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Fixes a logical merge conflict that I didn't notice before.
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Instead of freeing ZIR after semantic analysis, we keep it around so
that it can be used for comptime calls, inline calls, and generic
function calls. ZIR memory is now managed by the Decl arena.
Debug dump() functions are conditionally compiled; only available in
Debug builds of the compiler.
Add a test for an inline function call.
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* remove the -Ddump-zir thing. that's handled through --verbose-ir
* rework Fn to have an is_inline flag without requiring any more memory
on the heap per function.
* implement a rough first version of dumping typed zir (tzir) which is
a lot more helpful for debugging than what we had before. We don't
have a way to parse it though.
* keep track of whether the inline-ness of a function changes because
if it does we have to go update callsites.
* add compile error for inline and export used together.
inline function calls and comptime function calls are implemented the
same way. A block instruction is set up to capture the result, and then
a scope is set up that has a flag for is_comptime and some state if the
scope is being inlined.
when analyzing `ret` instructions, zig looks for inlining state in the
scope, and if found, treats `ret` as a `break` instruction instead, with
the target block being the one set up at the inline callsite.
Follow-up items:
* Complete out the debug TZIR dumping code.
* Don't redundantly generate ZIR for each inline/comptime function
call. Instead we should add a new state enum tag to Fn.
* comptime and inlining branch quotas.
* Add more test cases.
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This is the same as the previous commit but for Value instead of Type.
Add `Value.castTag` and note that it is preferable to call than
`Value.cast`. This matches other abstractions in the codebase.
Added a convenience function `Value.Tag.create` which really cleans up
the callsites of creating `Value` objects.
`Value` tags can now share payload types. This is in preparation for
another improvement that I want to do.
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* Move leb128 out of debug and remove trivial *mem functions as discussed in #5588
* Turns out one of the *Mem functions was used by MachO. Replaced with trivial use of FixedBufferStream.
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