
  users.
- Fix a bug in count-to-zero optimization code which failed to find the pre-inc
  iv's phi node.
- Remove, tighten, loosen some incorrect checks disable valid transformations.
- Quite a bit of code clean up.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86969 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 07:35:05 +00:00
Chris Lattner
f496e79f44 various fixes to the lattice transfer functions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86952 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 04:57:13 +00:00
Chris Lattner
b52675b643 Add a new getPredicateOnEdge method which returns more rich information for 
constant constraints.  Improve the LVI lattice to include inequality 
constraints.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86950 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 04:36:58 +00:00
Chris Lattner
38392bbeb8 expose edge information and switch j-t to use it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86920 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 01:29:10 +00:00
Chris Lattner
b8c124c343 move some stuff into DEBUG's and turn on lazy-value-info for 
the basic.ll testcase.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86918 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 01:22:16 +00:00
Devang Patel
afa5a34b30 Do not use StringRef in DebugInfo interface. 
This allows StringRef to skip controversial if(str) check in constructor.
Buildbots, wait for corresponding clang and llvm-gcc FE check-ins!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86914 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 00:50:58 +00:00
Chris Lattner
1697652922 make LazyValueInfo actually to some stuff. This isn't very tested but improves 
strswitch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86889 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-11 22:48:44 +00:00
Chris Lattner
cc4d3b25f3 stub out some LazyValueInfo interfaces, and have JumpThreading 
start using them in a trivial way when -enable-jump-threading-lvi
is passed.  enable-jump-threading-lvi will be my playground for 
awhile.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86789 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-11 02:08:33 +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
Chris Lattner
68cf6042c1 remove redundant foward declaration. This function is already in 
Analysis/Passes.h



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86765 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-11 00:21:21 +00:00
Devang Patel
53bb5c95af Implement support to debug inlined functions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86748 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 23:06:00 +00:00
Chris Lattner
40d8c28b27 move some generally useful functions out of jump threading 
into libanalysis and transformutils.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86735 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 22:26:15 +00:00
Devang Patel
6daf99bf8f Process InlinedAt location info. 
Update InsertDeclare to return newly inserted llvm.dbg.declare intrinsic.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86727 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 22:05:35 +00:00
Victor Hernandez
8e345a1c41 Update computeArraySize() to use ComputeMultiple() to determine the array size associated with a malloc; also extend PerformHeapAllocSRoA() to check if the optimized malloc's arg had its highest bit set, so that it is safe for ComputeMultiple() to look through sext instructions while determining the optimized malloc's array size 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86676 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 08:32:25 +00:00
Victor Hernandez
2b6705f5e7 Add ComputeMultiple() analysis function that recursively determines if a Value V is a multiple of unsigned Base 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86675 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 08:28:35 +00:00
Chris Lattner
70ce6d0819 I misread the parens, not so redundant after all. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86648 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 02:04:54 +00:00
Chris Lattner
9f3ce36d7e remove some redundant parens. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86645 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 01:56:04 +00:00
Chris Lattner
e34537856a add a new SimplifyInstruction API, which is like ConstantFoldInstruction, 
except that the result may not be a constant.  Switch jump threading to 
use it so that it gets things like (X & 0) -> 0, which occur when phi preds
are deleted and the remaining phi pred was a zero.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86637 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 01:08:51 +00:00
Jeffrey Yasskin
81cf432569 Fix DenseMap iterator constness. 
This patch forbids implicit conversion of DenseMap::const_iterator to
DenseMap::iterator which was possible because DenseMapIterator inherited
(publicly) from DenseMapConstIterator. Conversion the other way around is now
allowed as one may expect.

The template DenseMapConstIterator is removed and the template parameter
IsConst which specifies whether the iterator is constant is added to
DenseMapIterator.

Actually IsConst parameter is not necessary since the constness can be
determined from KeyT but this is not relevant to the fix and can be addressed
later.

Patch by Victor Zverovich!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86636 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 01:02:17 +00:00
Chris Lattner
d06094f068 factor simplification logic for AND and OR out to InstSimplify from instcombine. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86635 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 00:55:12 +00:00
Chris Lattner
210c5d4880 pull a bunch of logic out of instcombine into instsimplify for compare 
simplification, this handles the foldable fcmp x,x cases among many others.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86627 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 23:55:12 +00:00
Dan Gohman
1ba3b6c565 Pass the (optional) TargetData object to ConstantFoldInstOperands 
and ConstantFoldCompareInstOperands.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86626 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 23:34:17 +00:00
Chris Lattner
9dbb42944c rename SimplifyCompare -> SimplifyCmpInst and split it into 
Simplify[IF]Cmp pieces.  Add some predicates to CmpInst to 
determine whether a predicate is fp or int.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86624 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 23:28:39 +00:00
Chris Lattner
8f73deaa87 fix ConstantFoldCompareInstOperands to take the LHS/RHS as 
individual operands instead of taking a temporary array


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86619 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 23:06:58 +00:00
Chris Lattner
9f3c25aeb3 stub out a new libanalysis "instruction simplify" interface that 
takes decimated instructions and applies identities to them.  This
is pretty minimal at this point, but I plan to pull some instcombine
logic out into these and similar routines.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86613 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 22:57:59 +00:00
Dan Gohman
f75ef668a7 Default-addressspace null pointers don't alias anything. This allows 
GVN to be more aggressive. Patch by Hans Wennborg! (with a comment added by me)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86582 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 19:29:11 +00:00
Dan Gohman
81d893ccf2 Minor tidiness fixes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86565 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 18:19:43 +00:00
Victor Hernandez
9d0b704e3e Re-commit r86077 now that r86290 fixes the 179.art and 175.vpr ARM regressions. 
Here is the original commit message:

This commit updates malloc optimizations to operate on malloc calls that have constant int size arguments.

Update CreateMalloc so that its callers specify the size to allocate:
MallocInst-autoupgrade users use non-TargetData-computed allocation sizes.
Optimization uses use TargetData to compute the allocation size.

Now that malloc calls can have constant sizes, update isArrayMallocHelper() to use TargetData to determine the size of the malloced type and the size of malloced arrays.
Extend getMallocType() to support malloc calls that have non-bitcast uses.

Update OptimizeGlobalAddressOfMalloc() to optimize malloc calls that have non-bitcast uses.  The bitcast use of a malloc call has to be treated specially here because the uses of the bitcast need to be replaced and the bitcast needs to be erased (just like the malloc call) for OptimizeGlobalAddressOfMalloc() to work correctly.

Update PerformHeapAllocSRoA() to optimize malloc calls that have non-bitcast uses.  The bitcast use of the malloc is not handled specially here because ReplaceUsesOfMallocWithGlobal replaces through the bitcast use.

Update OptimizeOnceStoredGlobal() to not care about the malloc calls' bitcast use.

Update all globalopt malloc tests to not rely on autoupgraded-MallocInsts, but instead use explicit malloc calls with correct allocation sizes.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86311 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-07 00:16:28 +00:00
Devang Patel
5ebfa2d181 Tolerate invalid derived type. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86269 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-06 18:24:05 +00:00
Devang Patel
84c73e9b82 Do not bother to emit debug info for nameless global variable. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86259 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-06 17:58:12 +00:00
Chris Lattner
7b550ccfc5 remove a bunch of extraneous LLVMContext arguments 
from various APIs, addressing PR5325.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86231 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-06 04:27:31 +00:00
Victor Hernandez
df98761d08 Revert r86077 because it caused crashes in 179.art and 175.vpr on ARM 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86213 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-06 01:33:24 +00:00
Dan Gohman
a6a4aaefee Fix IVUsers to avoid assuming that the loop has a unique backedge. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86161 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-05 19:41:37 +00:00
Dan Gohman
f17e9511f1 Factor out the predicate code for loopsimplify form exit blocks into 
a separate helper function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86159 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-05 19:21:41 +00:00
Victor Hernandez
24f934d055 Update CreateMalloc so that its callers specify the size to allocate: 
MallocInst-autoupgrade users use non-TargetData-computed allocation sizes.
Optimization uses use TargetData to compute the allocation size.

Now that malloc calls can have constant sizes, update isArrayMallocHelper() to use TargetData to determine the size of the malloced type and the size of malloced arrays.
Extend getMallocType() to support malloc calls that have non-bitcast uses.

Update OptimizeGlobalAddressOfMalloc() to optimize malloc calls that have non-bitcast uses.  The bitcast use of a malloc call has to be treated specially here because the uses of the bitcast need to be replaced and the bitcast needs to be erased (just like the malloc call) for OptimizeGlobalAddressOfMalloc() to work correctly.

Update PerformHeapAllocSRoA() to optimize malloc calls that have non-bitcast uses.  The bitcast use of the malloc is not handled specially here because ReplaceUsesOfMallocWithGlobal replaces through the bitcast use.

Update OptimizeOnceStoredGlobal() to not care about the malloc calls' bitcast use.

Update all globalopt malloc tests to not rely on autoupgraded-MallocInsts, but instead use explicit malloc calls with correct allocation sizes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86077 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-05 00:03:03 +00:00
Devang Patel
61ecbd196c While calculating original type size for a derived type, handle type variants encoded as DIDerivedType appropriately. 
This improves bitfield support.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86073 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-04 23:48:00 +00:00