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Fix LLVM IR building for unreachable empty blocks.

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tritao 2025-12-17 09:33:22 +00:00
parent c98398a6c4
commit 7b79969574
1 changed files with 5 additions and 0 deletions
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5
sway-llvm/src/lib.rs
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@ -405,6 +405,11 @@ impl<'ctx, 'ir, 'eng> ModuleLowerer<'ctx, 'ir, 'eng> {
for inst_value in block.instruction_iter(self.ir) {
self.lower_instruction(inst_value)?;
}
// If lowering produced no terminator (e.g., unreachable empty blocks),
// make the IR structurally valid by injecting an explicit unreachable.
if bb.get_terminator().is_none() {
let _ = self.builder.build_unreachable();
}
}
self.current_block = None;