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x86_64 backend: support @memset with slices

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This commit is contained in:
Andrew Kelley
2023-04-23 22:15:45 -07:00
parent 881e931ee1
commit 58fabbc903
3 changed files with 50 additions and 27 deletions
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16
lib/std/array_list.zig
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@@ -121,13 +121,7 @@ pub fn ArrayListAligned(comptime T: type, comptime alignment: ?u29) type {
const new_memory = try allocator.alignedAlloc(T, alignment, self.items.len);
mem.copy(T, new_memory, self.items);
// TODO: write like this instead:
//@memset(self.items, undefined);
// first we need to implement memset with element ABI size > 1 in
// the x86_64 selfhosted backend.
@memset(@ptrCast([*]u8, self.items.ptr)[0..self.items.len * @sizeOf(T)], undefined);
@memset(self.items, undefined);
self.clearAndFree();
return new_memory;
}
@@ -603,13 +597,7 @@ pub fn ArrayListAlignedUnmanaged(comptime T: type, comptime alignment: ?u29) typ
const new_memory = try allocator.alignedAlloc(T, alignment, self.items.len);
mem.copy(T, new_memory, self.items);
// TODO: write like this instead:
//@memset(self.items, undefined);
// first we need to implement memset with element ABI size > 1 in
// the x86_64 selfhosted backend.
@memset(@ptrCast([*]u8, self.items.ptr)[0..self.items.len * @sizeOf(T)], undefined);
@memset(self.items, undefined);
self.clearAndFree(allocator);
return new_memory;
}