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.
35 lines
1.5 KiB
Plaintext
35 lines
1.5 KiB
Plaintext
// Dead statements after a block-terminating statement (`return` / `raise`) are
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// dropped instead of being emitted into the already-closed basic block.
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// Regression (issue 0061): a bare `return X;` / `raise` mid-block closed the
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// LLVM basic block but lowering kept emitting the trailing statements into it
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// → "Terminator found in the middle of a basic block". The canonical failable
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// closure form `{ raise error.X; return x; }` tripped this, blocking ERR E5.1.
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//
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// The fix must NOT over-reach: a CONDITIONAL `if cond { return }` (and the
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// `inline if` pack form) leaves a fresh merge block, so its trailing statements
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// must still run — exercised by `clamp` / `pick` below.
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#import "modules/std.sx";
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E :: error { Neg }
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// dead `return 99;` after an unconditional return
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const_one :: () -> i64 { return 1; return 99; }
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// dead `return x;` after an unconditional raise (the failable closure shape)
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always_raise :: (x: i64) -> (i64, !E) { raise error.Neg; return x; }
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// guard: a conditional return must still fall through to the trailing return
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clamp :: (x: i64) -> i64 { if x > 10 { return 10; } return x; }
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main :: () -> i32 {
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print("const_one={}\n", const_one()); // 1
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print("raised={}\n", always_raise(5) catch (e) 0); // 0
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print("clamp_hi={}\n", clamp(42)); // 10
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print("clamp_lo={}\n", clamp(7)); // 7
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// dead code after a `return` at main's own block level is dropped.
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return 0;
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print("unreachable\n")
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}
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