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Complete C ABI basic tests

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This commit is contained in:
David Gonzalez Martin 2025-03-02 15:38:17 -06:00
parent fb505ef88e
commit bc65985a30
10 changed files with 284 additions and 121 deletions
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6
src/LLVM.zig
View File

@ -806,6 +806,7 @@ pub const Argument = opaque {
pub const Value = opaque {
pub const get_type = api.LLVMTypeOf;
pub const get_kind = api.LLVMGetValueKind;
pub const set_alignment = api.LLVMSetAlignment;
pub const is_call_instruction = api.LLVMIsACallInst;
@ -1438,13 +1439,16 @@ pub fn object_generate(module: *Module, target_machine: *Target.Machine, generat
module.run_optimization_pipeline(target_machine, OptimizationPipelineOptions.default(.{ .optimization_level = optimization_level, .debug_info = @intFromBool(generate.debug_info) }));
}
// const mod_string = module.to_string();
// lib.print_string_stderr(mod_string);
const result = module.run_code_generation_pipeline(target_machine, CodeGenerationPipelineOptions{
.output_file_path = String.from_slice(generate.path),
.output_dwarf_file_path = .{},
.flags = .{
.code_generation_file_type = .object_file,
.optimize_when_possible = generate.optimize_when_possible,
.verify_module = @intFromBool(lib.optimization_mode == .Debug or lib.optimization_mode == .ReleaseSafe),
.verify_module = 1,
},
});

284
src/converter.zig
View File

@ -109,6 +109,45 @@ const Module = struct {
anonymous_pair_type_count: u32 = 0,
arena_restore_position: u64,
const AllocaOptions = struct {
type: *Type,
name: []const u8 = "",
alignment: ?c_uint = null,
};
pub fn create_alloca(module: *Module, options: AllocaOptions) *llvm.Value {
const alignment: c_uint = if (options.alignment) |a| a else @intCast(options.type.get_byte_alignment());
const v = module.llvm.builder.create_alloca(options.type.llvm.handle, options.name);
v.set_alignment(alignment);
return v;
}
const LoadOptions = struct {
type: *Type,
value: *llvm.Value,
alignment: ?c_uint = null,
};
pub fn create_load(module: *Module, options: LoadOptions) *llvm.Value {
const alignment: c_uint = if (options.alignment) |a| a else @intCast(options.type.get_byte_alignment());
const v = module.llvm.builder.create_load(options.type.llvm.handle, options.value);
v.set_alignment(alignment);
return v;
}
const StoreOptions = struct {
source: *llvm.Value,
destination: *llvm.Value,
alignment: c_uint,
};
pub fn create_store(module: *Module, options: StoreOptions) *llvm.Value {
const alignment = options.alignment;
const v = module.llvm.builder.create_store(options.source, options.destination);
v.set_alignment(alignment);
return v;
}
pub fn current_basic_block(module: *Module) *llvm.BasicBlock {
return module.llvm.builder.get_insert_block();
}
@ -146,6 +185,7 @@ const Module = struct {
};
const AttributeKindTable = struct {
@"align": llvm.Attribute.Kind,
byval: llvm.Attribute.Kind,
sret: llvm.Attribute.Kind,
};
@ -283,6 +323,7 @@ const Module = struct {
.attribute_kind_table = .{
.byval = llvm.lookup_attribute_kind("byval"),
.sret = llvm.lookup_attribute_kind("sret"),
.@"align" = llvm.lookup_attribute_kind("align"),
},
},
.arena_restore_position = arena_restore_position,
@ -968,8 +1009,8 @@ const Converter = struct {
fn emit_direct_coerce(module: *Module, ty: *Type, original_value: *Value) *llvm.Value {
const source_type = original_value.type;
const alloca = module.llvm.builder.create_alloca(source_type.llvm.handle, "");
_ = module.llvm.builder.create_store(original_value.llvm, alloca);
const alloca = module.create_alloca(.{ .type = source_type });
_ = module.create_store(.{ .source = original_value.llvm, .destination = alloca, .alignment = @intCast(source_type.get_byte_alignment()) });
const target_type = ty;
const target_size = ty.get_byte_size();
@ -981,7 +1022,7 @@ const Converter = struct {
if (source_size >= target_size and !source_is_scalable_vector_type and !target_is_scalable_vector_type) {
_ = source_alignment;
_ = target_alignment;
return module.llvm.builder.create_load(target_type.llvm.handle, alloca);
return module.create_load(.{ .type = target_type, .value = alloca });
} else {
@trap();
// const alignment = @max(target_alignment, source_alignment);
@ -1018,23 +1059,28 @@ const Converter = struct {
}
}
fn parse_call(noalias converter: *Converter, noalias module: *Module, callable: *Value) *Value {
const bb_raw_type = switch (callable.type.bb) {
.function => callable.type,
.pointer => |pointer| pointer,
fn parse_call(noalias converter: *Converter, noalias module: *Module, may_be_callable: *Value) *Value {
const llvm_callable = switch (may_be_callable.type.bb) {
.function => may_be_callable.llvm,
.pointer => module.create_load(.{ .type = may_be_callable.type, .value = may_be_callable.llvm }),
else => @trap(),
};
const function_type = &bb_raw_type.bb.function;
const raw_function_type = switch (may_be_callable.type.bb) {
.function => may_be_callable.type,
.pointer => may_be_callable.type.bb.pointer,
else => @trap(),
};
const function_type = &raw_function_type.bb.function;
const calling_convention = function_type.calling_convention;
const llvm_calling_convention = calling_convention.to_llvm();
var llvm_abi_argument_value_buffer: [64]*llvm.Value = undefined;
var abi_argument_count: usize = 0;
const llvm_indirect_return_value: ?*llvm.Value = switch (function_type.return_type_abi.kind) {
const llvm_indirect_return_value: *llvm.Value = switch (function_type.return_type_abi.kind) {
.indirect => |indirect| blk: {
if (indirect.alignment <= indirect.type.get_byte_alignment()) {
const alloca = module.llvm.builder.create_alloca(indirect.type.llvm.handle, "");
const alloca = module.create_alloca(.{ .type = indirect.type });
llvm_abi_argument_value_buffer[abi_argument_count] = alloca;
abi_argument_count += 1;
break :blk alloca;
@ -1042,7 +1088,7 @@ const Converter = struct {
@trap();
}
},
else => null,
else => undefined,
};
var semantic_argument_count: usize = 0;
@ -1079,11 +1125,12 @@ const Converter = struct {
if (pair_struct_type == semantic_argument_type) {
@trap();
} else {
const alloca = module.llvm.builder.create_alloca(if (semantic_argument_type.get_byte_alignment() < pair_struct_type.get_byte_alignment()) pair_struct_type.llvm.handle else semantic_argument_type.llvm.handle, "");
_ = module.llvm.builder.create_store(semantic_argument_value.llvm, alloca);
const alloca_type = if (semantic_argument_type.get_byte_alignment() < pair_struct_type.get_byte_alignment()) pair_struct_type else semantic_argument_type;
const alloca = module.create_alloca(.{ .type = alloca_type });
_ = module.create_store(.{ .source = semantic_argument_value.llvm, .destination = alloca, .alignment = @intCast(alloca_type.get_byte_alignment()) });
for (0..2) |i| {
const gep = module.llvm.builder.create_struct_gep(pair_struct_type.llvm.handle.to_struct(), alloca, @intCast(i));
const load = module.llvm.builder.create_load(pair[i].llvm.handle, gep);
const load = module.create_load(.{ .type = pair[i], .value = gep });
llvm_abi_argument_value_buffer[abi_argument_count] = load;
abi_argument_count += 1;
}
@ -1104,8 +1151,8 @@ const Converter = struct {
if (direct) {
@trap();
} else {
const alloca = module.llvm.builder.create_alloca(semantic_argument_type.llvm.handle, "");
_ = module.llvm.builder.create_store(semantic_argument_value.llvm, alloca);
const alloca = module.create_alloca(.{ .type = semantic_argument_type });
_ = module.create_store(.{ .source = semantic_argument_value.llvm, .destination = alloca, .alignment = @intCast(semantic_argument_type.get_byte_alignment()) });
llvm_abi_argument_value_buffer[abi_argument_count] = alloca;
abi_argument_count += 1;
}
@ -1117,7 +1164,7 @@ const Converter = struct {
assert(abi_argument_count == function_type.abi_argument_count);
const llvm_abi_argument_values = llvm_abi_argument_value_buffer[0..abi_argument_count];
const llvm_call = module.llvm.builder.create_call(bb_raw_type.llvm.handle.to_function(), callable.llvm, llvm_abi_argument_values);
const llvm_call = module.llvm.builder.create_call(raw_function_type.llvm.handle.to_function(), llvm_callable, llvm_abi_argument_values);
llvm_call.to_instruction().to_call().set_calling_convention(llvm_calling_convention);
@ -1139,6 +1186,8 @@ const Converter = struct {
llvm_add_argument_attribute(llvm_call, by_value_attribute, argument_type_abi.indices[0] + 1, .call);
}
const align_attribute = module.llvm.context.create_enum_attribute(module.llvm.attribute_kind_table.@"align", indirect.alignment);
llvm_add_argument_attribute(llvm_call, align_attribute, argument_type_abi.indices[0] + 1, .call);
// TODO: alignment
},
else => {},
@ -1147,22 +1196,31 @@ const Converter = struct {
const llvm_value = llvm_call;
if (llvm_indirect_return_value) |indirect_value| {
const result = module.values.add();
result.* = .{
.llvm = module.llvm.builder.create_load(function_type.semantic_return_type.llvm.handle, indirect_value),
.type = function_type.semantic_return_type,
.bb = .instruction,
};
return result;
} else {
const result = module.values.add();
result.* = .{
.llvm = llvm_value,
.type = function_type.semantic_return_type,
.bb = .instruction,
};
return result;
switch (function_type.return_type_abi.kind) {
.indirect => |indirect| {
const sret_attribute = module.llvm.context.create_type_attribute(module.llvm.attribute_kind_table.sret, indirect.type.llvm.handle);
llvm_add_argument_attribute(llvm_call, sret_attribute, 1, .call);
const align_attribute = module.llvm.context.create_enum_attribute(module.llvm.attribute_kind_table.@"align", indirect.alignment);
llvm_add_argument_attribute(llvm_call, align_attribute, 1, .call);
const result = module.values.add();
result.* = .{
.llvm = module.create_load(.{ .type = function_type.semantic_return_type, .value = llvm_indirect_return_value }),
.type = function_type.semantic_return_type,
.bb = .instruction,
};
return result;
},
else => {
const result = module.values.add();
result.* = .{
.llvm = llvm_value,
.type = function_type.semantic_return_type,
.bb = .instruction,
};
return result;
},
}
}
@ -1238,7 +1296,7 @@ const Converter = struct {
const local_type = local_type_inference orelse value.type;
const local_storage = module.values.add();
local_storage.* = .{
.llvm = module.llvm.builder.create_alloca(local_type.llvm.handle, local_name),
.llvm = module.create_alloca(.{ .type = local_type, .name = local_name }),
.type = local_type,
.bb = .local,
};
@ -1256,7 +1314,7 @@ const Converter = struct {
_ = di_builder.insert_declare_record_at_end(local_storage.llvm, local_variable, di_builder.null_expression(), debug_location, module.current_basic_block());
module.llvm.builder.set_current_debug_location(statement_debug_location);
}
_ = module.llvm.builder.create_store(value.llvm, local_storage.llvm);
_ = module.create_store(.{ .source = value.llvm, .destination = local_storage.llvm, .alignment = @intCast(local_type.get_byte_alignment()) });
const local = current_function.locals.add();
local.* = .{
@ -1285,8 +1343,8 @@ const Converter = struct {
.direct => {
module.llvm.builder.create_ret(return_value.llvm);
},
.indirect => {
_ = module.llvm.builder.create_store(return_value.llvm, current_function.return_pointer.llvm);
.indirect => |indirect| {
_ = module.create_store(.{ .source = return_value.llvm, .destination = current_function.return_pointer.llvm, .alignment = indirect.alignment });
_ = module.llvm.builder.create_ret_void();
},
.direct_coerce => |coerced_type| {
@ -1298,19 +1356,20 @@ const Converter = struct {
const anon_pair_type = module.get_anonymous_struct_pair(pair);
assert(return_value.type != anon_pair_type);
const alloca = module.llvm.builder.create_alloca(return_value.type.llvm.handle, "");
_ = module.llvm.builder.create_store(return_value.llvm, alloca);
const alloca = module.create_alloca(.{ .type = return_value.type });
_ = module.create_store(.{ .source = return_value.llvm, .destination = alloca, .alignment = @intCast(return_value.type.get_byte_alignment()) });
const source_is_scalable_vector_type = false;
const target_is_scalable_vector_type = false;
if (return_value.type.get_byte_size() >= anon_pair_type.get_byte_size() and !source_is_scalable_vector_type and !target_is_scalable_vector_type) {
@trap();
const load = module.create_load(.{ .type = anon_pair_type, .value = alloca });
module.llvm.builder.create_ret(load);
} else {
const alignment = @max(return_value.type.get_byte_alignment(), anon_pair_type.get_byte_alignment());
const temporal = module.llvm.builder.create_alloca(anon_pair_type.llvm.handle, "");
const temporal = module.create_alloca(.{ .type = anon_pair_type });
const size = module.integer_type(64, false).llvm.handle.to_integer().get_constant(return_value.type.get_byte_size(), @intFromBool(false));
_ = module.llvm.builder.create_memcpy(temporal, @intCast(alignment), alloca, @intCast(anon_pair_type.get_byte_alignment()), size.to_value());
const load = module.llvm.builder.create_load(anon_pair_type.llvm.handle, temporal);
const load = module.create_load(.{ .type = anon_pair_type, .value = temporal });
module.llvm.builder.create_ret(load);
}
},
@ -1393,10 +1452,10 @@ const Converter = struct {
if (left.type.bb != .pointer) {
converter.report_error();
}
const load_type = left.type.bb.pointer;
const right = converter.parse_value(module, load_type, .value);
const store_type = left.type.bb.pointer;
const right = converter.parse_value(module, store_type, .value);
_ = module.llvm.builder.create_store(right.llvm, left.llvm);
_ = module.create_store(.{ .source = right.llvm, .destination = left.llvm, .alignment = @intCast(store_type.get_byte_alignment()) });
},
';' => {
const is_noreturn = v.type.bb == .noreturn;
@ -1929,10 +1988,7 @@ const Converter = struct {
_ = converter.consume_character_if_match(',');
}
if (array.element_count) |ec| {
_ = ec;
@trap();
} else {
if (array.element_count == null) {
array.element_count = element_count;
ty.llvm = array_type_llvm(module, array);
ty.name = array_type_name(module.arena, element_count, array);
@ -2032,7 +2088,7 @@ const Converter = struct {
.value => {
const load = module.values.add();
load.* = .{
.llvm = module.llvm.builder.create_load(field.type.llvm.handle, gep),
.llvm = module.create_load(.{ .type = field.type, .value = gep }),
.type = field.type,
.bb = .instruction,
};
@ -2049,7 +2105,7 @@ const Converter = struct {
} else converter.report_error();
const field = bits.fields[field_index];
const bitfield_load = module.llvm.builder.create_load(bits.backing_type.llvm.handle, variable.value.llvm);
const bitfield_load = module.create_load(.{ .type = bits.backing_type, .value = variable.value.llvm });
const bitfield_shifted = module.llvm.builder.create_lshr(bitfield_load, bits.backing_type.llvm.handle.to_integer().get_constant(field.bit_offset, @intFromBool(false)).to_value());
const bitfield_masked = module.llvm.builder.create_and(bitfield_shifted, bits.backing_type.llvm.handle.to_integer().get_constant((@as(u64, 1) << @intCast(field.type.get_bit_size())) - 1, @intFromBool(false)).to_value());
@ -2076,7 +2132,7 @@ const Converter = struct {
.value => {
const load = module.values.add();
load.* = .{
.llvm = module.llvm.builder.create_load(variable.value.type.llvm.handle, variable.value.llvm),
.llvm = module.create_load(.{ .type = variable.value.type, .value = variable.value.llvm }),
.type = variable.value.type,
.bb = .instruction,
};
@ -2107,7 +2163,7 @@ const Converter = struct {
const load = module.values.add();
const load_type = variable.value.type.bb.array.element_type;
load.* = .{
.llvm = module.llvm.builder.create_load(load_type.llvm.handle, gep),
.llvm = module.create_load(.{ .type = load_type, .value = gep }),
.type = load_type,
.bb = .instruction,
};
@ -2132,7 +2188,7 @@ const Converter = struct {
.value => {
const load = module.values.add();
load.* = .{
.llvm = module.llvm.builder.create_load(variable.value.type.llvm.handle, variable.value.llvm),
.llvm = module.create_load(.{ .type = variable.value.type, .value = variable.value.llvm }),
.type = variable.value.type,
.bb = .instruction,
};
@ -2652,22 +2708,26 @@ fn llvm_emit_function_site_argument_attributes(noalias module: *Module, function
switch (argument_abi.kind) {
.direct => {},
.indirect => |indirect| switch (is_return) {
true => {
const sret_attribute = module.llvm.context.create_type_attribute(module.llvm.attribute_kind_table.sret, indirect.type.llvm.handle);
llvm_add_argument_attribute(function, sret_attribute, 1, .function);
llvm_add_argument_attribute(function, module.llvm.attribute_table.@"noalias", 1, .function);
.indirect => |indirect| {
const attribute_index = if (is_return) 1 else argument_abi.indices[0] + 1;
const align_attribute = module.llvm.context.create_enum_attribute(module.llvm.attribute_kind_table.@"align", indirect.alignment);
// TODO: alignment
},
false => {
if (argument_abi.attributes.by_value) {
const by_value_attribute = module.llvm.context.create_type_attribute(module.llvm.attribute_kind_table.byval, indirect.type.llvm.handle);
llvm_add_argument_attribute(function, by_value_attribute, argument_abi.indices[0] + @intFromBool(!is_return), .function);
}
switch (is_return) {
true => {
const sret_attribute = module.llvm.context.create_type_attribute(module.llvm.attribute_kind_table.sret, indirect.type.llvm.handle);
llvm_add_argument_attribute(function, sret_attribute, attribute_index, .function);
llvm_add_argument_attribute(function, module.llvm.attribute_table.@"noalias", attribute_index, .function);
llvm_add_argument_attribute(function, align_attribute, attribute_index, .function);
},
false => {
if (argument_abi.attributes.by_value) {
const by_value_attribute = module.llvm.context.create_type_attribute(module.llvm.attribute_kind_table.byval, indirect.type.llvm.handle);
llvm_add_argument_attribute(function, by_value_attribute, attribute_index, .function);
}
// TODO: alignment
},
llvm_add_argument_attribute(function, align_attribute, attribute_index, .function);
},
}
},
else => {},
}
@ -2882,7 +2942,6 @@ pub noinline fn convert(arena: *Arena, options: ConvertOptions) void {
};
}
},
// TODO: C calling convention
.c => {
// Return type abi
switch (options.target.cpu) {
@ -2938,12 +2997,7 @@ pub noinline fn convert(arena: *Arena, options: ConvertOptions) void {
if (high_part) |hp| {
const expected_result = Abi.SystemV.get_argument_pair(.{ result_type, hp });
const struct_type = module.get_anonymous_struct_pair(.{ result_type, hp });
if (struct_type.get_byte_alignment() == semantic_return_type.get_byte_alignment() and struct_type.get_byte_size() == semantic_return_type.get_byte_size()) {
break :ret_ty_abi .{ .kind = .direct };
} else {
break :ret_ty_abi expected_result;
}
break :ret_ty_abi expected_result;
} else {
// TODO
const is_type = true;
@ -3254,40 +3308,34 @@ pub noinline fn convert(arena: *Arena, options: ConvertOptions) void {
else => @trap(),
};
const llvm_storage = switch (lower_kind) {
.direct => d: {
const argument_alloca = if (lower_kind == .indirect) llvm_arguments[argument_abi.indices[0]].to_value() else module.create_alloca(.{ .type = semantic_argument.type, .name = semantic_argument.name });
const argument_alloca_alignment: c_uint = @intCast(semantic_argument.type.get_byte_alignment());
switch (lower_kind) {
.direct => {
assert(argument_abi_count == 1);
const argument_alloca = module.llvm.builder.create_alloca(semantic_argument.type.llvm.handle, semantic_argument.name);
const abi_argument_index = argument_abi.indices[0];
const llvm_argument = llvm_arguments[abi_argument_index];
_ = module.llvm.builder.create_store(llvm_argument.to_value(), argument_alloca);
break :d argument_alloca;
_ = module.create_store(.{ .source = llvm_argument.to_value(), .destination = argument_alloca, .alignment = argument_alloca_alignment });
},
.direct_pair => |pair| dp: {
.direct_pair => |pair| {
assert(argument_abi_count == 2);
const argument_alloca = module.llvm.builder.create_alloca(semantic_argument.type.llvm.handle, semantic_argument.name);
const abi_argument_index = argument_abi.indices[0];
const direct_pair_args = llvm_arguments[abi_argument_index..][0..2];
_ = module.llvm.builder.create_store(direct_pair_args[0].to_value(), argument_alloca);
_ = module.create_store(.{ .source = direct_pair_args[0].to_value(), .destination = argument_alloca, .alignment = argument_alloca_alignment });
const llvm_index_type = module.integer_type(32, false).llvm.handle.to_integer();
const struct_type = module.get_anonymous_struct_pair(pair);
const zero_index = llvm_index_type.get_constant(0, @intFromBool(false)).to_value();
const index = llvm_index_type.get_constant(1, @intFromBool(false)).to_value();
const gep = module.llvm.builder.create_gep(struct_type.llvm.handle, argument_alloca, &.{ zero_index, index });
_ = module.llvm.builder.create_store(direct_pair_args[1].to_value(), gep);
break :dp argument_alloca;
_ = module.create_store(.{ .source = direct_pair_args[1].to_value(), .destination = gep, .alignment = argument_alloca_alignment });
},
.indirect => ind: {
.indirect => {
assert(argument_abi_count == 1);
const argument_alloca = module.llvm.builder.create_alloca(semantic_argument.type.llvm.handle, semantic_argument.name);
break :ind argument_alloca;
},
.direct_coerce => |coerced_type| dc: {
.direct_coerce => |coerced_type| {
assert(coerced_type != semantic_argument.type);
assert(argument_abi_count == 1);
const argument_alloca = module.llvm.builder.create_alloca(semantic_argument.type.llvm.handle, semantic_argument.name);
switch (semantic_argument.type.bb) {
.@"struct" => |*struct_type| {
const is_vector = false;
@ -3295,7 +3343,7 @@ pub noinline fn convert(arena: *Arena, options: ConvertOptions) void {
if (coerced_type.get_byte_size() <= semantic_argument.type.get_byte_size() and !is_vector) {
assert(argument_abi_count == 1);
_ = module.llvm.builder.create_store(llvm_arguments[argument_abi.indices[0]].to_value(), argument_alloca);
_ = module.create_store(.{ .source = llvm_arguments[argument_abi.indices[0]].to_value(), .destination = argument_alloca, .alignment = argument_alloca_alignment });
} else {
@trap();
// const temporal = emit_local_symbol(&analyzer, thread, .{
@ -3326,21 +3374,19 @@ pub noinline fn convert(arena: *Arena, options: ConvertOptions) void {
if (bits.backing_type == coerced_type) {
const abi_argument_index = argument_abi.indices[0];
const llvm_argument = llvm_arguments[abi_argument_index];
_ = module.llvm.builder.create_store(llvm_argument.to_value(), argument_alloca);
_ = module.create_store(.{ .source = llvm_argument.to_value(), .destination = argument_alloca, .alignment = argument_alloca_alignment });
} else {
@trap();
}
},
else => @trap(),
}
break :dc argument_alloca;
},
};
}
const argument_value = module.values.add();
argument_value.* = .{
.llvm = llvm_storage,
.llvm = argument_alloca,
.type = semantic_argument.type,
.bb = .argument,
};
@ -3355,7 +3401,7 @@ pub noinline fn convert(arena: *Arena, options: ConvertOptions) void {
const parameter_variable = di_builder.create_parameter_variable(function_scope, semantic_argument.name, @intCast(argument_index + 1), module.llvm.file, semantic_argument.line, semantic_argument.type.llvm.debug, always_preserve, flags);
const inlined_at: ?*llvm.DI.Metadata = null; // TODO
const debug_location = llvm.DI.create_debug_location(module.llvm.context, semantic_argument.line, semantic_argument.column, function_scope, inlined_at);
_ = di_builder.insert_declare_record_at_end(llvm_storage, parameter_variable, di_builder.null_expression(), debug_location, module.current_basic_block());
_ = di_builder.insert_declare_record_at_end(argument_alloca, parameter_variable, di_builder.null_expression(), debug_location, module.current_basic_block());
}
}
}
@ -3439,18 +3485,21 @@ pub noinline fn convert(arena: *Arena, options: ConvertOptions) void {
const field_type = converter.parse_type(module);
const field_bit_offset = byte_offset * 8;
const field_byte_offset = byte_offset;
const field_bit_size = field_type.get_bit_size();
const field_byte_size = field_type.get_byte_size();
const field_byte_alignment = field_type.get_byte_alignment();
const field_bit_alignment = field_type.get_bit_alignment();
const field_bit_size = field_type.get_bit_size();
const field_byte_size = field_type.get_byte_size();
const field_byte_offset = lib.align_forward_u64(byte_offset, field_byte_alignment);
const field_bit_offset = field_byte_offset * 8;
field_buffer[field_count] = .{
.byte_offset = field_byte_offset,
.bit_offset = field_bit_offset,
.type = field_type,
.name = field_name,
};
llvm_field_type_buffer[field_count] = field_type.llvm.handle;
if (module.llvm.di_builder) |di_builder| {
@ -3460,7 +3509,7 @@ pub noinline fn convert(arena: *Arena, options: ConvertOptions) void {
byte_alignment = @max(byte_alignment, field_byte_alignment);
bit_alignment = @max(bit_alignment, field_bit_alignment);
byte_offset += field_byte_size;
byte_offset = field_byte_offset + field_byte_size;
field_count += 1;
@ -3608,10 +3657,11 @@ pub noinline fn convert(arena: *Arena, options: ConvertOptions) void {
.initial_value = value.llvm.to_constant(),
.type = expected_type.llvm.handle,
});
global_variable.to_value().set_alignment(@intCast(expected_type.get_byte_alignment()));
if (module.llvm.di_builder) |di_builder| {
const linkage_name = global_name;
const local_to_unit = is_export; // TODO: extern
const local_to_unit = !(is_export or is_extern);
const alignment = 0; // TODO
const global_variable_expression = di_builder.create_global_variable(module.llvm.global_scope, global_name, linkage_name, module.llvm.file, global_line, expected_type.llvm.debug, local_to_unit, di_builder.null_expression(), alignment);
global_variable.add_debug_info(global_variable_expression);
@ -3639,21 +3689,21 @@ pub noinline fn convert(arena: *Arena, options: ConvertOptions) void {
di_builder.finalize();
}
if (lib.optimization_mode == .Debug) {
const verify_result = module.llvm.handle.verify();
if (!verify_result.success) {
lib.print_string(module.llvm.handle.to_string());
lib.print_string("============================\n");
lib.print_string(verify_result.error_message orelse unreachable);
os.abort();
}
if (!lib.is_test) {
const module_string = module.llvm.handle.to_string();
lib.print_string_stderr(module_string);
}
// if (lib.optimization_mode == .Debug) {
const verify_result = module.llvm.handle.verify();
if (!verify_result.success) {
lib.print_string(module.llvm.handle.to_string());
lib.print_string("============================\n");
lib.print_string(verify_result.error_message orelse unreachable);
os.abort();
}
// if (!lib.is_test) {
// const module_string = module.llvm.handle.to_string();
// lib.print_string_stderr(module_string);
// }
// }
var error_message: llvm.String = undefined;
const target_machine = llvm.Target.Machine.create(.{
.target_options = llvm.Target.Options.default(),

20
src/converter_test.zig
View File

@ -222,3 +222,23 @@ test "struct_u64_u64" {
test "ret_c_bool" {
try invsrc(@src());
}
test "c_split_struct_ints" {
try invsrc(@src());
}
test "c_ret_struct_array" {
try invsrc(@src());
}
test "function_pointer" {
try invsrc(@src());
}
test "c_struct_with_array" {
try invsrc(@src());
}
test "c_abi" {
try invsrc(@src());
}

1
src/llvm_api.zig
View File

@ -8,6 +8,7 @@ pub extern fn LLVMContextCreate() *llvm.Context;
pub extern fn LLVMCreateBuilderInContext(context: *llvm.Context) *llvm.Builder;
pub extern fn LLVMIsACallInst(value: *llvm.Value) ?*llvm.Instruction.Call;
pub extern fn LLVMSetAlignment(value: *llvm.Value, alignment: c_uint) void;
// Module
pub extern fn llvm_module_create_global_variable(module: *llvm.Module, global_type: *llvm.Type, is_constant: bool, linkage: llvm.LinkageType, initial_value: *llvm.Constant, name: llvm.String, before: ?*llvm.GlobalVariable, thread_local_mode: llvm.ThreadLocalMode, address_space: c_uint, externally_initialized: bool) *llvm.GlobalVariable;

4
src/main.zig
View File

@ -168,7 +168,7 @@ pub fn main(argc: c_int, argv: [*:null]const ?[*:0]const u8) callconv(.C) c_int
const build_dir = "bb-cache";
os.make_directory(build_dir);
const output_path_base = arena.join_string(&.{ build_dir, "/", base_name });
const output_path_base = arena.join_string(&.{ build_dir, "/", base_name, "_", @tagName(lib.optimization_mode) });
const output_object_path = arena.join_string(&.{ output_path_base, ".o" });
const output_executable_path = output_path_base;
@ -179,7 +179,7 @@ pub fn main(argc: c_int, argv: [*:null]const ?[*:0]const u8) callconv(.C) c_int
.executable = output_executable_path,
.objects = if (lib.string.equal(base_name, "c_abi")) &.{ output_object_path, c_abi_object_path } else &.{output_object_path},
.name = base_name,
.build_mode = .debug_none,
.build_mode = .soft_optimize,
.content = file_content,
.path = file_path,
.has_debug_info = true,

2
tests/c_abi.bbb
View File

@ -274,7 +274,7 @@ require = fn (ok: u1) void
require(c_ret_s32() == -1);
require(c_ret_s64() == -1);
c_struct_with_array({ .a = 1, .padding = undefined, .b = 2, });
c_struct_with_array({ .a = 1, .padding = [0, 0, 0, 0], .b = 2, });
>x = c_ret_struct_with_array();
require(x.a == 4);

27
tests/c_ret_struct_array.bbb Normal file
View File

@ -0,0 +1,27 @@
StructWithArray = struct
{
a: u32,
padding: [4]u8,
c: u64,
};
c_ret_struct_with_array = fn [cc(c)] () StructWithArray
{
return { .a = 4, .padding = [ 0, 0, 0, 0 ], .c = 155 };
}
require = fn(ok: u1) void
{
if (!ok)
{
#trap();
}
}
[export] main = fn [cc(c)] () s32
{
>s = c_ret_struct_with_array();
require(s.a == 4);
require(s.c == 155);
return 0;
}

25
tests/c_split_struct_ints.bbb Normal file
View File

@ -0,0 +1,25 @@
SplitStructInt = struct
{
a: u64,
b: u8,
c: u32,
}
bb_split_struct_ints = fn [cc(c)] (x: SplitStructInt) void
{
}
[export] main = fn [cc(c)] () s32
{
>split: SplitStructInt = {
.a = 1234,
.b = 100,
.c = 1337,
};
bb_split_struct_ints(split);
>a: s32 = #truncate(split.a);
>b: s32 = #extend(split.b);
>c: s32 = split.c;
return a + b + 3 - c;
}

26
tests/c_struct_with_array.bbb Normal file
View File

@ -0,0 +1,26 @@
require = fn(ok: u1) void
{
if (!ok)
{
#trap();
}
}
StructWithArray = struct
{
a: u32,
padding: [4]u8,
b: u64,
}
c_struct_with_array = fn [cc(c)] (x: StructWithArray) void
{
require(x.a == 1);
require(x.b == 2);
}
[export] main = fn [cc(c)] () s32
{
c_struct_with_array({ .a = 1, .padding = [0, 0, 0, 0], .b = 2 });
return 0;
}

10
tests/function_pointer.bbb Normal file
View File

@ -0,0 +1,10 @@
foo = fn [cc(c)] () s32
{
return 123;
}
[export] main = fn [cc(c)] () s32
{
>fn_ptr = &foo;
return fn_ptr() - 123;
}