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Sema: implement runtime safety checks for zirErrSetCast

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This commit is contained in:
William Sengir
2022-05-11 03:42:32 -07:00
parent 363cdb7d5f
commit 4a6aee9dbe
1 changed files with 11 additions and 3 deletions
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14
src/Sema.zig
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@@ -14271,10 +14271,18 @@ fn zirErrSetCast(sema: *Sema, block: *Block, extended: Zir.Inst.Extended.InstDat
}
try sema.requireRuntimeBlock(block, src);
if (block.wantSafety()) {
// TODO
if (block.wantSafety() and !dest_ty.isAnyError()) {
const err_int_inst = try block.addBitCast(Type.u16, operand);
// TODO: Output a switch instead of chained OR's.
var found_match: Air.Inst.Ref = undefined;
for (dest_ty.errorSetNames()) |dest_err_name, i| {
const dest_err_int = (try sema.mod.getErrorValue(dest_err_name)).value;
const dest_err_int_inst = try sema.addIntUnsigned(Type.u16, dest_err_int);
const next_match = try block.addBinOp(.cmp_eq, dest_err_int_inst, err_int_inst);
found_match = if (i == 0) next_match else try block.addBinOp(.bool_or, found_match, next_match);
}
try sema.addSafetyCheck(block, found_match, .invalid_error_code);
}
return block.addBitCast(dest_ty, operand);
}