Summary:
The implementation of `llvm_struct_name` before this diff calls
`caml_copy_string`, which allocates, while the `result` local variable
points to a block allocated by `caml_alloc_small` that has not yet
been initialized. If the allocation in `caml_copy_string` triggers a
garbage collection, then the GC root `result` contains a pointer to
uninitialized data, which may crash the GC or lead to a memory
corruption.
This diff fixes this by allocating and initializing the string first
and then allocating and initializing the option, thereby leaving no
dangling pointers when allocations are made.
The conversion from a C string to an OCaml string option is refactored
into a function, `cstr_to_string_option`. This function is also used
to simplify the definitions of `llvm_get_mdstring` and
`llvm_string_of_const`.
Upstream Differential Revision: https://reviews.llvm.org/D99393
Reviewed By: ngorogiannis
Differential Revision: D27360848
fbshipit-source-id: f2daa7561
Summary:
There are a number of compilation warnings regarding disregarding
const qualifiers, and casting between pointers to integer types with
different sign.
The incompatible sign warnings are due to treating the result of
`LLVMGetModuleIdentifier` as `const unsigned char *`, but it is
declared as `const char *`.
The dropped const qualifiers are due to the code pattern
`memcpy(String_val(_),_,_)` which ought to be (following the
implementation of the OCaml runtime)
`memcpy((char *)String_val(_),_,_)`. The issue is that `String_val` is
usually used to get the value of an immutable string. But in the
context of the `memcpy` calls, the string is in the process of being
initialized, so is not yet constant.
Upstream Differential Revision: https://reviews.llvm.org/D99392
Reviewed By: ngorogiannis
Differential Revision: D27360846
fbshipit-source-id: d045ad7c0
Summary:
This diff uses ptr_to_option to convert a nullable C pointer to an
OCaml option instead of the redundant implementation in
llvm_global_initializer.
Upstream Differential Revision: https://reviews.llvm.org/D99391
Reviewed By: ngorogiannis
Differential Revision: D27360847
fbshipit-source-id: b5bfcadf7
Summary:
The names of the compiled sledge executables are long, which is
inconvenient. Also, all build modes produce an executable named
`sledge`, so it is not possible to add them to PATH and still be able
to run the desired executable. This diff adds a directory of symbolic
links with different names that refer to the executables built in the
different build modes. The intent is for people to add .../sledge/bin
to their PATH.
Reviewed By: jvillard
Differential Revision: D27315805
fbshipit-source-id: 7e84e43a7
Summary:
These no-cmx-file warnings on libraries in dependencies do not seem to
be resolvable, and there is no smaller scope I can find to suppress
them.
Reviewed By: jvillard
Differential Revision: D27280739
fbshipit-source-id: 6e8886f7f
Summary:
This is a form of call only used with inline asm, so currently not
supported.
Reviewed By: jvillard
Differential Revision: D27280742
fbshipit-source-id: f286e7886
Summary:
Since the llvm bindings package has a setup step that is normally done
when pinning the opam package, to build when it is instead vendored
requires adding a setup step to the sledge build.
Reviewed By: martintrojer
Differential Revision: D27188295
fbshipit-source-id: edb0b317c
Summary: This patch exposes the predicate API of internalize pass to OCaml.
Reviewed By: jvillard
Differential Revision: D27188305
fbshipit-source-id: d53bf5871
Summary:
LLVMGetInitializer returns nullptr in case there is no
initializer. There is not much that can be done with nullptr in OCaml,
not even test if it is null. Also, there does not seem to be a C or
OCaml API to test if there is an initializer. So this diff changes
Llvm.global_initializer to return an option.
Reviewed By: jvillard
Differential Revision: D27188302
fbshipit-source-id: 3474ec840
Summary:
There are several enum values that have been added to LLVM-C that are
missing from the OCaml bindings.
Reviewed By: jvillard
Differential Revision: D27188299
fbshipit-source-id: 215f15469
Summary:
Add thin shims to OCaml interfaces to provide access to DebugLoc info
for Instructions, GlobalVariables and Functions.
Reviewed By: jvillard
Differential Revision: D27188296
fbshipit-source-id: 52129f957
Summary:
Add a vendored copy of llvm-dune, a dune-based build system for the
LLVM OCaml bindings.
Source: https://github.com/kit-ty-kate/llvm-dune
Reviewed By: jvillard
Differential Revision: D27188306
fbshipit-source-id: 89e9265e0
Summary:
Add a vendored copy of the LLVM cxxabi project.
The sledge models compile llvm's libcxxabi to bitcode, so that the
analyzer knows the real definitions of the e.g. exception handling
primitives. Before this diff, the sledge build relied on having a
clone of a fork of llvm in the sledge working tree. This diff is part
of enabling using the upstream llvm 11 library instead of the fork.
Source: https://github.com/llvm/llvm-project/tree/main/libcxxabi
Reviewed By: jvillard
Differential Revision: D27188298
fbshipit-source-id: dc76b0714
Summary:
This allows using the upsteam LLVM 11 library unchanged, only
extensions to the OCaml bindings are needed. Therefore this is to
enable building sledge using e.g. `dnf install llvm-11` or `brew
install llvm@11` instead of cloning and building a fork of llvm.
Reviewed By: jvillard
Differential Revision: D27188301
fbshipit-source-id: f441dbecd
Summary:
They only attach debug info to labels, and have no execution
behavior. At some later point it would be good to scan for these and
gather the attached debug info.
Reviewed By: jvillard
Differential Revision: D27262516
fbshipit-source-id: 2eb91a475
Summary:
Llair.Func.mk makes two passes over the CFG to resolve block parents,
jump destinations, and eliminate jumps to jumps. This is not
economical, but more importantly the current code mistakenly uses the
`retreating` metadata before it is set correctly. This diff combines
these passes into a single one, which also incorporates setting the
retreating field from Llair.Program.mk.
This avoids nontermination on code that contains immediate self-jumps
such as `L: goto L;` that LLVM 11 can now generate.
Reviewed By: jvillard
Differential Revision: D27262512
fbshipit-source-id: 0543ba669
Summary:
This warning (68) triggers when a function argument pattern depends on
mutable state, which prevents the remaining arguments from being
uncurried, causing additional closure allocations.
Reviewed By: jvillard
Differential Revision: D27188311
fbshipit-source-id: a43354e15
Summary:
Not all types of exceptions allowed by LLVM are currently
supported. The types of Resume args and LandingPad params must be
compatible, and so it only makes sense to check they the same
way.
Reviewed By: jvillard
Differential Revision: D27188307
fbshipit-source-id: c88cc46d0
Summary:
It is possible for the filename of a source location to be the empty
string. Fpath.v asserts when passed an empty string.
Reviewed By: jvillard
Differential Revision: D27188304
fbshipit-source-id: a7d73444b
Summary:
This script interoperates with the gllvm wrapper for clang that embeds
bitcode into native object files to support linking closed bitcode for
executables built with gllvm, also linking in the bitcode of needed
dynamic libraries.
Reviewed By: ngorogiannis
Differential Revision: D26903126
fbshipit-source-id: d4b95809a
Summary:
The only difference between `program` and `identified` variables is
terminology, technically they are redundant.
Reviewed By: jvillard
Differential Revision: D26451308
fbshipit-source-id: eb4e7be43
Summary:
Negating the ids of program variables leads to inverting the order on
them. This is logically fine, the order is still a valid total order.
But it can lead to choosing younger variables as equality class
representatives over older variables, and thereby lead to more churn
as adding an equality is more likely to cause a change of
representative, and hence additional normalizing rewrites.
Reviewed By: jvillard
Differential Revision: D26451304
fbshipit-source-id: eb20d1901
Summary:
It is not necessary to clear tables and sets that do not contain any
pointers to LLVM values.
Reviewed By: jvillard
Differential Revision: D26451306
fbshipit-source-id: 403c588fb
Summary:
Theory.solved is a list of pairs of terms representing solved
equalities. The order of the pairs is very important, which is not
apparent from the type. This diff introduces an oriented_equality type
to make this more clear.
Reviewed By: jvillard
Differential Revision: D26451303
fbshipit-source-id: 56a49e601
Summary:
Generalize the existing find_or_add and find_and_remove operations to
find_update. Slightly simplify the interfaces of change, update,
find_or_add, and find_and_remove, reducing the gap to the natural
underlying functionality.
Reviewed By: jvillard
Differential Revision: D26451305
fbshipit-source-id: 89f67c84d
Summary:
The normalization and then extension of the carrier can be combined
into one pass. This weakens the property that this normalization needs
to achieve, which yields a small simplification, and combining the
passes is a minor optimization.
Reviewed By: jvillard
Differential Revision: D26400406
fbshipit-source-id: 8a3cbb2de
Summary:
An invariant of `And` and `Or` formulas is that they are flattened,
that is, `And` formulas do not have positive immediate subformulas of
form `And` nor negative immediate subformulas of form `Or`, and
similarly for `Or`. This invariant is ensured by the formula
constructors, which scan the immediate subformulas for cases that need
to be flattened.
When mapping over formulas, this repeated scanning is a performance
bottleneck. Most of the work of flattening is wasted since the input
formulas are necessarily already in flattened form, and the common
case is that the transformation preserves the flattened form. This
diff optimizes this case by detecting violations of flattening during
the transformation, performing the needed flattening, and avoiding the
general constructor that scans for flattening violations.
Reviewed By: jvillard
Differential Revision: D26338014
fbshipit-source-id: 9f15cca58
Summary:
Update the first-order equality solver for the sequence theory to
avoid searching the whole representation now that the super-term index
is maintained.
Reviewed By: jvillard
Differential Revision: D26338015
fbshipit-source-id: 24a9a19b6
Josh Berdine