Summary:
SCEV Predicates represent conditions that typically cannot be derived from
static analysis, but can be used to reduce SCEV expressions to forms which are
usable for different optimizers.
ScalarEvolution now has the rewriteUsingPredicate method which can simplify a
SCEV expression using a SCEVPredicateSet. The normal workflow of a pass using
SCEVPredicates would be to hold a SCEVPredicateSet and every time assumptions
need to be made a new SCEV Predicate would be created and added to the set.
Each time after calling getSCEV, the user will call the rewriteUsingPredicate
method.
We add two types of predicates
SCEVPredicateSet - implements a set of predicates
SCEVEqualPredicate - tests for equality between two SCEV expressions
We use the SCEVEqualPredicate to re-implement stride versioning. Every time we
version a stride, we will add a SCEVEqualPredicate to the context.
Instead of adding specific stride checks, LoopVectorize now adds a more
generic SCEV check.
We only need to add support for this in the LoopVectorizer since this is the
only pass that will do stride versioning.
Reviewers: mzolotukhin, anemet, hfinkel, sanjoy
Subscribers: sanjoy, hfinkel, rengolin, jmolloy, llvm-commits
Differential Revision: http://reviews.llvm.org/D13595
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This revision has introduced an issue that only affects bootstrapped compiler
when it is printing the ASM. It turns out that the new code path taken due to
legalizing a scalar_to_vector of i64 -> v2i64 exposes a missing check in a
micro optimization to change a load followed by a scalar_to_vector into a
load and splat instruction on PPC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251798 91177308-0d34-0410-b5e6-96231b3b80d8
Instead of rolling our own min/max matching code (which is notoriously
hard to get completely right), use ValueTracking's instead.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251785 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
The new function sys::path::user_cache_directory tries to discover
a directory suitable for cache storage for current system user.
On Windows and Darwin it returns a path to system-specific user cache directory.
On Linux it follows XDG Base Directory Specification, what is:
- use non-empty $XDG_CACHE_HOME env var,
- use $HOME/.cache.
Reviewers: chapuni, aaron.ballman, rafael
Subscribers: rafael, aaron.ballman, llvm-commits
Differential Revision: http://reviews.llvm.org/D13801
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251784 91177308-0d34-0410-b5e6-96231b3b80d8
1. Added a set of public interfaces in InstrProfRecord
class to access (read/write) value profile data.
2. Changed IndexedProfile reader and writer code to
use the newly defined interfaces and hide implementation
details.
3. Added a couple of unittests for value profiling:
- Test new interfaces to get and set value profile data
- Test value profile data merging with various scenarios.
No functional change is expected. The new interfaces will also
make it possible to change on-disk format of value prof data
to be more compact (to be submitted).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251771 91177308-0d34-0410-b5e6-96231b3b80d8
Have `getConstantEvolutionLoopExitValue` work correctly with multiple
entry loops.
As far as I can tell, `getConstantEvolutionLoopExitValue` never did the
right thing for multiple entry loops; and before r249712 it would
silently return an incorrect answer. r249712 changed SCEV to fail an
assert on a multiple entry loop, and this change fixes the underlying
issue.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251770 91177308-0d34-0410-b5e6-96231b3b80d8
Optimized <8 x i32> to <8 x i16>
<4 x i64> to < 4 x i32>
<16 x i16> to <16 x i8>
All these oprtrations use now AVX512F set (KNL). Before this change it was implemented with AVX2 set.
Differential Revision: http://reviews.llvm.org/D14108
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This adds support for COFF I386. This is sufficient for code execution in a
32-bit JIT, though, imported symbols need to custom lowered for the redirection.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251761 91177308-0d34-0410-b5e6-96231b3b80d8
We never need to pass end(). This will also remove some complication
once we start adding error checking.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251758 91177308-0d34-0410-b5e6-96231b3b80d8
Prevent `createNodeFromSelectLikePHI` from creating SCEV expressions
that break LCSSA.
A better fix for the same issue is to teach SCEVExpander to not break
LCSSA by inserting PHI nodes at appropriate places. That's planned for
the future.
Fixes PR25360.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251756 91177308-0d34-0410-b5e6-96231b3b80d8
The initial coverage checking code for sample records failed to count
records inside inlined profiles. This change fixes the oversight.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251752 91177308-0d34-0410-b5e6-96231b3b80d8
This is a bit ugly, but has a few advantages:
* Archive is now easy to copy since there is no Archive -> Child -> Archive
loop.
* It makes it clear that we already checked for errors when finding the Child
data.
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attribute is not present.
During my refactor in r251595 I changed the behavior of optimizeSqrt(),
skipping the transformation if the function wasn't marked with unsafe-fp-math
attribute. This fixed a bug, as confirmed by Sanjay (before the optimization
was silently executed anyway), although it wasn't my primary aim.
This commit adds a test to ensure the code doesn't break again.
Reported by: Marcello Maggioni
Discussed with: Sanjay Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251747 91177308-0d34-0410-b5e6-96231b3b80d8
This complements CopyConstructorNotSmallTest. If we are testing the copy
constructor in such a way, we should also probably test assignment in the same
way.
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underlying memory, and will automatically release it on destruction.
Use this to tidy up the orc::IndirectStubsInfo class.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251731 91177308-0d34-0410-b5e6-96231b3b80d8
This is a really straightforward port. Also adds a test for the pass,
since it only seemed to be tested tangentially before.
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