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add compile error for intToPtr with a 0-bit ptr 

See #323
master
Andrew Kelley 2017-04-17 19:28:33 -04:00
parent 216e14891e
commit 2e0b114fdc
2 changed files with 14 additions and 0 deletions
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7
src/ir.cpp
View File

@ -12473,6 +12473,13 @@ static TypeTableEntry *ir_analyze_instruction_int_to_ptr(IrAnalyze *ira, IrInstr
return ira->codegen->builtin_types.entry_invalid; return ira->codegen->builtin_types.entry_invalid;
} }
type_ensure_zero_bits_known(ira->codegen, dest_type);
if (!type_has_bits(dest_type)) {
ir_add_error(ira, dest_type_value,
buf_sprintf("type '%s' has 0 bits and cannot store information", buf_ptr(&dest_type->name)));
return ira->codegen->builtin_types.entry_invalid;
}
IrInstruction *target = instruction->target->other; IrInstruction *target = instruction->target->other;
if (type_is_invalid(target->value.type)) if (type_is_invalid(target->value.type))
return ira->codegen->builtin_types.entry_invalid; return ira->codegen->builtin_types.entry_invalid;

7
test/run_tests.cpp
View File

@ -1895,6 +1895,13 @@ export fn entry() {
const foo = Arch.x86; const foo = Arch.x86;
} }
)SOURCE", 1, ".tmp_source.zig:3:21: error: container 'Arch' has no member called 'x86'"); )SOURCE", 1, ".tmp_source.zig:3:21: error: container 'Arch' has no member called 'x86'");
add_compile_fail_case("int to ptr of 0 bits", R"SOURCE(
export fn foo() {
var x: usize = 0x1000;
var y: &void = @intToPtr(&void, x);
}
)SOURCE", 1, ".tmp_source.zig:4:31: error: type '&void' has 0 bits and cannot store information");
} }
////////////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////////