Bob Wilson
65ab34f3f2
Some superficial cleanups.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90866 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-08 18:27:03 +00:00
Bob Wilson
78c50b8cd6
Clean up dead operands left around after SROA replaces a mem intrinsic.
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I'm not aware that this does anything significant on its own, but it's
needed for another patch that I'm working on.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90864 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-08 18:22:03 +00:00
Duncan Sands
7a154cf228
Teach GlobalOpt to delete aliases with internal linkage (after
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forwarding any uses). GlobalDCE can also do this, but is only
run at -O3.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90850 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-08 10:10:20 +00:00
Nick Lewycky
87f8e49027
Remove unnecessary #include "llvm/LLVMContext.h".
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90836 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-08 05:45:41 +00:00
Chris Lattner
08bc2701a2
fix PR5698
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90708 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-06 17:17:23 +00:00
Chris Lattner
bc9a28dd54
constant fold loads from memcpy's from global constants. This is important
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because clang lowers nontrivial automatic struct/array inits to memcpy from
a global array.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90698 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-06 05:29:56 +00:00
Chris Lattner
cb9cbc4949
add support for forwarding mem intrinsic values to non-local loads.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90697 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-06 04:54:31 +00:00
Chris Lattner
faf815b938
Handle forwarding local memsets to loads. For example, we optimize this:
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short x(short *A) {
memset(A, 1, sizeof(*A)*100);
return A[42];
}
to 'return 257' instead of doing the load.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90695 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-06 01:57:02 +00:00
Nick Lewycky
83e8ec73e1
Generalize this optimization to work on equality comparisons between any two
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integers that are constant except for a single bit (the same n-th bit in each).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90646 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-05 05:00:00 +00:00
Bob Wilson
39fdd6947c
Fix up some comments.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90603 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-04 21:57:37 +00:00
Bob Wilson
d614a1f0a8
Fix 80-column violations.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90601 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-04 21:51:35 +00:00
Chris Lattner
45305d4ff6
add an assert to make it really clear what this is doing. Return singularval as
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a compile time perf optimization to avoid a load.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90507 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-04 01:03:32 +00:00
Bob Wilson
4a8ee23a81
Fix a comment typo.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90487 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-03 21:47:07 +00:00
Owen Anderson
c9f2027adb
Fix this crasher, and add a FIXME for a missed optimization.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90408 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-03 03:43:29 +00:00
Chris Lattner
7896c9f436
improve portability to avoid conflicting with std::next in c++'0x.
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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
Jim Grosbach
43a8241b65
Move EliminateDuplicatePHINodes() from SimplifyCFG.cpp to Local.cpp
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90324 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-02 17:06:45 +00:00
Andreas Neustifter
059a983531
Cheap, mostly strict, stable sorting.
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This is necessary for tests so the results are comparable.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90320 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-02 15:57:15 +00:00
Owen Anderson
9ff5a23186
Cleanup/remove some parts of the lifetime region handling code in memdep and GVN,
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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
Chris Lattner
720e790480
factor some code better.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90299 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-02 06:44:58 +00:00
Chris Lattner
65a9ab4f8f
formatting cleanups.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90298 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-02 06:35:55 +00:00
Chris Lattner
bf796323b2
tidy up, remove dependence on order of evaluation of function args from EmitMemCpy.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90297 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-02 06:05:42 +00:00
Chris Lattner
46875c0bfb
fix PR5640 by tracking whether a block is the header of a loop more
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precisely, which prevents us from infinitely peeling the loop.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90211 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-01 06:04:43 +00:00
Benjamin Kramer
e6f329476c
Revert r90089 for now, it's breaking selfhost.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90097 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-29 21:17:48 +00:00
Benjamin Kramer
4aac07e898
Fix two FIXMEs.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90089 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-29 20:29:30 +00:00
Chris Lattner
cd188e9665
add testcases for the foo_with_overflow op xforms added recently and
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fix bugs exposed by the tests. Testcases from Alastair Lynn!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90056 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-29 02:57:29 +00:00
Chris Lattner
3f40e23392
Implement PR5634.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90046 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-29 00:51:17 +00:00
Chris Lattner
0c264b16b0
reenable load address insertion in load pre. This allows us to
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handle cases like this:
void test(int N, double* G) {
long j;
for (j = 1; j < N - 1; j++)
G[j+1] = G[j] + G[j+1];
}
where G[1] isn't live into the loop.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90041 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-28 16:08:18 +00:00
Chris Lattner
dd696052f0
Enhance InsertPHITranslatedPointer to be able to return a list of newly
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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
971fd57f7d
disable value insertion for now, I need to figure out how
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to inform GVN about the newly inserted values. This fixes
PR5631.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90022 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 22:50:07 +00:00
Chris Lattner
6f7b210b25
Rework InsertPHITranslatedPointer to handle the recursive case, this
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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
8aee8efc0c
factor some logic out of instcombine into a new SimplifyAddInst method.
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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
8976e5950f
fix PR5436 by making the 'simple' case of SRoA not promote out of range
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array indexes. The "complex" case of SRoA still handles them, and correctly.
This fixes a weirdness where we'd correctly avoid transforming A[0][42] if
the 42 was too large, but we'd only do it if it was one gep, not two separate
ones.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90007 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 16:37:41 +00:00
Chris Lattner
616613d7a4
teach GVN's load PRE to insert computations of the address in predecessors
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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
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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
c514c1f521
factor some instcombine simplifications for getelementptr out to a new
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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
998e25a143
fix crash on Transforms/InstCombine/intrinsics.ll introduced by r89970
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89972 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26 22:08:06 +00:00
Chris Lattner
21f83a2f95
Fix PR5471 by removing an instcombine xform. Some pieces of the code
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generates store to undef and some generates store to null as the idiom
for undefined behavior. Since simplifycfg zaps both, don't remove the
undefined behavior in instcombine.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89971 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26 22:04:42 +00:00
Chris Lattner
2bbac75e5a
implement a bunch of xforms for overflow intrinsics, based on a patch
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by Alastair Lynn.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89970 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26 21:42:47 +00:00
Edward O'Callaghan
25798439da
Reverting patch in revision 89758, initial attempt at fixing PR5373 has proven to be bogus.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89844 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-25 05:38:41 +00:00
Edward O'Callaghan
de8d3b73c8
Fix for PR5373, Credit to Jakub Staszak.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89758 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-24 11:51:52 +00:00
Dan Gohman
01b97dd01e
Make ConstantFoldConstantExpression recursively visit the entire
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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
Dan Gohman
8f3817f505
Fix a use of an invalidated iterator in the case where there are multiple
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adjacent uses of a dead basic block from the same user. This fixes PR5596.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89658 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-23 16:13:39 +00:00
Nick Lewycky
ce2c51b670
Pull LLVMContext out of PromoteMemToReg.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89645 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-23 03:50:44 +00:00
Nick Lewycky
2e0316fcf0
Remove LLVMContext and its include.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89644 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-23 03:34:29 +00:00
Nick Lewycky
ae3d802953
Remove unused LLVMContext.
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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
55bd8bd6eb
Reapply r88830 with a bugfix: this transform only applies to icmp eq/ne. This
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fixes part of PR5438.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89639 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-23 03:17:33 +00:00
Eric Christopher
80bf1d5278
Add more optimizations for object size checking, enable handling of
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object size intrinsic and verify return type is correct. Collect various
code in one place.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89523 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-21 01:01:30 +00:00
Dan Gohman
a58a04921d
Make Loop::getLoopLatch() work on loops which don't have preheaders, as
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it may be used in contexts where preheader insertion may have failed due
to an indirectbr.
Make LoopSimplify's LoopSimplify::SeparateNestedLoop properly fail in
the case that it would require splitting an indirectbr edge.
These fix PR5502.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89484 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-20 20:51:18 +00:00
Dan Gohman
6a2392131e
Fix IPSCCP's code for deleting dead blocks to tolerate outstanding
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blockaddress users. This fixes PR5569.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89483 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-20 20:19:14 +00:00
Daniel Dunbar
f7751c134a
Revert "Add some rough optimizations for checking routines.", it buildeth not.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89482 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-20 20:17:30 +00:00