79:T7d6,## Summary Fixes #390. The same dynamic-array grow helper was duplicated across four files in `native/zero-c/src`: - `ir_grow_items` (`ir.c`), `lower_grow_items` (`program_graph_lower.c`), and `checker_grow_items` (`checker.c`) shared an **identical** body. - `ir_grow_tracked_items` (the variant that also accounts `ir->mir_bytes`) was defined **verbatim** in both `ir.c` and `program_graph_mir.c`. As the issue notes, the duplicated `mir_bytes` accounting can silently diverge if one copy is edited without the others. ## Change Hoist both helpers into `include/zero.h` as shared `static inline` functions (`z_grow_items` and `ir_grow_tracked_items`), placed right after the `IrProgram` definition so the tracked variant can reference `ir->mir_bytes`. The five local definitions are removed and their call sites repointed at the shared helpers. Pure refactor — the helper bodies are byte-for-byte the originals, so there is no behavior change. Net `+61 / -81` lines across 5 files. ## Validation - `make -C native/zero-c` builds **clean** under `-Wall -Wextra -Wpedantic`. - Host-target end-to-end works: `zero build --emit exe --target linux-x64` on `conformance/run/pass/hello.graph` produces an exe that runs and prints the expected output. - All `conformance/check/pass/*.graph` fixtures pass `zero check` (this is the path that exercises the modified `checker.c` and `ir.c` lowering). > Transparency per `AGENTS.md`: I developed this on Linux (Ubuntu via WSL) where > the `linux-x64` host target is fully runnable, but `pnpm run agent:checks` > could not complete because the `linux-musl-x64` build steps require a > musl-capable C compiler that isn't installed in my environment. That step > fails **identically on a clean checkout** (`BLD003: cross target > 'linux-musl-x64' requires a target-capable C compiler ... install the > bundled-toolchain default`), so it is pre-existing and unrelated to this > change. CI (with the musl toolchain) should exercise the full matrix. 7a:T482,refactor(zero-c): consolidate duplicated dynamic-array grow helpers (#390) The same dynamic-array grow helper was duplicated across four files in native/zero-c/src: ir_grow_items (ir.c), lower_grow_items (program_graph_lower.c) and checker_grow_items (checker.c) shared an identical body, and ir_grow_tracked_items was defined verbatim in both ir.c and program_graph_mir.c. As noted in #390, the duplicated mir_bytes accounting can silently diverge if one copy is edited without the others. Hoist both into include/zero.h as shared `static inline` helpers (z_grow_items and ir_grow_tracked_items), placed after the IrProgram definition so the tracked variant can reference ir->mir_bytes, and drop the five local definitions, repointing call sites at the shared helpers. Pure refactor; no behavior change. Validation: native/zero-c builds clean under -Wall -Wextra -Wpedantic; host-target (linux-x64) build+run works; all conformance check graph fixtures pass `zero check`. The linux-musl-x64 build steps in agent:checks fail identically on a clean checkout in this environment (BLD003: no musl-capable C compiler installed), unrelated to this change. 7b:T6d2,## Pull request overview > [!NOTE] > Copilot was unable to run its full agentic suite in this review. Refactors dynamic array growth helpers by centralizing them into shared inline functions, reducing duplicated logic across several C source files. **Changes:** - Removed per-file `*_grow_items` helpers in `ir.c`, `program_graph_lower.c`, `checker.c`, and `program_graph_mir.c`. - Introduced shared `z_grow_items` (and `ir_grow_tracked_items`) helpers in `include/zero.h`. - Updated call sites to use `z_grow_items`. ### Reviewed changes Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

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| File | Description | | ---- | ----------- | | native/zero-c/src/program_graph_mir.c | Removes local tracked grow helper in favor of shared header implementation. | | native/zero-c/src/program_graph_lower.c | Replaces local grow helper usage with `z_grow_items`. | | native/zero-c/src/ir.c | Removes local grow helpers and switches call sites to `z_grow_items`. | | native/zero-c/src/checker.c | Removes local grow helper and switches call sites to `z_grow_items`. | | native/zero-c/include/zero.h | Adds shared inline grow helpers (`z_grow_items`, `ir_grow_tracked_items`). |

--- 💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.7c:T6d2,## Pull request overview > [!NOTE] > Copilot was unable to run its full agentic suite in this review. Refactors dynamic array growth helpers by centralizing them into shared inline functions, reducing duplicated logic across several C source files. **Changes:** - Removed per-file `*_grow_items` helpers in `ir.c`, `program_graph_lower.c`, `checker.c`, and `program_graph_mir.c`. - Introduced shared `z_grow_items` (and `ir_grow_tracked_items`) helpers in `include/zero.h`. - Updated call sites to use `z_grow_items`. ### Reviewed changes Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

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Commits on Thu, Jun 11, 2026