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Sema: implement functions generic across callconv() or align()

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This commit is contained in:
Andrew Kelley
2022-05-30 14:16:28 -07:00
parent 7e98b047dd
commit bd89a73d52
3 changed files with 125 additions and 40 deletions
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43
test/behavior/align.zig
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@@ -334,25 +334,44 @@ fn simple4() align(4) i32 {
return 0x19;
}
test "generic function with align param" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_llvm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
test "function align expression depends on generic parameter" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
// function alignment is a compile error on wasm32/wasm64
if (native_arch == .wasm32 or native_arch == .wasm64) return error.SkipZigTest;
if (native_arch == .thumb) return error.SkipZigTest;
try expect(whyWouldYouEverDoThis(1) == 0x1);
try expect(whyWouldYouEverDoThis(4) == 0x1);
try expect(whyWouldYouEverDoThis(8) == 0x1);
const S = struct {
fn doTheTest() !void {
try expect(foobar(1) == 2);
try expect(foobar(4) == 5);
try expect(foobar(8) == 9);
}
fn foobar(comptime align_bytes: u8) align(align_bytes) u8 {
return align_bytes + 1;
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
fn whyWouldYouEverDoThis(comptime align_bytes: u8) align(align_bytes) u8 {
_ = align_bytes;
return 0x1;
test "function callconv expression depends on generic parameter" {
if (builtin.zig_backend == .stage1) return error.SkipZigTest;
const S = struct {
fn doTheTest() !void {
try expect(foobar(.C, 1) == 2);
try expect(foobar(.Unspecified, 2) == 3);
}
fn foobar(comptime cc: std.builtin.CallingConvention, arg: u8) callconv(cc) u8 {
return arg + 1;
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "runtime known array index has best alignment possible" {