stage2: use indexes for Decl objects

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Rather than allocating Decl objects with an Allocator, we instead allocate
them with a SegmentedList. This provides four advantages:
 * Stable memory so that one thread can access a Decl object while another
   thread allocates additional Decl objects from this list.
 * It allows us to use u32 indexes to reference Decl objects rather than
   pointers, saving memory in Type, Value, and dependency sets.
 * Using integers to reference Decl objects rather than pointers makes
   serialization trivial.
 * It provides a unique integer to be used for anonymous symbol names,
   avoiding multi-threaded contention on an atomic counter.

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This commit is contained in:

Andrew Kelley

2022-04-19 21:51:08 -07:00

parent 4f527e5d36

commit f7596ae942

31 changed files with 2584 additions and 2181 deletions

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src/Module.zig

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