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* Change the way the debug sections are printed.Bernhard Schommer2015-09-282-2/+2
| | | | | | If a user uses the #pragma use_section for functions the diab linker requires a separate debug_info section for each entry. This commit adds functionality to emulate this behavior.
* Added support for the locations of stack allocated local variables.Bernhard Schommer2015-09-252-0/+2
| | | | | This commit adds furher support for location information for local variables and starts with the implementation of the debug_loc section.
* Renaming {BA,BR}_longofwords -> {BA,BR}_splitlong.Xavier Leroy2015-08-223-16/+16
| | | | | | | | Use EF_debug instead of EF_annot for line number annotations. Introduce PrintAsmaux.print_debug_info (very incomplete). powerpc/Asmexpand: revise expand_memcpy_small.
* Refactoring of builtins and annotations in the back-end.Xavier Leroy2015-08-213-358/+297
| | | | | | | | | | | | | | | | | | | | | | | | Before, the back-end languages had distinct instructions - Iannot for annotations, taking structured expressions (annot_arg) as arguments, and producing no results' - Ibuiltin for other builtins, using simple pseudoregs/locations/registers as arguments and results. This branch enriches Ibuiltin instructions so that they take structured expressions (builtin_arg and builtin_res) as arguments and results. This way, - Annotations fit the general pattern of builtin functions, so Iannot instructions are removed. - EF_vload_global and EF_vstore_global become useless, as the same optimization can be achieved by EF_vload/vstore taking a structured argument of the "address of global" kind. - Better code can be generated for builtin_memcpy between stack locations, or volatile accesses to stack locations. Finally, this commit also introduces a new kind of external function, EF_debug, which is like EF_annot but produces no observable events. It will be used later to transport debug info through the back-end, without preventing optimizations.
* Represent external worlds by a coinductive type rather than an inductive type.Xavier Leroy2015-06-071-1/+1
| | | | As noticed by R. Krebbers, an inductive type for external worlds implies that all sequences of program-world interactions are finite, which is not the case.
* In AST.calling_conventions, record whether the original C function was ↵Xavier Leroy2015-05-221-3/+4
| | | | | | "old-style" unprototyped. Use this info in printing function types for Csyntax and Clight.
* Extended inline asm: revised treatment of clobbered registers.Xavier Leroy2015-05-091-2/+2
| | | | | | | | | | - Treat clobbered registers as being destroyed by EF_inline_asm builtins (which is the truth, semantically). - To enable the above, represent clobbers as Coq strings rather than idents and move register_by_name from Machregsaux.ml to Machregs.v. - Side benefit: more efficient implementation of Machregsaux.name_of_register. -# Please enter the commit message for your changes. Lines starting
* Typo: Val.sun_inject -> Val.sub_inject.Xavier Leroy2015-05-061-1/+1
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* Long-overdue renaming: val_inject -> Val.inject, etc, for consistency with ↵Xavier Leroy2015-04-305-111/+113
| | | | Val.lessdef, etc.
* Support for GCC-style extended asm, continued:Xavier Leroy2015-04-213-5/+6
| | | | | | | | - support "r", "m" and "i" constraints - support "%Q" and "%R" modifiers for register pairs - support register clobbers - split off analysis and transformation of asm statements in cparser/ExtendedAsm.ml
* Experiment: support a subset of GCC's extended asm statements.Xavier Leroy2015-04-173-8/+8
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* Merge branch 'master' into dwarfBernhard Schommer2015-04-024-46/+249
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| * Merge pull request #34 from AbsInt/extended-annotationsXavier Leroy2015-04-014-29/+216
| |\ | | | | | | Extended annotations
| | * Updated the Caml part. Added some more tests in annot1.c.Xavier Leroy2015-03-271-2/+4
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| | * Extended arguments to annotations, continued:Xavier Leroy2015-03-272-34/+6
| | | | | | | | | | | | | | | - Simplifications in RTLgen. - Updated Cexec.
| | * Extend annotations so that they can keep track of global variables and local ↵Xavier Leroy2015-03-273-29/+242
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | variables whose address is taken. - CminorSel, RTL: add "annot" instructions. - CminorSel to Asm: use type "annot_arg" for arguments of "annot" instructions. - AST, Events: simplify EF_annot because constants are now part of the arguments. Implementation is not complete yet.
| * | Revised semantics of comparisons between a pointer and 0.Xavier Leroy2015-03-151-17/+33
| |/ | | | | | | | | | | | | | | | | | | | | It used to be that a pointer value (Vptr) always compare unequal to the null pointer (Vint Int.zero). However, this may not be true in the final machine code when pointer addition overflows and wraps around to the bit pattern 0. This patch checks the validity of the pointer being compared with 0, and makes the comparison undefined if the pointer is out of bounds. Note: only the IA32 back-end was updated, ARM and PowerPC need updating.
* | Started integrating the debug printing in the common backend_printer.Bernhard Schommer2015-03-112-2/+2
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* | Starting to remove the seperate printers for each backend.Bernhard Schommer2015-02-022-0/+4
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* Add weaker variants of theorems find_funct_ptr_exists and find_var_exists.Xavier Leroy2015-01-231-70/+122
| | | | | | | | Instead of assuming name uniqueness for all definitions in the program, these variants only assume uniqueness for a particular name. Use this approach to weaken the hypotheses for match_program and transf_program_partial_augment.
* Merge branch 'named-structs'Xavier Leroy2015-01-234-177/+260
|\ | | | | | | | | | | | | | | | | | | | | | | | | - Switch CompCert C / Clight AST of composite types (structs and unions) from a structural representation to a nominal representation, closer to concrete syntax. - This avoids algorithmic inefficiencies due to the structural representation. - Closes PR#4. - Smallstep: make small-step semantics more polymorphic in the type of the global environment. - Globalenvs: introduce Senv.t (symbol environments) as a restricted view on Genv.t (full global environments). - Events, Smallstep: use Senv instead of Genv to talk about global names.
| * Make small-step semantics more parametric w.r.t. the type of global ↵Xavier Leroy2014-11-262-27/+42
| | | | | | | | environments. Use symbol environments for the part of semantics that deals with observable events.
| * Introduce symbol environments (type Senv.t) as a restricted view on global ↵Xavier Leroy2014-11-262-150/+218
| | | | | | | | environments (type Genv.t). Use symbol environments instead of global environments for external functions (module Events).
* | Clean up support for common symbols. Uninitialized "const" symbols can be ↵Xavier Leroy2014-12-172-8/+8
|/ | | | common.
* Add Genv.public_symbol operation.Xavier Leroy2014-11-244-180/+342
| | | | | Restrict pointer event values to public global names. Update proofs accordingly. PowerPC and ARM need updating.
* Record public global definitions via field "prog_public" in AST.program.Xavier Leroy2014-11-241-3/+25
| | | | For the moment, this field is ignored.
* Excessively strict validation: ofs + sz < modulus should have beenxleroy2014-08-201-4/+5
| | | | | | | ofs + sz <= modulus. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2607 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Issue with switch labels that are negative 32-bit integers.xleroy2014-08-171-0/+35
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2567 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* - Support "switch" statements over 64-bit integersxleroy2014-08-172-171/+264
| | | | | | | | | | | | | (in CompCert C to Cminor, included) - Translation of "switch" to decision trees or jumptables made generic over the sizes of integers and moved to the Cminor->CminorSel pass instead of CminorSel->RTL as before. - CminorSel: add "exitexpr" to support the above. - ValueDomain: more precise analysis of comparisons against an integer literal. E.g. "x >=u 0" is always true. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2565 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Add Mem.free_parallel_inject and use it to simplify Events a bit.xleroy2014-07-313-35/+50
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2556 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Update "read_as_zeros" property.xleroy2014-07-231-1/+3
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2538 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of "newspilling" branch:xleroy2014-07-238-504/+602
| | | | | | | | | | | | | | | - Support single-precision floats as first-class values - Introduce chunks Many32, Many64 and types Tany32, Tany64 to support saving and restoring registers without knowing the exact types (int/single/float) of their contents, just their sizes. - Memory model: generalize the opaque encoding of pointers to apply to any value, not just pointers, if chunks Many32/Many64 are selected. - More properties of FP arithmetic proved. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2537 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Add "read_as_zero" property for memory areas initialized by Init_space.xleroy2014-06-301-14/+106
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2519 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Refactoring: move symbol_offset into Genv.xleroy2014-05-241-0/+17
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2503 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of branch linear-typing:xleroy2014-04-061-0/+435
| | | | | | | | | | | | | | | | | | | | | | | 1) Revised division of labor between RTLtyping and Lineartyping: - RTLtyping no longer keeps track of single-precision floats, switches from subtype-based inference to unification-based inference. - Unityping: new library for unification-based inference. - Locations: don't normalize at assignment in a stack slot - Allocation, Allocproof: simplify accordingly. - Lineartyping: add inference of locations that contain a single-precision float. - Stackingproof: adapted accordingly. This addresses a defect report whereas RTLtyping was rejecting code that used a RTL pseudoreg to hold both double- and single-precision floats (see test/regression/singlefloats.c). This corresponds to commits 2435+2436 plus improvements in Lineartyping. 2) Add -dtimings option to measure compilation times. Moved call to C parser from Elab to Parse, to make it easier to measure parsing time independently of elaboration time. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2449 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Revert commits r2435 and r2436 (coarser RTLtyping / finer Lineartyping):xleroy2014-03-281-435/+0
| | | | | | | the new Lineartyping can't keep track of single floats that were spilled. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2438 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Revised division of labor between RTLtyping and Lineartyping:xleroy2014-03-271-0/+435
| | | | | | | | | | | | | | | | | - RTLtyping no longer keeps track of single-precision floats, switches from subtype-based inference to unification-based inference. - Unityping: new library for unification-based inference. - Locations: don't normalize at assignment in a stack slot - Allocation, Allocproof: simplify accordingly. - Lineartyping: add inference of machine registers that contain a single-precision float. - Stackingproof: adapted accordingly. This addresses a defect report by D. Dickman whereas RTLtyping was rejecting code that used a RTL pseudoreg to hold both double- and single-precision floats. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2435 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Type-checking of builtin volatile write Mfloat32 was too strict, causing ↵xleroy2014-03-242-4/+4
| | | | | | type errors after optimization. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2434 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* - Back to origins: suppress Mfloat64al32 chunk and align Mfloat64 to 4.xleroy2014-01-125-23/+16
| | | | | | | - Revised printing of intermediate RTL code. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2403 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Introduce and use the platform-specific Archi module giving:xleroy2014-01-032-26/+26
| | | | | | | | | | - endianness - alignment constraints for 8-byte types (which is 4 for x86 ABI and 8 for other ABIs) - NaN handling options (superceding the Nan module, removed). git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2402 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Ctypes.sizeof ty = 0 for empty types ty (zero-sized array, empty struct/union).xleroy2013-12-302-21/+111
| | | | | | | __builtin_memcpy_aligned now supports the case sz = 0. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2392 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Simpler, more robust emulation of calls to variadic functions:xleroy2013-12-282-26/+44
| | | | | | | | | | | | | | - C function types and Cminor signatures annotated by calling conventions. esp. vararg / not vararg - Cshmgen: generate correct code for function call where there are more arguments than listed in the function prototype. This is still undefined behavior according to the formal semantics, but correct code is generated. - C2C, */PrintAsm.ml: remove "printf$iif" hack. - powerpc/, checklink/: don't generate stubs for variadic functions. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2386 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of branch value-analysis.xleroy2013-12-203-68/+157
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2381 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Revised semantics of external functions, continued:xleroy2013-11-181-3/+10
| | | | | | | | | - Also axiomatize the semantics of inline asm - In Cexec, revised parameterization over do_external_function - In Interp.ml, matching changes + suppression of Interp_ext.ml git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2370 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Revised modeling of external functions and built-in functions: just axiomatizexleroy2013-11-171-114/+25
| | | | | | | them. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2369 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* powerpc/: new unary operation "addsymbol"xleroy2013-11-172-18/+28
| | | | | | | | Support far-data addressing in sections. (Currently ignored in checklink.) git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2368 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Cminor parsing and printing (from Andrew Tolmach)xleroy2013-10-161-4/+4
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2345 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of Flocq version 2.2.0.xleroy2013-08-021-5/+0
| | | | | | | More precise modeling of NaNs. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2303 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Alternate characterization of alignment constraints in memory injection, ↵xleroy2013-07-311-107/+108
| | | | | | which works better than the old one for the VST project. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2302 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Optimize integer divisions by positive constants, turning them intoxleroy2013-07-291-0/+12
| | | | | | | multiply-high and shifts. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2300 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
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