The HUD weapon/ammo-type icon (bottom-right, and bottom-left when
dual-wielding) stopped drawing ~2026-09-02; the ammo *numbers* still
render. Root cause: set_rgba_redirect_generate_microcode (gunfire.c, the
sole icon emitter) is non-void but has no return statement (the decomp
banner flags it). At -Og the tail call's result stayed in $v0 and it
worked; commit 7549570b restored -O2 for playtest builds, where the
undefined return register makes callers resume the DL from the icon's
start offset and overwrite the icon commands with the following
microcode_constructor / gunDrawHudInteger output.
Fix: add the return under AVOID_UB (already -D'd in the PC build;
CMakeLists.txt:207), N64 byte-match path unchanged under #else.
Codegen-correctness only, same class as the existing AVOID_UB edits.
Owed: build (-O2) + -level_09 capture diff vs docs/img/bunker1-2.png.
A/B: Debug build (-Og) shows the icon, -O2 build without this fix does not.
James Dansereau
a9d8e4d44c