- Rewrite the `is_immediate` methods in $ARCH/selection.ml in the style of
other selection methods: operations that need platform-dependent handling
are explicitly listed, all others fall through `super#is_immediate`.
- The `is_immediate` method from selectgen.ml knows how to handle shifts
(and no other operation). Remove the `select_shift_op` method,
now unnecessary.
- ARM: remove special cases for multiply and multiply-high, no longer
necessary.
- RISC-V: in emit.mlp, remove implementation of checkbound immediate,
which is no longer generated.
Rewrite check_scope_escape using proper marking and unmarking
This uses the Btype.snapshot/backtrack mechanism, to ensure that we
always undo marking on types from the environment and to avoid a
`try ... with ...` construction for each recursive call.
This commit simplifies a few integer constants that were obfuscated so
as to pass compilation on a 32-bit host, as "make check_all_arches"
would do if ran on a 32-bit host. However, "make check_all_arches"
does not run on 32-bit hosts, unlike what is claimed in comments.
More generally, 32-bit hosts are no longer used for developing OCaml and
will not be used for cross-compilation. So, let's not complicate the
back-ends unnecessarily.
- Support a wider range of immediate values for ADD and SUB,
using two instructions when needed (add/sub middle 12 bits then low 12 bits).
- Do not rely on the assembler to convert CMP immediate negative to
CMN immediate.
Replace the a single `is_immediate n` method that is supposed to apply
to all arithmetic instructions by two methods:
`is_immediate op n` : tests whether `n` is in the range of supported
immediate arguments for integer operation `op`
`is_immediate_test cmp n` : tests whether `n` is in the range of supported
immediate arguments for integer comparison `cmp`
This makes it easier to handle operations without immediate operands
(e.g. multiply or multiply-high on many platforms) and operations with
specific ranges of immediate operands (e.g. N-bit unsigned versus
N-bit signed). Before, these operations had to be treated as special
cases in the platform-specific `select_operation` method.
This is a wrapper around the _exit system call. It has been implemented
in otherlibs/unix/exit.c for a long time but never exported.
This commit exports and documents it as `Unix._exit`.
The Unix implementation of `establish_server` is changed to use `_exit`
and to have gender-neutral comments.
A test was added to check that OCaml finalization actions are not performed.
Daniel Bünzli
David Allsopp
Thomas Refis
Brett Gilio
Xavier Leroy
Xavier Leroy
Gabriel Scherer
Matthew Ryan
Leo White
Sébastien Hinderer
Sadiq Jaffer
Florian Angeletti
Albin Coquereau