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* Revised treatment of _Alignas, for better compatibility with GCC and Clang, ↵xleroy2013-11-061-2/+2
| | | | | | and to avoid wasting global variable space by inflating their sizeof needlessly. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2362 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of the "alignas" branch.xleroy2013-10-051-2/+2
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2342 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Revised handling of int->float conversions:xleroy2013-07-081-3/+7
| | | | | | | | | | - introduce Float.floatofint{,u} and use it in the semantics of C - prove that it is equivalent to int->double conversion followed by double->float rounding, and use this fact to justify code generation in Cshmgen. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2294 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Treat casts int64 -> float32 as primitive operations instead of twoxleroy2013-07-031-3/+3
| | | | | | | | casts int64 -> float64 -> float32. The latter causes double rounding errors. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2290 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of the "princeton" branch:xleroy2013-06-161-2/+2
| | | | | | | | | | | | | | - Define type "block" as "positive" instead of "Z". - Strengthen mem_unchanged_on so that the permissions are identical, instead of possibly increasing. - Move mem_unchanged_on from Events to Memory.Mem. - Define it in terms of mem_contents rather than in terms of Mem.load. - ExportClight: try to name temporaries introduced by SimplExpr - SimplExpr: avoid reusing temporaries between different functions, instead, thread a single generator through all functions. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2276 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Revised semantics and compilation of 2-argument C operators to better match xleroy2013-05-061-18/+18
| | | | | | | | "the usual binary conversions" and be more robust towards future extensions e.g. with 32-bit float values. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2239 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Expand 64-bit integer comparisons into 32-bit integer comparisons.xleroy2013-04-291-2/+7
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2218 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* driver: removed option -flonglongxleroy2013-04-221-0/+12
| | | | | | | | test/c: added SHA3 cfrontend: support casts between long long and pointers, and comparisons between them. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2213 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Big merge of the newregalloc-int64 branch. Lots of changes in two directions:xleroy2013-04-201-277/+249
| | | | | | | | | 1- new register allocator (+ live range splitting, spilling&reloading, etc) based on a posteriori validation using the Rideau-Leroy algorithm 2- support for 64-bit integer arithmetic (type "long long"). git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2200 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Pointers one pastxleroy2013-02-151-1/+2
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2118 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Ported to Coq 8.4pl1. Merge of branches/coq-8.4.xleroy2013-01-291-5/+5
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2101 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of the clightgen branch:xleroy2012-12-291-310/+76
| | | | | | | | | | | | | | | | | | - Alternate semantics for Clight where function parameters are temporaries, not variables - New pass SimplLocals that turns non-addressed local variables into temporaries - Simplified Csharpminor, Cshmgen and Cminorgen accordingly - SimplExpr starts its temporaries above variable names, therefoe Cminorgen no longer needs to encode variable names and temps names. - Simplified Cminor parser & printer, as well as Errors, accordingly. - New tool clightgen to produce Clight AST in Coq-parsable .v files. - Removed side condition "return type is void" on rules skip_seq in the semantics of CompCert C, Clight, C#minor, Cminor. - Adapted RTLgenproof accordingly (now uses a memory extension). git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2083 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Globalenvs: allocate one-byte block with permissions Nonempty for eachxleroy2012-11-121-29/+8
| | | | | | | | | | | function definition, so that comparisons between function pointers are correctly defined. AST, Globalenvs, and many other files: represent programs as a list of (function or variable) definitions instead of two lists, one for functions and the other for variables. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2067 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Make Clight independent of CompCert C.xleroy2012-10-081-11/+11
| | | | | | | Common parts are factored out in cfrontend/Ctypes.v and cfrontend/Cop.v git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2060 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of branch seq-and-or. See Changelog for details.xleroy2012-10-061-431/+146
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2059 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Remove Val.is_true and Val.is_false, no longer used.xleroy2012-08-061-4/+2
| | | | | | | Simplified definition of Val.bool_of_val. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2015 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* - Revised non-overflow constraints on memory injections so that xleroy2012-07-231-8/+6
| | | | | | | | | | injections compose (Values, Memdata, Memory) - Memory chunks: Mfloat64 now has alignment 8; introduced Mfloat64al32 that works like old Mfloat64 (i.e. has alignment 4); simplified handling of memcpy builtin accordingly. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1983 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* - Support for _Alignof(ty) operator from ISO C 2011xleroy2012-02-261-2/+0
| | | | | | | | | | and __alignof__(ty), __alignof__(expr) from GCC. - Resurrected __builtin_memcpy_aligned, useful for files generated by Scade KCG 6. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1827 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of the "volatile" branch:xleroy2012-02-041-175/+344
| | | | | | | | | | | | - native treatment of volatile accesses in CompCert C's semantics - translation of volatile accesses to built-ins in SimplExpr - native treatment of struct assignment and passing struct parameter by value - only passing struct result by value remains emulated - in cparser, remove emulations that are no longer used - added C99's type _Bool and used it to express || and && more efficiently. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1814 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of the nonstrict-ops branch:xleroy2012-01-141-9/+11
| | | | | | | | | | | - Most RTL operators now evaluate to Some Vundef instead of None when undefined behavior occurs. - More aggressive instruction selection. - "Bertotization" of pattern-matchings now implemented by a proper preprocessor. - Cast optimization moved to cfrontend/Cminorgen; removed backend/CastOptim. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1790 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Cleaned up old commented-out partsxleroy2011-08-191-12/+0
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1719 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Improved semantics of castsxleroy2011-07-171-55/+53
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1685 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* In conditional expressions e1 ? e2 : e3, cast the results of e2 and e3 to ↵xleroy2011-07-161-110/+73
| | | | | | | | | the type of the whole conditional expression. Replaced predicates "cast", "is_true" and "is_false" by functions "sem_cast" and "bool_val". git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1684 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of branch new-semantics: revised and strengthened top-level statements ↵xleroy2011-07-151-42/+9
| | | | | | of semantic preservation. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1683 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Fix treatment of function pointers at function calls in the CompCert C and ↵xleroy2011-07-141-2/+1
| | | | | | Clight semantics git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1680 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of branch "unsigned-offsets":xleroy2011-04-091-5/+7
| | | | | | | | | | | | | | - In pointer values "Vptr b ofs", interpret "ofs" as an unsigned int. (Fixes issue with wrong comparison of pointers across 0x8000_0000) - Revised Stacking pass to not use negative SP offsets. - Add pointer validity checks to Cminor ... Mach to support the use of memory injections in Stacking. - Cleaned up Stacklayout modules. - IA32: improved code generation for Mgetparam. - ARM: improved code generation for op-immediate instructions. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1632 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Special case for while(1), for(..., 1, ...) and do ... while(0) loops.xleroy2011-03-151-17/+49
| | | | | | | | Don't wait until Constprop to get rid of trivial loop tests; instead, produces better-looking Cminor. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1610 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Float.intoffloat and Float.intuoffloat are now partial functions.xleroy2010-10-281-2/+13
| | | | | | | (May fail if float is too big to be converted.) git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1544 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Removed useless constraints on return type at Sreturn instructionsxleroy2010-08-181-2/+4
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1470 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of branches/full-expr-4:xleroy2010-08-181-0/+1869
- 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
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