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* Removed useless constraints on return type at Sreturn instructionsxleroy2010-08-181-1/+1
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1470 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of branches/full-expr-4:xleroy2010-08-181-679/+442
| | | | | | | | | | | | | | | | | | | | | | - Csyntax, Csem: source C language has side-effects within expressions, performs implicit casts, and has nondeterministic reduction semantics for expressions - Cstrategy: deterministic red. sem. for the above - Clight: the previous source C language, with pure expressions. Added: temporary variables + implicit casts. - New pass SimplExpr to pull side-effects out of expressions (previously done in untrusted Caml code in cparser/) - Csharpminor: added temporary variables to match Clight. - Cminorgen: adapted, removed cast optimization (moved to back-end) - CastOptim: RTL-level optimization of casts - cparser: transformations Bitfields, StructByValue and StructAssign now work on non-simplified expressions - Added pretty-printers for several intermediate languages, and matching -dxxx command-line flags. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1467 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* More faithful semantics for volatile reads and writes.xleroy2010-05-231-11/+17
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1346 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* - Extended traces so that pointers within globals are supported as event values.xleroy2010-05-101-64/+69
| | | | | | | | - Revised handling of volatile reads: the execution environment dictates the value read, via the trace of events. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1345 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Strengthen chunktype inference and use it to remove some useless casts.xleroy2010-05-051-14/+99
| | | | | | | Finished proof of chunktype_compat, which was incomplete. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1335 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of the newmem and newextcalls branches:xleroy2010-03-071-1017/+1526
| | | | | | | | | | - Revised memory model with concrete representation of ints & floats, and per-byte access permissions - Revised Globalenvs implementation - Matching changes in all languages and proofs. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1282 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Revised lib/Integers.v to make it parametric w.r.t. word size.xleroy2009-11-191-3/+3
| | | | | | | | | Introduced Int.iwordsize and used it in place of "Int.repr 32" or "Int.repr (Z_of_nat wordsize)". git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1182 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* In generated Cminor functions, make sure local variables includexleroy2009-08-201-22/+63
| | | | | | | | all x used as destination of a call [x = f(args)]. This wasn't true before if x was a global C#minor variable. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1136 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Added 'going wrong' behaviorsxleroy2009-08-051-1/+1
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1120 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Transition semantics for Clight and Csharpminorxleroy2009-08-031-726/+799
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1119 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Adapted to work with Coq 8.2-1v1.4.1xleroy2009-06-051-2/+2
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1076 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* - Added alignment constraints to memory loads and stores.xleroy2009-01-111-20/+72
| | | | | | | | | | | - In Cminor and below, removed pointer validity check in semantics of comparisons, so that evaluation of expressions is independent of memory state. - In Cminor and below, removed "alloc" instruction. - Cleaned up commented-away parts. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@945 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Replace cast{8,16}{signed,unsigned} with zero_ext and sign_ext.xleroy2008-12-291-8/+8
| | | | | | | | lib/Integers.v: added more properties for ARM port. lib/Coqlib.v: added more properties for division and powers of 2. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@928 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Fusion partielle de la branche contsem: xleroy2008-07-081-1/+1
| | | | | | | | | | - semantiques a continuation pour Cminor et CminorSel - goto dans Cminor Suppression de backend/RTLbigstep.v, devenu inutile. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@692 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Revu les comparaisons de pointeurs: == et <> sont definis entre 2 pointeurs ↵xleroy2008-05-301-23/+32
| | | | | | vers des blocs differents! git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@649 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Introduction de l'operation intuoffloat (float -> unsigned int). Pas encore ↵xleroy2008-05-301-0/+1
| | | | | | utilisee dans le front-end C. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@647 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Ajout license, README, copyright noticesxleroy2008-01-271-0/+12
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@489 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Fusion de la branche restr-cminor. En Clight, C#minor et Cminor, les ↵xleroy2007-08-281-679/+614
| | | | | | expressions sont maintenant pures et les appels de fonctions sont des statements. Ajout de semantiques coinductives pour la divergence en Clight, C#minor, Cminor. Preuve de preservation semantique pour les programmes qui divergent. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@409 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Fusion des modifications faites sur les branches "tailcalls" et "smallstep".xleroy2007-08-041-375/+319
| | | | | | | | | | | | En particulier: - Semantiques small-step depuis RTL jusqu'a PPC - Cminor independant du processeur - Ajout passes Selection et Reload - Ajout des langages intermediaires CminorSel et LTLin correspondants - Ajout des tailcalls depuis Cminor jusqu'a PPC git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@384 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Suppression de lib/Sets.v, utilisation de FSet a la place. Generalisation ↵xleroy2007-03-021-1/+1
| | | | | | de Lattice pour utiliser une notion d'egalite possiblement differente de =. Adaptation de Kildall et de ses utilisateurs en consequence. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@182 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Meilleure compilation de la negation booleennexleroy2006-09-191-0/+7
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@112 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Simplification de Cminor: les affectations de variables locales ne sontxleroy2006-09-181-84/+82
| | | | | | | | plus des expressions mais des statements (Eassign -> Sassign). Cela simplifie les preuves et ameliore la qualite du RTL produit. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@111 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Revu traitement des variables globales dans AST.program et dans Globalenvs.xleroy2006-09-051-15/+13
| | | | | | | | Adaptation frontend, backend en consequence. Integration passe C -> C#minor dans common/Main.v. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@77 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Revu la repartition des sources Coq en sous-repertoiresxleroy2006-09-041-0/+2595
git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@73 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
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