Nixyri/zig
1
0
Fork 0
mirror of https://github.com/ziglang/zig.git synced 2024-12-17 08:40:19 +00:00
Code Issues Packages Projects Releases Wiki Activity

allow C pointers to have alignment

Browse Source 
clang/gcc support pointer alignment attribute:
https://clang.llvm.org/docs/AttributeReference.html#align-value
This commit is contained in:
Andrew Kelley 2019-02-14 20:04:13 -05:00
parent cc7060d0d9
commit d5bbd74871
No known key found for this signature in database
GPG Key ID: 7C5F548F728501A9
3 changed files with 2 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
src/ir.cpp
View File

@ -5057,11 +5057,6 @@ static IrInstruction *ir_gen_pointer_type(IrBuilder *irb, Scope *scope, AstNode
IrInstruction *align_value;
if (align_expr != nullptr) {
if (ptr_len == PtrLenC) {
exec_add_error_node(irb->codegen, irb->exec, node,
buf_sprintf("[*c] pointers may not have align attribute"));
return irb->codegen->invalid_instruction;
}
align_value = ir_gen_node(irb, align_expr, scope);
if (align_value == irb->codegen->invalid_instruction)
return align_value;

4
test/compile_errors.zig
View File

@ -123,12 +123,8 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
\\export fn a() void {
\\ const T = [*c]Foo;
\\}
\\export fn b() void {
\\ const T = [*c]align(4) u8;
\\}
,
".tmp_source.zig:3:15: error: C pointers cannot point to non-C-ABI-compatible type 'Foo'",
".tmp_source.zig:6:15: error: [*c] pointers may not have align attribute",
);
cases.addTest(

4
test/stage1/behavior/type_info.zig
View File

@ -67,12 +67,12 @@ test "type info: C pointer type info" {
}
fn testCPtr() void {
const ptr_info = @typeInfo([*c]const i8);
const ptr_info = @typeInfo([*c]align(4) const i8);
expect(TypeId(ptr_info) == TypeId.Pointer);
expect(ptr_info.Pointer.size == TypeInfo.Pointer.Size.C);
expect(ptr_info.Pointer.is_const);
expect(!ptr_info.Pointer.is_volatile);
expect(ptr_info.Pointer.alignment == 1);
expect(ptr_info.Pointer.alignment == 4);
expect(ptr_info.Pointer.child == i8);
}