Commit 7a51e0befe12c9d17e39f736027a205b1f19bdc6 | zig

Closes #11769

3 files changed, 29 insertions(+), 3 deletions(-)

src/Sema.zig+6-3

...	...	@@ -23426,8 +23426,11 @@ const InMemoryCoercionResult = union(enum) {
23426	23426	var index: u6 = 0;
23427	23427	var actual_noalias = false;
23428	23428	while (true) : (index += 1) {
23429		if (param.actual << index != param.wanted << index) {
23430		actual_noalias = (param.actual << index) == (1 << 31);
	23429	const actual = @truncate(u1, param.actual >> index);
	23430	const wanted = @truncate(u1, param.wanted >> index);
	23431	if (actual != wanted) {
	23432	actual_noalias = actual == 1;
	23433	break;
23431	23434	}
23432	23435	}
23433	23436	if (!actual_noalias) {
...	...	@@ -23921,7 +23924,7 @@ fn coerceInMemoryAllowedFns(
23921	23924
23922	23925	if (dest_info.noalias_bits != src_info.noalias_bits) {
23923	23926	return InMemoryCoercionResult{ .fn_param_noalias = .{
23924		.actual = dest_info.noalias_bits,
	23927	.actual = src_info.noalias_bits,
23925	23928	.wanted = dest_info.noalias_bits,
23926	23929	} };
23927	23930	}

src/type.zig+3

...	...	@@ -2042,6 +2042,9 @@ pub const Type = extern union {
2042	2042	try writer.writeAll("fn(");
2043	2043	for (fn_info.param_types) \|param_ty, i\| {
2044	2044	if (i != 0) try writer.writeAll(", ");
	2045	if (std.math.cast(u5, i)) \|index\| if (@truncate(u1, fn_info.noalias_bits >> index) != 0) {
	2046	try writer.writeAll("noalias ");
	2047	};
2045	2048	if (param_ty.tag() == .generic_poison) {
2046	2049	try writer.writeAll("anytype");
2047	2050	} else {

test/cases/compile_errors/noalias_param_coersion.zig created+20

...	...	@@ -0,0 +1,20 @@
	1	pub export fn entry() void {
	2	comptime var x: fn (noalias i32, noalias i32) void = undefined;
	3	x = bar;
	4	}
	5	pub export fn entry1() void {
	6	comptime var x: fn (i32, i32) void = undefined;
	7	x = foo;
	8	}
	9
	10	fn foo(noalias _: i32, noalias _: i32) void {}
	11	fn bar(noalias _: i32, _: i32) void {}
	12
	13	// error
	14	// backend=stage2
	15	// target=native
	16	//
	17	// :3:9: error: expected type 'fn(noalias i32, noalias i32) void', found 'fn(noalias i32, i32) void'
	18	// :3:9: note: regular parameter 1 cannot cast into a noalias parameter
	19	// :7:9: error: expected type 'fn(i32, i32) void', found 'fn(noalias i32, noalias i32) void'
	20	// :7:9: note: noalias parameter 0 cannot cast into a regular parameter