d8076b9333
Surface rename of the signed integer family: s1..s64 become i1..i64
(u1..u64, usize, isize unchanged). 'string' keeps the s-prefix arm in
name classification; width parsing moves to the i-prefix arm next to
isize.
Internal TypeId tags follow the surface (.s8/.s16/.s32/.s64 ->
.i8/.i16/.i32/.i64), as do mono-key mangle fragments (ptr_i64,
tu_i64_bool) and all display/diagnostic formatting (i{d}).
Migrated in the same sweep: stdlib + examples + issue repros + FFI C
companions (shared symbol names like ffi_id_i64), expected
stdout/stderr/ir snapshots, specs.md, readme.md, CLAUDE.md/AGENTS.md,
implementation_plan.md, docs/, issue writeups. Vendored stb_image and
historical flow state left untouched.
zig build test: 426/426; examples suite: 595/595.
40 lines
1.4 KiB
Plaintext
40 lines
1.4 KiB
Plaintext
// Variadic heterogeneous type packs — control-flow follow-up to
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// issue-0045 fix (commit 9e78790).
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//
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// issue-0045's fix routes inline-comptime-body `return X;` into a
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// result slot so the caller's basic block isn't terminated
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// mid-flight. But the fix sets `block_terminated = true` after
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// the inline return — which leaks PAST the enclosing `if`'s
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// merge block. When the body shape is
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// if cond { return X; }
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// return Y;
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// only the then-branch's `return X;` runs; `block_terminated`
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// stays true in the merge block, so `lowerBlockValue`'s loop
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// exits before the trailing `return Y;` lowers. The trailing
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// return never stores into the slot — for the false-condition
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// path the load reads uninitialised stack memory.
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//
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// Pack-fn `..$args` is the shortest repro because `args.len`
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// gives a comptime-feeling test for the condition. The bug is
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// actually shape-agnostic — any comptime body with `if cond
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// { return X; }; return Y;` regresses the same way.
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//
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// `maybe()` with zero call-args takes the false branch and
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// should fall through to `return -1;`. Today it loads garbage
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// from the uninitialised slot.
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#import "modules/std.sx";
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maybe :: (..$args) -> i64 {
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if args.len > 0 {
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return 42;
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}
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return -1;
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}
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main :: () -> i32 {
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print("{}\n", maybe()); // expect -1
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print("{}\n", maybe(99)); // expect 42
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return 0;
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}
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