authorgravatar for andrew@ziglang.orgAndrew Kelley <andrew@ziglang.org> 2025-08-28 18:29:48-07:00
committergravatar for andrew@ziglang.orgAndrew Kelley <andrew@ziglang.org> 2025-08-28 18:30:57-07:00
log530cc2c1111699d9d02ad9ebef94efa6b99f5205
treecba09d5ab895b2bfe3dedfbb741db10580ce6dc3
parent46b60dc06945152eee8280b8ff5b1e629ed74553

std.Io.Reader: work around llvm backend bug

tracked by #25067 and I already have a fix cooking in another branch

1 files changed, 10 insertions(+), 2 deletions(-)

lib/std/Io/Reader.zig+10-2
......@@ -1163,7 +1163,11 @@ pub inline fn takeStruct(r: *Reader, comptime T: type, endian: std.builtin.Endia
11631163 .@"struct" => |info| switch (info.layout) {
11641164 .auto => @compileError("ill-defined memory layout"),
11651165 .@"extern" => {
1166 var res = (try r.takeStructPointer(T)).*;
1166 // This code works around https://github.com/ziglang/zig/issues/25067
1167 // by avoiding a call to `peekStructPointer`.
1168 const struct_bytes = try r.takeArray(@sizeOf(T));
1169 var res: T = undefined;
1170 @memcpy(@as([]u8, @ptrCast(&res)), struct_bytes);
11671171 if (native_endian != endian) std.mem.byteSwapAllFields(T, &res);
11681172 return res;
11691173 },
......@@ -1188,7 +1192,11 @@ pub inline fn peekStruct(r: *Reader, comptime T: type, endian: std.builtin.Endia
11881192 .@"struct" => |info| switch (info.layout) {
11891193 .auto => @compileError("ill-defined memory layout"),
11901194 .@"extern" => {
1191 var res = (try r.peekStructPointer(T)).*;
1195 // This code works around https://github.com/ziglang/zig/issues/25067
1196 // by avoiding a call to `peekStructPointer`.
1197 const struct_bytes = try r.peekArray(@sizeOf(T));
1198 var res: T = undefined;
1199 @memcpy(@as([]u8, @ptrCast(&res)), struct_bytes);
11921200 if (native_endian != endian) std.mem.byteSwapAllFields(T, &res);
11931201 return res;
11941202 },