There's 4 classes of variables, depending on whether they have defs in
the source and destinatio...

Any Apply objects in the input are converted to Defs with empty def
lists.

The 'fpromote' instruction was renamed from 'fcvt_ftof', but the name
argument was not changed.

The check.sh script always runs the Python unittests with 'python', but
if 'python3' is in the p...

This is a work in progress. The 'legalizer.rs' file generated by
gen_legalizer.py is not used fo...

The InstructionFormat objects make their non-value operands available as
FormatField attributes ...

The Python tools pyliint, flake8, and mypy are only run if they exist in
$PATH.

Along with the mypy tool, this helps find bugs in the Python code
handling the instruction defin...

After rearranging the directory layout, some paths in documentation
needed updating.

Fix some t...

A extended value can now be changed to a third form: An alias of another
value. This is like a c...

Polymorphic single-result instructions don't always return the
controlling type variable as thei...

This makes it possible to use literal integers as arguments to
InstBuilder methods.

All scalar types are mapped to b1 which is usually what you want for a
scalar. Vector types have...

This given us better symmetry between the replace and insert builder operations:

dfg.replac...

The copy/spill/fill instructions will be used by the register allocator
for splitting live range...

The DataFlowGraph::replace(inst) method returns an instruction builder
that will replace an inst...

This instruction builder inserts an instruction at the cursor position.
We'll add other kinds of...

All the InstrBuilder methods now consume the builder, and the non-leaf
methods return the dfg mu...

Rewrite Builder uses in test cases to use this method and construct a
new builder for each instr...

Distinguish the lifetime of the Cursor and its referenced function
layout.

Use two separate fun...

All of the instruction format an opcode methods are emitted as an
InstBuilder trait instead of a...

These lifetimes all represent the lifetime of the Function.

We already have all the meta/**.py as dependencies.

RISC-V does not have a flags register, and thus no add-with-carry
instructions. Neither does MIP...

Also add support for parsing call and call_indirect instructions.

The make_inst_results() method now understands direct and indirect
calls, and can allocate resul...

These two tables are used to keep track of type signatures of function
calls as well as external...

Add a new IndirectCall instruction format which has a value callee as
well as the call arguments...

Use this source map method for assigning a location to any entity whose
source number is not exp...

The 'src' and 'tests' top-level directories now contain tools sources
and integration tests for ...

Give these crates each a more standard directory layout with sources in
a 'src' sub-sirectory an...

The 'lib/cretonne' directory will be the new root of a stand-alone
cretonne crate containg both ...

These test utilities have been subsumed by ir::Builder.

The Builder keeps track of a position in the layout and inserts new
instructions there.

Add ins...

Insert an EBB at the current position and switch to inserting
instructions there. Call the relev...

Symmetrical with the existing insert_ebb().

This method splits an EBB in two and moves trailing instructions to a
new EBB.

Insert an instruction at thecurrent cursor position.

A layout cursor can be used instead of an iterator to keep track of a
position in a basic block ...

The Builder provides a convenient interface for inserting instructions
into an extended basic bl...

In instruction formats that have multiple results AND boxed storage,
place the second_result fie...

The Rust type is usually the camel-cased name of the operand kind, but
there are variations, so ...

Implement the boxed storage of the UnaryImmVector instruction format.

These refer to external functions and function signatures declared in
the preamble. Since we're ...

Entity references in instruction format operands also have member names
in the InstructionData s...

This new module will gain more data types dealing with external function
calls.

The meta code generators need to be able to infer these too.

Share a single Cargo.lock and target directory at the repo top-level.

Enable syntax: iadd(x, y) which creates an Apply node.
Enable syntax: z << iadd(x, y) which crea...

The isplit_lohi instruction breaks an integer into two halves. This will
typically be used to ge...

Make room for 255 different type sets and 2^16 entries in the operand
constraints table.

These functions compute types with half or double the number of bits in
each lane.

Add a meta/check.sh script that runs unit tests before the syntax
linters.

Add unittest convert...

Allow limits on the smallest and largest integer type in the set, the
highest and lowest number ...

These classes are not very entangled with the rest of __init__, and
we'll be expanding them a bit.

This directive documents an instruction group and lists all instructions
contained in the group,...

This is the x86-style of borrow flags. ARM uses subtract-with-carry
which inverts the sense of t...

Integer addition with carry in/out/both.

Describe the basics of Rust-level tests, and go into more detail about
the file-level tests.

This test command sends each function through legalize_function() and
then filecheck.

All instructions with associated encodings are now annotated with
encoding information in a colu...

The # is a more conventional prefix for hexadecimal, and when ISA
information is not available, ...

Add a `needs_isa()` method to the SubTest trait, and pass a TargetIsa
trait object to those sub-...

Some tests are only applicable to specific ISAs. This can be indicated
with an ISA specification...

When constructing the Flags object from the Builder, don't consume it,
but take a reference inst...

There's only one way of parsing entity names correctly.

Instead of recognizing "function" as a keyword, simply match it as a
context-sensitive keyword i...

This basic version only fills in the encoding of already-legal
instructions. It doesn't have any...

This is a side-table of ISA-dependent information that will initially be
filled out by the legal...

These are simply forwards from the underlying Vec.

Function names display differently than normal strings since they need
quotes and escaping.

Mov...

The interpretation of an encoding depends on the target ISA, and so does
the proper printing of ...

These modules contain encoding tables, not the 'Encoding' struct.

Use the source map to track instruction locations instead.

The rewrite methods now take an AnyE...

Use the SourceMap for mapping during parsing too.

Also include the err! macro and make it usable outside the module.