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llvm: implement Stdcall return types

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This commit is contained in:
Veikka Tuominen 2023-01-19 16:13:52 +02:00
parent 5949851074
commit 2b7678bc42
3 changed files with 21 additions and 9 deletions
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15
src/codegen/llvm.zig
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@ -10412,6 +10412,7 @@ fn firstParamSRet(fn_info: Type.Payload.Function.Data, target: std.Target) bool
.riscv32, .riscv64 => return riscv_c_abi.classifyType(fn_info.return_type, target) == .memory,
else => return false, // TODO investigate C ABI for other architectures
},
.Stdcall => return !isScalar(fn_info.return_type),
else => return false,
}
}
@ -10567,6 +10568,13 @@ fn lowerFnRetTy(dg: *DeclGen, fn_info: Type.Payload.Function.Data) !*llvm.Type {
else => return dg.lowerType(fn_info.return_type),
}
},
.Stdcall => {
if (isScalar(fn_info.return_type)) {
return dg.lowerType(fn_info.return_type);
} else {
return dg.context.voidType();
}
},
else => return dg.lowerType(fn_info.return_type),
}
}
@ -10802,12 +10810,7 @@ const ParamTypeIterator = struct {
it.zig_index += 1;
it.llvm_index += 1;
if (it.target.cpu.arch != .x86 or it.target.os.tag != .windows) {
return .byval;
}
const is_scalar = isScalar(ty);
if (is_scalar) {
if (isScalar(ty)) {
return .byval;
} else {
it.byval_attr = true;

3
test/c_abi/cfuncs.c
View File

@ -999,13 +999,14 @@ typedef struct {
short y;
} Coord2;
void __attribute__((stdcall)) stdcall_coord2(Coord2 a, Coord2 b, Coord2 c) {
Coord2 __attribute__((stdcall)) stdcall_coord2(Coord2 a, Coord2 b, Coord2 c) {
assert_or_panic(a.x == 0x1111);
assert_or_panic(a.y == 0x2222);
assert_or_panic(b.x == 0x3333);
assert_or_panic(b.y == 0x4444);
assert_or_panic(c.x == 0x5555);
assert_or_panic(c.y == 0x6666);
return (Coord2){123, 456};
}
void __attribute__((stdcall)) stdcall_big_union(union BigUnion x) {

12
test/c_abi/main.zig
View File

@ -1161,17 +1161,25 @@ const Coord2 = extern struct {
y: i16,
};
extern fn stdcall_coord2(Coord2, Coord2, Coord2) callconv(stdcall_callconv) void;
extern fn stdcall_coord2(Coord2, Coord2, Coord2) callconv(stdcall_callconv) Coord2;
test "Stdcall ABI structs" {
stdcall_coord2(
if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest;
if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest;
if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest;
const res = stdcall_coord2(
.{ .x = 0x1111, .y = 0x2222 },
.{ .x = 0x3333, .y = 0x4444 },
.{ .x = 0x5555, .y = 0x6666 },
);
try expect(res.x == 123);
try expect(res.y == 456);
}
extern fn stdcall_big_union(BigUnion) callconv(stdcall_callconv) void;
test "Stdcall ABI big union" {
if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest;
var x = BigUnion{
.a = BigStruct{
.a = 1,