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Fix #7414

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This commit is contained in:
gingerBill
2026-08-22 18:17:41 +01:00
parent e83dc03b39
commit 11e41860d9
1 changed files with 23 additions and 3 deletions
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26
src/llvm_backend_asm.cpp
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@@ -216,12 +216,32 @@ struct lbAsmGenerate {
}
add_input_value(&param_types, &call_args, v.value);
break;
case AsmTemplateEntityDecl_Immediate:
raw("i"); // TODO: "n" if a known-constant integer is required
add_input_value(&param_types, &call_args, v.value);
case AsmTemplateEntityDecl_Immediate: {
Type *ct = core_type(v.type);
LLVMValueRef imm = v.value;
if (is_type_float(ct)) {
// NOTE(bill): No float-immediate constraint exists;
// reinterpret the float's bits as an integer of the same width so
// the 'i' (integer immediate) constraint applies. The bitcast of a
// constant folds to a ConstantInt.
Type *int_type = t_u32;
switch (type_size_of(ct)) {
case 2: int_type = t_u16; break;
case 4: int_type = t_u32; break;
case 8: int_type = t_u64; break;
}
imm = LLVMBuildBitCast(p->module->const_dummy_builder, v.value, lb_type(m, int_type), "");
} else if (!is_type_integer(ct) && !is_type_pointer(ct) && !is_type_boolean(ct)) {
error(e.entity->token, "asm immediate operand '%.*s' must be an integer-typed constant, got %s",
LIT(e.entity->token.string), type_to_string(v.type));
}
raw("i");
add_input_value(&param_types, &call_args, imm);
break;
}
default:
GB_PANIC("asm: invalid input operand kind");
break;
}
}
op_number[i] = next_op++;