* add target_util.zig which has ported code from src/target.cpp
* Module gains an arena that owns memory used during initialization
that has the same lifetime as the Module. Useful for constructing
file paths and lists of strings that have mixed lifetimes.
- The Module memory itself is allocated in this arena. init/deinit
are modified to be create/destroy.
- root_name moves to the arena and no longer needs manual free
* implement the ability to invoke `zig clang` as a subprocess
- there are lots of TODOs that should be solved before merging
* Module now requires a Random object and zig_lib_dir
* Module now requires a path to its own executable or any zig
executable that can do `zig clang`.
* Wire up more CLI options.
* Module creates "zig-cache" directory and "tmp" and "o" subdirectories
("h" is created by the cache_hash)
* stubbed out some of the things linker code needs to do with TODO
prints
* delete dead code for computing compiler id. the previous commit
eliminated the need for it.
* add `zig translate-c` CLI option but it's not fully hooked up yet.
It should be possible for this to be fully wired up before merging
this branch.
* `zig targets` now uses canonical data for available_libcs
Instead, append a "dirty suffix" to the version string when there are
dirty git changes and use the version string as the compiler id.
This avoids a dependency on the cache hash system, and saves time on
first invocation of the compiler since it does not have to compute its
compiler id. It also saves time by not having to check the cache for a
saved compiler id.
* std.cache_hash exposes Hasher type
* std.cache_hash makes hasher_init a global const
* std.cache_hash supports cloning so that clones can share the same
open manifest dir handle as well as fork from shared hasher state
* start to populate the cache_hash for stage2 builds
* remove a footgun from std.cache_hash add function
* get rid of std.Target.ObjectFormat.unknown
* rework stage2 logic for resolving output artifact names by adding
object_format as an optional parameter to std.zig.binNameAlloc
* support -Denable-llvm in stage2 tests
* Module supports the use case when there are no .zig files
* introduce c_object_table and failed_c_objects to Module
* propagate many new kinds of data from CLI into Module and into
linker.Options
* introduce -fLLVM, -fLLD, -fClang and their -fno- counterparts.
closes#6251.
- add logic for choosing when to use LLD or zig's self-hosted linker
* stub code for implementing invoking Clang to build C objects
* add -femit-h, -femit-h=foo, and -fno-emit-h CLI options
* Add a size_hint parameter to the read{toEnd,File}AllocOptions fns
* Rename readAllAlloc{,Options} to readToEndAlloc{,Options} as they
don't rewind the file before reading
* Fix missing rewind in test case
Added std.coff.MachineType
Added image characteristic and section flag valued to std.coff
Added std.Target.Cpu.Arch.toCoffMachine
Fixed stage2 --watch flag on windows
* improve the ZIR generated of variable decls
- utilize the same ZIR for the type and init value when possible
- init value gets a result location with the variable type.
no manual coercion is required.
* no longer use return instructions to extract values out of comptime
blocks. Instead run the analysis and then look at the corresponding
analyzed instruction, relying on the comptime mechanism to report
errors when something could not be comptime evaluated.
`is_pub` added to `Fn` would cost us an additional 8
bytes of memory per function, which is a real bummer
since it's only 1 bit of information.
If we wanted to really remove this, I suspect we could
make this a function isPub() which looks at the AST of
the corresponding Decl and finds if the FnProto AST node
has the pub token. However I saw an easier approach -
The data of whether something is pub or not is actually
a property of a Decl anyway, not a function, so we can
look at moving the field into Decl. Indeed, doing this,
we see that Decl already has deletion_flag: bool which
is hiding in the padding bytes between the enum (1 byte)
and the following u32 field (generation). So if we put
the is_pub bool there, it actually will take up no
additional space, with 1 byte of padding remaining.
This was an easy reworking of the code since any
func.is_pub could be changed simply to func.owner_decl.is_pub.
I also modified `Var` to make the init value non-optional
and moved the optional bit to a has_init: bool field. This is worse from
the perspective of control flow and safety, however it makes
`@sizeOf(Var)` go from 32 bytes to 24 bytes. The more code we can fit
into memory at once, the more justified we are in using the compiler as
a long-running process that does incremental updates.
Exports now have a dirty flag and are rewritten on flush if this flag
has been set.
A couple other minor changes have been made based on Andrew's review.
Thus far, we only generate the type, function, export, and code
sections. These are sufficient to generate and export simple functions.
Codegen is currently hardcoded to `i32.const 42`, the main goal of this
commit is to create infrastructure for the container format which will
work with incremental compilation.
This is part of an ongoing effort to reduce size of in-memory AST. This
enum flattening pattern is widespread throughout the self-hosted
compiler.
This is a API breaking change for consumers of the self-hosted parser.
* introduce a dump() function on Module.Fn which helpfully prints to
stderr the ZIR representation of a function (can be called before
attempting to codegen it). This is a debugging tool.
* implement x86 codegen for loops
* liveness: fix analysis of conditional branches. The logic was buggy
in a couple ways:
- it never actually saved the results into the IR instruction (fixed now)
- it incorrectly labeled operands as dying when their true death was
after the conditional branch ended (fixed now)
* zir rendering is enhanced to show liveness analysis results. this
helps when debugging liveness analysis.
* fix bug in zir rendering not numbering instructions correctly
closes#6021
