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* Move block predicator to VCGenerationGravatar Peter Collingbourne2012-06-18
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* GPUVerify: block predicator: add a mode which disables procedure predicatesGravatar Peter Collingbourne2012-06-18
| | | | | This mode also conditionalises if statements to avoid problems with recursion.
* Dafny: fixed parsing bug.Gravatar Jason Koenig2012-06-15
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* GPUVerify: implement is-a-constant analysisGravatar Peter Collingbourne2012-06-15
| | | | | | | | | | | | | This analysis is used to generate race checking invariants for arbitrary (thread-level) constant offsets, in place of invariant generators for four specific constants (thread-id, global-id, 2D thread-id and 2D global-id) which are subsumed by the new analysis. The main motivation is to be able to recognise offsets used by word level accesses into byte arrays, which are formed from linear combinations of thread IDs and constants. This change allows us to remove the 2D and global size analyses, resulting in a 536-line net reduction in total code size.
* GPUVerify: revert ac36537a0eb8, as this is in fact a candidate invariant ↵Gravatar Peter Collingbourne2012-06-15
| | | | | | (e.g. consider a loop within a conditional) Pointed out by Ally.
* GPUVerify: when dualising assume and assert statements, emit two statements ↵Gravatar Peter Collingbourne2012-06-15
| | | | instead of a conjunction
* MergeGravatar Unknown2012-06-14
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* | Dafny: in compiler, respect C#'s different scoping rules and lack of support ↵Gravatar Unknown2012-06-14
| | | | | | | | for special characters in identifiers
* | MergeGravatar Unknown2012-06-14
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* | | Dafny: fixed a couple of compiler bugsGravatar Unknown2012-06-14
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| | * Inter-thread race checking implementation done.Gravatar Unknown2012-06-14
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| | * Fix for structured regions.Gravatar Unknown2012-06-14
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| | * Progress on inter-group race checkingGravatar Unknown2012-06-14
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| | * MergeGravatar Unknown2012-06-14
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| | * Started work on inter-group race checking.Gravatar Unknown2012-06-14
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| * | MergeGravatar Jason Koenig2012-06-13
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| * | Dafny: allow parallel assignments to assign to the same LHS if the RHS match.Gravatar Jason Koenig2012-06-13
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* | | MergeGravatar Unknown2012-06-13
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* | | Dafny: Changed the semantics of the assign-such-that statement "x :| P;" to ↵Gravatar Unknown2012-06-13
| | | | | | | | | | | | check the existence of a value. The previous "assume only" version is available by supplying the keyword "assume" in front of "P".
| * | MergeGravatar Jason Koenig2012-06-13
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| * | | Dafny: liberalized equality to work when the types could possibly be the sameGravatar Jason Koenig2012-06-13
|/ / / | | | | | | | | | (i.e. a != b is allowed when a: array<int> and b: array<T>)
| * / GPUVerify: the non-uniform loop invariant is not a candidate invariantGravatar Peter Collingbourne2012-06-12
|/ / | | | | | | Thanks to Ally for pointing this out.
* | deleted an unused classGravatar qadeer2012-06-12
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* | MergeGravatar qadeer2012-06-12
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* | | refactoring in SIGravatar qadeer2012-06-12
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| * | Dafny: allow types to be qualified with the name of the module that declares ↵Gravatar Unknown2012-06-11
| | | | | | | | | | | | them (for now, this is supported only in type expressions and "new" allocations, not in places where the type name is used to qualify some other type member)
| * | Dafny: fixed bug in type cloning, as part of refinement machineryGravatar Unknown2012-06-11
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| * | Dafny: removed support for the old keyword "unlimited" (all functions are ↵Gravatar Unknown2012-06-11
| | | | | | | | | | | | limited)
| * | GPUVerify: emit non-uniform loop candidate invariantGravatar Peter Collingbourne2012-06-11
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| * | GPUVerify: emit "uniform loop" candidate invariantGravatar Peter Collingbourne2012-06-11
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| * | GPUVerify: dualiser: preserve attributes of assert cmdGravatar Peter Collingbourne2012-06-11
| | | | | | | | | | | | This allows us to retain invariant tags.
| * | GPUVerify: factor out CreateCandidateInvariant from AddCandidateInvariantGravatar Peter Collingbourne2012-06-11
| | | | | | | | | | | | | | | This allows us to build candidate invariants in situations where we don't have a Region, such as the block predicator.
| * | GPUVerify: initialise invariantGenerationCounter in the constructor, rather ↵Gravatar Peter Collingbourne2012-06-11
| |/ | | | | | | | | | | | | than in ComputeInvariant This allows us to emit invariants in places earlier than ComputeInvariant (such as the block predicator).
* | MergeGravatar qadeer2012-06-10
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* | 1. changed new SI implemnetation so that it performs substitution for call sitesGravatar qadeer2012-06-10
| | | | | | | | 2. changed the block expression to be the negation of the disjunction of all outgoing edges
| * Dafny/Boogie/BVD: made Dafny plug-in for BVD work againGravatar Rustan Leino2012-06-08
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| * GPUVerify: teach the array control flow analyser to handle unstructured programsGravatar Peter Collingbourne2012-06-08
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| * GPUVerify: if one input file is supplied, choose output file name more ↵Gravatar Peter Collingbourne2012-06-08
| | | | | | | | | | | | | | intelligently Specifically, if the input file's extension is not ".bpl", use its name (without extension) plus ".bpl" as the output file name.
| * GPUVerify: fix line endingsGravatar Peter Collingbourne2012-06-08
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* final (hopefully) fix to new SIGravatar qadeer2012-06-07
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* testing a fix in SIGravatar qadeer2012-06-07
| | | | | also changing back the output path in BoogieDriver also disabling z3api for now since it does not build
* Merging againGravatar Ken McMillan2012-06-07
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* | GPUVerify: have StripThreadIdentifiers deal properly with identifiers ↵Gravatar Peter Collingbourne2012-06-07
| | | | | | | | containing a '$'
* | GPUVerify: block predicator: use the name '_P' for the procedure predicate ↵Gravatar Peter Collingbourne2012-06-07
| | | | | | | | for consistency with the structured predicator
* | GPUVerify: re-introduce the non-divergence check in unstructured modeGravatar Peter Collingbourne2012-06-07
| | | | | | | | This is OK now that we have assume stealing.
* | GPUVerify: emit assumes for backedgesGravatar Peter Collingbourne2012-06-07
| | | | | | | | | | | | Specifically, have the predicator emit backedge assumes with a :backedge attribute, and have the dualiser recognise such assumes and create an OR expression instead of an AND expression.
* | GPUVerify: refactor candidate invariant generators and analyses to use regionsGravatar Peter Collingbourne2012-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The main goal of this change is to make the candidate invariant generation code and various analyses capable of handling both structured and unstructured programs. This is achieved using a high level abstraction of "regions" -- a region may either be a "root region" representing the entire implementation, or a natural loop within that implementation. Note that this is a subset to the term's meaning in the context of compilers, in which regions are also used for conditional control flow. Each region consists of a set of commands and a set of child regions. This change also has the side effect of eliminating a large amount of boilerplate code -- its net effect is to reduce the number of lines of code by 88.
| * Trying to merge with recent changes, failing.Gravatar Ken McMillan2012-06-05
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| | * Some changes to support expanded use of z3api.Gravatar Ken McMillan2012-06-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Should not affect function of other provers. There is an option added in Check.cs to allow creation of a Checker with a user-specified ProverContext. Also, some extension of z3api prover context to support conversion of Z3 formulas back to VCExpr. Finally, some experimental code, not enabled, to allow conversion of loops to recursion with "head recursion" rather than "tail recursion" (i.e., recursive call before loop body rather than after).
* | | GPUVerify: recognise offsets in forms other than that produced by the old ↵Gravatar Peter Collingbourne2012-06-01
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