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stage2 llvm backend: implement llvmType for error union and slices

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This commit is contained in:
Andrew Kelley 2021-07-25 19:06:48 -07:00
parent 5b4885fe89
commit c3d10dbda1
2 changed files with 23 additions and 4 deletions
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20
src/codegen/llvm.zig
View File

@ -534,7 +534,14 @@ pub const DeclGen = struct {
.Bool => return self.context.intType(1),
.Pointer => {
if (t.isSlice()) {
return self.todo("implement slices", .{});
var buf: Type.Payload.ElemType = undefined;
const ptr_type = t.slicePtrFieldType(&buf);
const fields: [2]*const llvm.Type = .{
try self.llvmType(ptr_type),
try self.llvmType(Type.initTag(.usize)),
};
return self.context.structType(&fields, 2, .False);
} else {
const elem_type = try self.llvmType(t.elemType());
return elem_type.pointerType(0);
@ -549,7 +556,7 @@ pub const DeclGen = struct {
var buf: Type.Payload.ElemType = undefined;
const child_type = t.optionalChild(&buf);
var optional_types: [2]*const llvm.Type = .{
const optional_types: [2]*const llvm.Type = .{
try self.llvmType(child_type),
self.context.intType(1),
};
@ -559,8 +566,16 @@ pub const DeclGen = struct {
}
},
.ErrorUnion => {
const error_type = t.errorUnionSet();
const payload_type = t.errorUnionPayload();
if (!payload_type.hasCodeGenBits()) {
return self.llvmType(error_type);
}
return self.todo("implement llvmType for error unions", .{});
},
.ErrorSet => {
return self.context.intType(16);
},
.ComptimeInt => unreachable,
.ComptimeFloat => unreachable,
.Type => unreachable,
@ -572,7 +587,6 @@ pub const DeclGen = struct {
.Float,
.Struct,
.ErrorSet,
.Enum,
.Union,
.Fn,

7
src/codegen/llvm/bindings.zig
View File

@ -35,7 +35,12 @@ pub const Context = opaque {
extern fn LLVMVoidTypeInContext(C: *const Context) *const Type;
pub const structType = LLVMStructTypeInContext;
extern fn LLVMStructTypeInContext(C: *const Context, ElementTypes: [*]*const Type, ElementCount: c_uint, Packed: Bool) *const Type;
extern fn LLVMStructTypeInContext(
C: *const Context,
ElementTypes: [*]const *const Type,
ElementCount: c_uint,
Packed: Bool,
) *const Type;
pub const constString = LLVMConstStringInContext;
extern fn LLVMConstStringInContext(C: *const Context, Str: [*]const u8, Length: c_uint, DontNullTerminate: Bool) *const Value;