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* rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which isChris Lattner2011-06-18
| | | | | | | | | | | for pre-2.9 bitcode files. We keep x86 unaligned loads, movnt, crc32, and the target indep prefetch change. As usual, updating the testsuite is a PITA. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133337 91177308-0d34-0410-b5e6-96231b3b80d8
* make the asmparser reject function and type redefinitions. 'Merging' hasn't ↵Chris Lattner2011-06-17
| | | | | | | | | been needed since llvm-gcc 3.4 days. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133248 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove support for using "foo" as symbols instead of %"foo". This is ancientChris Lattner2011-06-17
| | | | | | | | syntax and has been long obsolete. As usual, updating the tests is the nasty part of this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133242 91177308-0d34-0410-b5e6-96231b3b80d8
* manually upgrade a bunch of tests to modern syntax, and remove some thatChris Lattner2011-06-17
| | | | | | | | are either unreduced or only test old syntax. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133228 91177308-0d34-0410-b5e6-96231b3b80d8
* Test case for r132797.John McCall2011-06-14
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132962 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply r131781, now that the GVN bug with partially-aliasing loadsDan Gohman2011-06-04
| | | | | | | is disabled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132632 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove this test, which should have been reverted along with r131781.Dan Gohman2011-06-04
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132628 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r131781 again. Apparently there is more going on here.Dan Gohman2011-06-04
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132625 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply r131781 (revert r131809), now that some BasicAA shortcomingsDan Gohman2011-06-04
| | | | | | | it exposed are fixed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132611 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix BasicAA's recursion detection so that it doesn't pessimizeDan Gohman2011-06-04
| | | | | | | | | | queries in the case of a DAG, where a query reaches a node visited earlier, but it's not on a cycle. This avoids MayAlias results in cases where BasicAA is expected to return MustAlias or PartialAlias in order to protect TBAA. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132609 91177308-0d34-0410-b5e6-96231b3b80d8
* When merging MustAlias and PartialAlias, chose PartialAlias insteadDan Gohman2011-06-03
| | | | | | | of conservatively choosing MayAlias. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132579 91177308-0d34-0410-b5e6-96231b3b80d8
* Make DecomposeGEPExpression check SimplifyInstruction onlyDan Gohman2011-05-24
| | | | | | | | | after checking for a GEP, so that it matches what GetUnderlyingObject does. This fixes an obscure bug turned up by bugpoint in the testcase for PR9931. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131971 91177308-0d34-0410-b5e6-96231b3b80d8
* I missed a checking with my GVN change. Chris Lattner2011-05-22
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131851 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert commit 131781, to see if it fixes the x86-64 dragonegg buildbot.Duncan Sands2011-05-21
| | | | | | | | | | Original log message: When BasicAA can determine that two pointers have the same base but differ by a dynamic offset, return PartialAlias instead of MayAlias. See the comment in the code for details. This fixes PR9971. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131809 91177308-0d34-0410-b5e6-96231b3b80d8
* When BasicAA can determine that two pointers have the same base butDan Gohman2011-05-21
| | | | | | | | differ by a dynamic offset, return PartialAlias instead of MayAlias. See the comment in the code for details. This fixes PR9971. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131781 91177308-0d34-0410-b5e6-96231b3b80d8
* Teach BasicAA about arm.neon.vld1 and vst1.Dan Gohman2011-04-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130327 91177308-0d34-0410-b5e6-96231b3b80d8
* When analyzing functions known to only access argument pointees,Dan Gohman2011-04-27
| | | | | | | | | | only check arguments with pointer types. Update the documentation of IntrReadArgMem reflect this. While here, add support for TBAA tags on intrinsic calls. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130317 91177308-0d34-0410-b5e6-96231b3b80d8
* Test case and comment for PR9633.Andrew Trick2011-04-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130294 91177308-0d34-0410-b5e6-96231b3b80d8
* Make tests more useful.Benjamin Kramer2011-04-25
| | | | | | lit needs a linter ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130126 91177308-0d34-0410-b5e6-96231b3b80d8
* PR9634: Don't unconditionally tell the AliasSetTracker that the PreheaderLoadEli Friedman2011-04-07
| | | | | | | | | | | | | is equivalent to any other relevant value; it isn't true in general. If it is equivalent, the LoopPromoter will tell the AST the equivalence. Also, delete the PreheaderLoad if it is unused. Chris, since you were the last one to make major changes here, can you check that this is sane? git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129049 91177308-0d34-0410-b5e6-96231b3b80d8
* remove postdom frontiers, because it is dead. Forward dom frontiers areChris Lattner2011-04-05
| | | | | | | still used by RegionInfo :( git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128943 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r128140 for now.Anders Carlsson2011-03-23
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128149 91177308-0d34-0410-b5e6-96231b3b80d8
* A global variable with internal linkage where all uses are in one function ↵Anders Carlsson2011-03-23
| | | | | | and whose address is never taken is a non-escaping local object and can't alias anything else. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128140 91177308-0d34-0410-b5e6-96231b3b80d8
* Propagate SCEV no-wrap flags whenever possible.Andrew Trick2011-03-15
| | | | | | | This needs review. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127638 91177308-0d34-0410-b5e6-96231b3b80d8
* When SCEV can determine the loop test is X < X, set ExactBECount=0.Andrew Trick2011-03-09
| | | | | | | | | When ExactBECount is a constant, use it for MaxBECount. When MaxBECount cannot be computed, replace it with ExactBECount. Fixes PR9424. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127342 91177308-0d34-0410-b5e6-96231b3b80d8
* teach SCEV that the scale and addition of an inbounds gep don't NSW.Chris Lattner2011-02-13
| | | | | | | | This fixes a FIXME in scev-aa.ll (allowing a new no-alias result) and generally makes things more precise. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125449 91177308-0d34-0410-b5e6-96231b3b80d8
* Per discussion with Dan G, inbounds geps *certainly* can haveChris Lattner2011-02-11
| | | | | | | | | | | | unsigned overflow (e.g. "gep P, -1"), and while they can have signed wrap in theoretical situations, modelling an AddRec as not having signed wrap is going enough for any case we can think of today. In the future if this isn't enough, we can revisit this. Modeling them as having NUW isn't causing any known problems either FWIW. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125410 91177308-0d34-0410-b5e6-96231b3b80d8
* Add another rdar number.Dan Gohman2011-01-24
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124125 91177308-0d34-0410-b5e6-96231b3b80d8
* Simplify some code with no functionality change. Make the test a lot moreNick Lewycky2011-01-23
| | | | | | | robust against smarter optimizations, using the power of FileCheck. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124081 91177308-0d34-0410-b5e6-96231b3b80d8
* Use value ranges to fold ext(trunc) in SCEV when possible.Nick Lewycky2011-01-23
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124062 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement requiredTransitiveTobias Grosser2011-01-20
| | | | | | | The PassManager did not implement the transitivity of requiredTransitive. This was unnoticed since 2006. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123942 91177308-0d34-0410-b5e6-96231b3b80d8
* Similarly, analyze truncate through multiply.Nick Lewycky2011-01-19
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123842 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a missed SCEV fold that is required to continue analyzing the IR producedNick Lewycky2011-01-19
| | | | | | | | | | | | by indvars through the scev expander. trunc(add x, y) --> add(trunc x, y). Currently SCEV largely folds the other way which is probably wrong, but preserved to minimize churn. Instcombine doesn't do this fold either, demonstrating a missed optz'n opportunity on code doing add+trunc+add. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123838 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a missing SCEV simplification sext(zext x) --> zext x.Nick Lewycky2011-01-19
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123832 91177308-0d34-0410-b5e6-96231b3b80d8
* Teach BasicAA to return PartialAlias in cases where both pointersDan Gohman2011-01-18
| | | | | | | | | are pointing to the same object, one pointer is accessing the entire object, and the other is access has a non-zero size. This prevents TBAA from kicking in and saying NoAlias in such cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123775 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert the testcase from the previous reverted commit.Eric Christopher2011-01-11
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123227 91177308-0d34-0410-b5e6-96231b3b80d8
* add a testcase I missed in previous commit.Chris Lattner2011-01-09
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123143 91177308-0d34-0410-b5e6-96231b3b80d8
* teach SCEV analysis of PHI nodes that PHI recurences formedChris Lattner2011-01-09
| | | | | | | | with GEP instructions are always NUW, because PHIs cannot wrap the end of the address space. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123105 91177308-0d34-0410-b5e6-96231b3b80d8
* reduce indentation. Print <nuw> and <nsw> when dumping SCEV AddRec'sChris Lattner2011-01-09
| | | | | | | that have the bit set. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123104 91177308-0d34-0410-b5e6-96231b3b80d8
* fix rdar://8813415 - a miscompilation of 164.gzip that loop-idiomChris Lattner2011-01-03
| | | | | | | exposed. It turns out to be a latent bug in basicaa, scary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122772 91177308-0d34-0410-b5e6-96231b3b80d8
* filecheckizeChris Lattner2011-01-03
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122771 91177308-0d34-0410-b5e6-96231b3b80d8
* -enable-tbaa is on by default now.Dan Gohman2010-12-16
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121945 91177308-0d34-0410-b5e6-96231b3b80d8
* Make memcpyopt TBAA-aware.Dan Gohman2010-12-16
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121944 91177308-0d34-0410-b5e6-96231b3b80d8
* Move Sub simplifications and additional Add simplifications out ofDuncan Sands2010-12-15
| | | | | | | instcombine and into InstructionSimplify. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121861 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply r121520, PartialAlias implementation for BasicAA, now thatDan Gohman2010-12-13
| | | | | | | memdep is updated to handle it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121725 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r121520, which may have introduced miscompilations.Dan Gohman2010-12-10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121573 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement PartialAlias checking in BasicAA.Dan Gohman2010-12-10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121520 91177308-0d34-0410-b5e6-96231b3b80d8
* remove fixme comment too.Chris Lattner2010-11-30
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120493 91177308-0d34-0410-b5e6-96231b3b80d8
* check in *all* files. This is now handled by my previous DSE commit.Chris Lattner2010-11-30
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120492 91177308-0d34-0410-b5e6-96231b3b80d8
* test: Check the feature 'loadable_module' with load modules in %llvmshlibdir.NAKAMURA Takumi2010-11-29
| | | | | | %llvmshlibdir should be 'bin' on Cygming. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120282 91177308-0d34-0410-b5e6-96231b3b80d8
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