Commit d312665803c1535da6f36387183bbb2348e4216c | zig

author	Jacob Young <jacobly@ziglang.org> 2023-12-23 02:08:58-05:00
committer	Jacob Young <jacobly@ziglang.org> 2023-12-23 02:08:58-05:00
log	d312665803c1535da6f36387183bbb2348e4216c
tree	8b818933ed8041d44e2c6dedd634785401478d62
parent	21ae64852a531c36ae3166aa2b6f1fbaaf76c6f9

Closes #18345

2 files changed, 28 insertions(+), 5 deletions(-)

src/Sema.zig+7-5

...	...	@@ -24311,7 +24311,8 @@ fn analyzeMinMax(
24311	24311
24312	24312	fn upgradeToArrayPtr(sema: Sema, block: Block, ptr: Air.Inst.Ref, len: u64) !Air.Inst.Ref {
24313	24313	const mod = sema.mod;
24314		const info = sema.typeOf(ptr).ptrInfo(mod);
	24314	const ptr_ty = sema.typeOf(ptr);
	24315	const info = ptr_ty.ptrInfo(mod);
24315	24316	if (info.flags.size == .One) {
24316	24317	// Already an array pointer.
24317	24318	return ptr;
...	...	@@ -24330,10 +24331,11 @@ fn upgradeToArrayPtr(sema: Sema, block: Block, ptr: Air.Inst.Ref, len: u64) !A
24330	24331	.address_space = info.flags.address_space,
24331	24332	},
24332	24333	});
24333		if (info.flags.size == .Slice) {
24334		return block.addTyOp(.slice_ptr, new_ty, ptr);
24335		}
24336		return block.addBitCast(new_ty, ptr);
	24334	const non_slice_ptr = if (info.flags.size == .Slice)
	24335	try block.addTyOp(.slice_ptr, ptr_ty.slicePtrFieldType(mod), ptr)
	24336	else
	24337	ptr;
	24338	return block.addBitCast(new_ty, non_slice_ptr);
24337	24339	}
24338	24340
24339	24341	fn zirMemcpy(sema: Sema, block: Block, inst: Zir.Inst.Index) CompileError!void {

test/behavior/memcpy.zig+21

...	...	@@ -66,6 +66,27 @@ fn testMemcpyDestManyPtr() !void {
66	66	try expect(buf[4] == 'o');
67	67	}
68	68
	69	test "@memcpy slice" {
	70	if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
	71	if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
	72	if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
	73
	74	try testMemcpySlice();
	75	try comptime testMemcpySlice();
	76	}
	77
	78	fn testMemcpySlice() !void {
	79	var buf: [5]u8 = undefined;
	80	const dst: []u8 = &buf;
	81	const src: []const u8 = "hello";
	82	@memcpy(dst, src);
	83	try expect(buf[0] == 'h');
	84	try expect(buf[1] == 'e');
	85	try expect(buf[2] == 'l');
	86	try expect(buf[3] == 'l');
	87	try expect(buf[4] == 'o');
	88	}
	89
69	90	comptime {
70	91	const S = struct {
71	92	buffer: [8]u8 = undefined,