| author |  Jacob Young <jacobly@ziglang.org> 2025-05-31 23:39:35-04:00 |
| committer |  Matthew Lugg <mlugg@mlugg.co.uk> 2025-06-01 08:24:01+01:00 |
| log | 6daa37ded905431f3a25508a42590031b0905ab9 |
| tree | 0b8e5e0a0bf7aff870d07fffb09537d684d75295 |
| parent | 9edfccb9a7d23dbf02444023d042d5008a39462e |
| signature |  Commit is signed but in an unrecognized format. |
x86_64: fix packed struct equality
Closes #229902 files changed, 29 insertions(+), 2 deletions(-)
src- arch
- x86_64
- test
- behavior
src/arch/x86_64/CodeGen.zig+18-2
| ... | ... | @@ -77309,11 +77309,27 @@ fn genBody(cg: *CodeGen, body: []const Air.Inst.Index) InnerError!void { |
| 77309 | 77309 | }, |
| 77310 | 77310 | } |
| 77311 | 77311 | }, |
| 77312 | .int => res[0] = ops[0].cmpInts(cmp_op, &ops[1], cg) catch |err| break :err err, | |
| 77312 | .int => { | |
| 77313 | switch (ty.zigTypeTag(zcu)) { | |
| 77314 | else => {}, | |
| 77315 | .@"struct", .@"union" => { | |
| 77316 | assert(ty.containerLayout(zcu) == .@"packed"); | |
| 77317 | for (&ops) |*op| op.wrapInt(cg) catch |err| switch (err) { | |
| 77318 | error.SelectFailed => return cg.fail("failed to select {s} wrap {} {}", .{ | |
| 77319 | @tagName(air_tag), | |
| 77320 | ty.fmt(pt), | |
| 77321 | op.tracking(cg), | |
| 77322 | }), | |
| 77323 | else => |e| return e, | |
| 77324 | }; | |
| 77325 | }, | |
| 77326 | } | |
| 77327 | res[0] = ops[0].cmpInts(cmp_op, &ops[1], cg) catch |err| break :err err; | |
| 77328 | }, | |
| 77313 | 77329 | }) catch |err| switch (err) { |
| 77314 | 77330 | error.SelectFailed => return cg.fail("failed to select {s} {} {} {}", .{ |
| 77315 | 77331 | @tagName(air_tag), |
| 77316 | cg.typeOf(bin_op.lhs).fmt(pt), | |
| 77332 | ty.fmt(pt), | |
| 77317 | 77333 | ops[0].tracking(cg), |
| 77318 | 77334 | ops[1].tracking(cg), |
| 77319 | 77335 | }), |
test/behavior/packed-struct.zig+11
| ... | ... | @@ -1307,6 +1307,17 @@ test "packed struct equality" { |
| 1307 | 1307 | comptime try S.doTest(x, y); |
| 1308 | 1308 | } |
| 1309 | 1309 | |
| 1310 | test "packed struct equality ignores padding bits" { | |
| 1311 | if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; | |
| 1312 | if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest; | |
| 1313 | ||
| 1314 | const S = packed struct { b: bool }; | |
| 1315 | var s: S = undefined; | |
| 1316 | s.b = true; | |
| 1317 | try std.testing.expect(s != S{ .b = false }); | |
| 1318 | try std.testing.expect(s == S{ .b = true }); | |
| 1319 | } | |
| 1320 | ||
| 1310 | 1321 | test "packed struct with signed field" { |
| 1311 | 1322 | var s: packed struct { |
| 1312 | 1323 | a: i2, |