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* New backend pass "RRE": optimize (somewhat) redundant reloads introduced by ↵xleroy2011-08-164-20/+926
| | | | | | the Reload pass. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1713 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Locations.v: add Loc.diff_dec.xleroy2011-08-141-0/+9
| | | | | | | | ia32: lift restriction that 1st arg of ops cannot be ECX (could be useful for a future, better reloading strategy) git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1711 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* IA32 port: more faithful treatment of pseudoregister ST0.xleroy2011-08-087-142/+272
| | | | | | | Related general change: support for destroyed_at_moves. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1700 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of branch new-semantics: revised and strengthened top-level statements ↵xleroy2011-07-1519-134/+125
| | | | | | of semantic preservation. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1683 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Coloringaux: better cost estimate for annotation builtinsxleroy2011-06-141-0/+2
| | | | | | | Regression: more tests for annotations git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1675 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Add preference for annot_val builtinxleroy2011-06-142-4/+21
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1674 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Revised handling of annotation statements, and more generally built-in ↵xleroy2011-06-1322-76/+231
| | | | | | functions, and more generally external functions git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1672 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* powerpc/PrintAsm.ml arm/PrintAsm.ml: updated (no label elimination).xleroy2011-05-083-5/+133
| | | | | | | | | | Added -dmach option and corresponding printer for Mach code. CleanupLabelsproof.v: fixed for ARM Driver.ml: -E sends output to stdout; support for .s and .S source files. cparser/Elab.ml: spurious comment deleted. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1648 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Added pass CleanupLabels to remove unreferenced labels in a proved way.xleroy2011-05-083-0/+471
| | | | | | | | | | ia32/PrintAsm.ml: simplified accordingly; other PrintAsm.ml to be fixed. ia32/Asm.v: Pmov_ri can undef flags (if translated to xor) cparser/Ceval.ml: treat ~ in constant exprs git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1647 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Renamed Machconcr into Machsem.xleroy2011-04-095-1513/+16
| | | | | | | | Removed Machabstr and Machabstr2concr, now useless following the reengineering of Stacking. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1633 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of branch "unsigned-offsets":xleroy2011-04-0929-1359/+2115
| | | | | | | | | | | | | | - 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
* Updated for Coq 8.3pl1. Some cleanups in test/*/Makefile.xleroy2011-03-094-15/+6
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1597 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Float.intoffloat and Float.intuoffloat are now partial functions.xleroy2010-10-282-4/+4
| | | | | | | (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
* Various algorithmic improvements that reduce compile times (thanks Alexandre ↵xleroy2010-10-2713-64/+53
| | | | | | | | | | | | | | Pilkiewicz): - Lattice: preserve sharing in "combine" operation - Kildall: use splay heaps (lib/Heaps.v) for node sets - RTLgen: add a "nop" before loops so that natural enumeration of nodes coincides with (reverse) postorder - Maps: add PTree.map1 operation, use it in RTL and LTL. - Driver: increase minor heap size git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1543 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Typo in doc commentxleroy2010-09-211-2/+2
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1511 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of the reuse-temps branch:xleroy2010-09-0224-275/+637
| | | | | | | | | | | | - Reload temporaries are marked as destroyed (set to Vundef) across operations in the semantics of LTL, LTLin, Linear and Mach, allowing Asmgen to reuse them. - Added IA32 port. - Cleaned up float conversions and axiomatization of floats. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1499 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Integers: cleaned up bitwise operations, redefined shr, zero_ext and sign_extxleroy2010-08-211-3/+5
| | | | | | | | | as bitwise operations rather than arithmetic ones. CastOptimproof: fixed for ARM port. Other files: adapted to changes in Integers. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1472 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Nettoyages pour docxleroy2010-08-181-1/+1
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1471 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of branches/full-expr-4:xleroy2010-08-189-168/+1404
| | | | | | | | | | | | | | | | | | | | | | - 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
* Forgot to add this file. Part of the refactoring of $ARCH/$SYSTEM/Conventions.vxleroy2010-07-071-0/+251
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1372 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Support for inlined built-ins.xleroy2010-06-2948-210/+574
| | | | | | | | | | | | | AST: add ef_inline flag to external functions. Selection: recognize calls to inlined built-ins and inline them as Sbuiltin. CminorSel to Asm: added Sbuiltin/Ibuiltin instruction. PrintAsm: adapted expansion of builtins. C2Clight: adapted detection of builtins. Conventions: refactored in a machine-independent part (backend/Conventions) and a machine-dependent part (ARCH/SYS/Conventions1). git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1356 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merging the Princeton implementation of the memory model. Separate axioms ↵xleroy2010-06-281-0/+1
| | | | | | in file lib/Axioms.v. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1354 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Updated Caml parts to match new representation for global variables.xleroy2010-05-261-1/+2
| | | | | | | */PrintAsm.ml: watch out for large stack frames in Pallocframe. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1349 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* More faithful semantics for volatile reads and writes.xleroy2010-05-2319-25/+90
| | | | 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.xleroy2010-05-1020-16/+29
| | | | | | | | - 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
* Improved coalescing heuristics based on Hailperin's paper.xleroy2010-05-081-32/+49
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1338 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Removed an ADMITTED that was unused, fortunatelyxleroy2010-05-051-2/+0
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1333 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Pretty-printers for RTL and LTL. Not yet well integrated.xleroy2010-05-022-0/+228
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1332 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Compute spill costs.xleroy2010-05-021-8/+92
| | | | | | | Attempt coalescing between stack-allocated variables. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1331 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* In compilation of Sassign, avoid systematic move from a fresh temp.xleroy2010-05-023-105/+211
| | | | | | | | | Those moves are not always coalesced during coloring. The resulting smaller RTL code also reduces the load on the rest of the back-end. RTLgenspec.v: use spiffy saturateTrans tactic to speed up proof search. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1330 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Coloring: allow to exclude user-specified registers from allocation.xleroy2010-04-102-25/+42
| | | | | | | CPragmas (PPC/EABI only): add #pragma reserve_register git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1314 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Include targets of preference edges in all_interf_regs. Not needed for ↵xleroy2010-03-301-6/+8
| | | | | | correctness, but this way temporaries that have preferences but no interferences do not fall in the default case of Coloring.alloc_of_coloring. This used to create uncoalesced moves esp. on Arm. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1299 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* More resistant proofxleroy2010-03-281-1/+0
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1296 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Restored the big-step semantics for Cminorxleroy2010-03-111-125/+125
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1287 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of the newmem and newextcalls branches:xleroy2010-03-0730-842/+951
| | | | | | | | | | - 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
* Switching to the new C parser/elaborator/simplifierxleroy2010-03-031-5/+7
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1269 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Backtracking on commit 1220v1.6xleroy2010-01-1341-23329/+14
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1228 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* ajout branche allocation de registresblazy2010-01-0841-14/+23329
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1220 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* MAJ extraction after changes in Integersxleroy2009-12-161-1/+1
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1200 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Revised lib/Integers.v to make it parametric w.r.t. word size.xleroy2009-11-192-6/+6
| | | | | | | | | 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
* More realistic treatment of jump tables: show the absence of overflow when ↵xleroy2009-11-106-3/+13
| | | | | | accessing the table git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1172 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Added support for jump tables in back end.xleroy2009-11-1040-88/+380
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1171 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Coloringaux: make identifiers unique; special treatment of precolored xleroy2009-08-261-60/+132
| | | | | | | | | | nodes a la Appel and George. Maps: in PTree.combine, compress useless subtrees. Lattice: more efficient implementation of LPMap. Makefile: build profiling version git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1139 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Forgot to add some filesxleroy2009-08-182-0/+717
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1130 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* "val_match_approx_increasing" moved from mach-dep part to mach-indep part.xleroy2009-08-181-0/+11
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1128 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Refactoring of Constprop and Constpropproof into a machine-dependent part ↵xleroy2009-08-172-0/+680
| | | | | | and a machine-independent part. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1126 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Refactored Selection.v and Selectionproof.v into a machine-dependent part + ↵xleroy2009-08-171-0/+122
| | | | | | a machine-independent part. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1125 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Cil2Csyntax: added goto and labels; added assignment between structsxleroy2009-08-1614-349/+346
| | | | | | | | | | | | Kildall: simplified the interface Constprop, CSE, Allocation, Linearize: updated for the new Kildall RTL, LTL: removed the well-formedness condition on the CFG, it is no longer necessary with the new Kildall and it is problematic for validated optimizations. Maps: more efficient implementation of PTree.fold. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1124 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Distinguish two kinds of nonterminating behaviors: silent divergencexleroy2009-08-162-26/+34
| | | | | | | | | | | | | | and reactive divergence. As a consequence: - Removed the Enilinf constructor from traceinf (values of traceinf type are always infinite traces). - Traces are now uniquely defined. - Adapted proofs big step -> small step for Clight and Cminor accordingly. - Strengthened results in driver/Complements accordingly. - Added common/Determinism to collect generic results about deterministic semantics. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1123 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Update spill costs when coalescingxleroy2009-08-161-2/+3
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1121 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
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