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bf796323b2
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3718 Commits

Author SHA1 Message Date
Chris Lattner
bf796323b2 tidy up, remove dependence on order of evaluation of function args from EmitMemCpy. 
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 
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. 
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. 
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 
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. 
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 
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 
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 
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 
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. 
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 
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 
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
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
998e25a143 fix crash on Transforms/InstCombine/intrinsics.ll introduced by r89970 
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 
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 
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. 
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. 
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
8f3817f505 Fix a use of an invalidated iterator in the case where there are multiple 
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. 
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. 
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
55bd8bd6eb Reapply r88830 with a bugfix: this transform only applies to icmp eq/ne. This 
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 
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
6a2392131e Fix IPSCCP's code for deleting dead blocks to tolerate outstanding 
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. 
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
Eric Christopher
3bcaa8ac95 Add some rough optimizations for checking routines. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89479 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-20 19:57:37 +00:00
Duncan Sands
76700ba64c Fix PR5563, an expensive checks failure when running on 
tests/Transforms/InstCombine/shufflemask-undef.ll.  If
anyone cares, the use of 2*e here (and the equivalent
all over the place in instcombine) seems wrong, though
harmless: it should really be twice the length of the
input vector.  I think shufflevector used to require
that the mask have the same length as the input, but I
don't think that's true any more.  I don't care enough
about vectors to do anything about this...


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89456 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-20 13:19:51 +00:00
Dan Gohman
dab249b3b7 Enable hoisting of loads from constant memory by default. In cases where 
they are lowered to instruction sequences more complex than a simple
load, such that CodeGen cannot rematerialize them, a reload from a
spill slot is likely to be cheaper than the complex sequence.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89374 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-19 19:00:10 +00:00
Jim Grosbach
5023095799 grammar 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89145 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-17 21:37:04 +00:00
Jim Grosbach
464ecfee71 80-column violations 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89123 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-17 19:05:35 +00:00
Evan Cheng
076e085698 Generalize OptimizeLoopTermCond to optimize more loop terminating icmp to use postinc iv. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89116 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-17 18:10:11 +00:00
Jim Grosbach
56a1f806af Remove trailing whitespace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89110 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-17 17:53:56 +00:00
David Greene
f941d29077 Fix an expensive-checks error. 
The Mask and LHSMask may not be of the same size, so don't do the
transformation if they're different.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88972 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-16 21:52:23 +00:00
Duncan Sands
f63c41033a CreateIntCast takes an "isSigned" parameter. Pass "true" for it, rather than 
a name.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88908 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-16 12:32:28 +00:00
Chris Lattner
4e447ebc58 make PRE of loads preserve the alignment of the moved load instruction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88865 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-15 19:58:31 +00:00
Chris Lattner
1fb5630474 fix a bug handling 'not x' when x is undef. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88864 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-15 19:57:43 +00:00
Nick Lewycky
feb8018764 Revert r88830 and r88831 which appear to have caused a selfhost buildbot some 
grief. I suspect this patch merely exposed a bug else.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88841 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-15 07:47:32 +00:00
Nick Lewycky
df772f257f Teach instcombine to look for booleans in wider integers when it encounters a 
zext(icmp). It may be able to optimize that away. This fixes one of the cases
in PR5438.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88830 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-15 05:55:17 +00:00
Nick Lewycky
e79fddedca Remove LLVMContext from reassociate. It was threaded through every function but 
ultimately never used.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88763 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-14 07:25:54 +00:00
Dan Gohman
4ec01b268e Add an option for running GVN with redundant load processing disabled. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88742 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-14 02:27:51 +00:00
Owen Anderson
98538b4bea Re-enable this code, since redundant PHIs are now being better nuked. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@87042 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 23:22:41 +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
66c04c48de use getPredicateOnEdge to fold comparisons through PHI nodes, 
which implements GCC PR18046.  This also gets us 360 more
jump threads on 176.gcc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86953 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 05:24:05 +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
0e0ff29271 switch jump threading to use getPredicateOnEdge in one place 
making the new LVI stuff smart enough to subsume some special
cases in the old code.  Disable them when LVI is around, the
testcase still passes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86951 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 04:37:50 +00:00
Chris Lattner
87e9f59c7a with the new code we can thread non-instruction values. This 
allows us to handle the test10 testcase.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86924 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 01:41:34 +00:00
Chris Lattner
1c96b4187b this argument can be an arbitrary value, it doesn't need to be an instruction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86923 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 01:37:43 +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