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Sema: convert slice sentinel to single pointer correctly

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David Rubin 2025-03-12 22:48:25 +00:00 committed by Matthew Lugg
parent f296eec294
commit acfdad8581
2 changed files with 33 additions and 0 deletions
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2
src/Sema.zig
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@ -25726,12 +25726,14 @@ fn zirMemcpy(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!void
var info = dest_ty.ptrInfo(zcu);
info.flags.size = .one;
info.child = array_ty.toIntern();
info.sentinel = .none;
break :info info;
});
const src_array_ptr_ty = try pt.ptrType(info: {
var info = src_ty.ptrInfo(zcu);
info.flags.size = .one;
info.child = array_ty.toIntern();
info.sentinel = .none;
break :info info;
});

31
test/behavior/memcpy.zig
View File

@ -133,3 +133,34 @@ test "@memcpy zero-bit type with aliasing" {
S.doTheTest();
comptime S.doTheTest();
}
test "@memcpy with sentinel" {
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
const S = struct {
fn doTheTest() void {
const field = @typeInfo(struct { a: u32 }).@"struct".fields[0];
var buffer: [field.name.len]u8 = undefined;
@memcpy(&buffer, field.name);
}
};
S.doTheTest();
comptime S.doTheTest();
}
test "@memcpy no sentinel source into sentinel destination" {
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
const S = struct {
fn doTheTest() void {
const src: []const u8 = &.{ 1, 2, 3 };
comptime var dest_buf: [3:0]u8 = @splat(0);
const dest: [:0]u8 = &dest_buf;
@memcpy(dest, src);
}
};
S.doTheTest();
comptime S.doTheTest();
}