This was a mistake from day one. This is the wrong abstraction layer to
do this in.
My alternate plan for this is to make all I/O operations require an IO
interface parameter, similar to how allocations require an Allocator
interface parameter today.
For module parsing and assembling, we will also need to know
all of the SPIR-V extensions and their instructions. This commit
updates the generator to generate those. Because there are
multiple instruction sets that each have a separate list of Opcodes,
no separate enum is generated for these opcodes. Additionally, the
previous mechanism for runtime instruction information, `Opcode`'s
`fn operands()`, has been removed in favor for
`InstructionSet.core.instructions()`.
Any mapping from operand to instruction is to be done at runtime.
Using a runtime populated hashmap should also be more efficient
than the previous mechanism using `stringToEnum`.
This fixes an issue with boostrapping the compiler using MSVC. There is a CircularBuffer with
an array of length 65536 initialized to undefined, and because the undefined path of `renderValue`
was using `StringLiteral` to render this, the resulting zig2.c would fail to compile using MSVC.
The solution was to move the already-existing array initializer path (used in the non-undefined path)
into StringLiteral, and make StringLiteral aware of the total length so it could decide between which
style of initialization to use. We prefer to use string literals if we can, as this results in the least
amount of emitted C source.
A pointer type already has an alignment, so this information does not
need to be duplicated on the function type. This already has precedence
with addrspace which is already disallowed on function types for this
reason. Also fixes `@TypeOf(&func)` to have the correct addrspace and
alignment.
This adds std.debug.SafetyLock and uses it in std.HashMapUnmanaged by
adding lockPointers() and unlockPointers().
This provides a way to detect when an illegal modification has happened and
panic rather than invoke undefined behavior.
