diff options
Diffstat (limited to 'src/Zcu/PerThread.zig')
| -rw-r--r-- | src/Zcu/PerThread.zig | 35 |
1 files changed, 7 insertions, 28 deletions
diff --git a/src/Zcu/PerThread.zig b/src/Zcu/PerThread.zig index 26f008e1c8..119b742a89 100644 --- a/src/Zcu/PerThread.zig +++ b/src/Zcu/PerThread.zig @@ -3737,30 +3737,6 @@ pub fn intBitsForValue(pt: Zcu.PerThread, val: Value, sign: bool) u16 { } } -/// https://github.com/ziglang/zig/issues/17178 explored storing these bit offsets -/// into the packed struct InternPool data rather than computing this on the -/// fly, however it was found to perform worse when measured on real world -/// projects. -pub fn structPackedFieldBitOffset( - pt: Zcu.PerThread, - struct_type: InternPool.LoadedStructType, - field_index: u32, -) u16 { - const zcu = pt.zcu; - const ip = &zcu.intern_pool; - assert(struct_type.layout == .@"packed"); - assert(struct_type.haveLayout(ip)); - var bit_sum: u64 = 0; - for (0..struct_type.field_types.len) |i| { - if (i == field_index) { - return @intCast(bit_sum); - } - const field_ty = Type.fromInterned(struct_type.field_types.get(ip)[i]); - bit_sum += field_ty.bitSize(zcu); - } - unreachable; // index out of bounds -} - pub fn navPtrType(pt: Zcu.PerThread, nav_id: InternPool.Nav.Index) Allocator.Error!Type { const zcu = pt.zcu; const ip = &zcu.intern_pool; @@ -4381,8 +4357,11 @@ fn runCodegenInner(pt: Zcu.PerThread, func_index: InternPool.Index, air: *Air) e try air.legalize(pt, features); } - var liveness: Air.Liveness = try .analyze(zcu, air.*, ip); - defer liveness.deinit(gpa); + var liveness: ?Air.Liveness = if (codegen.wantsLiveness(pt, nav)) + try .analyze(zcu, air.*, ip) + else + null; + defer if (liveness) |*l| l.deinit(gpa); if (build_options.enable_debug_extensions and comp.verbose_air) { const stderr = std.debug.lockStderrWriter(&.{}); @@ -4392,12 +4371,12 @@ fn runCodegenInner(pt: Zcu.PerThread, func_index: InternPool.Index, air: *Air) e stderr.print("# End Function AIR: {f}\n\n", .{fqn.fmt(ip)}) catch {}; } - if (std.debug.runtime_safety) { + if (std.debug.runtime_safety) verify_liveness: { var verify: Air.Liveness.Verify = .{ .gpa = gpa, .zcu = zcu, .air = air.*, - .liveness = liveness, + .liveness = liveness orelse break :verify_liveness, .intern_pool = ip, }; defer verify.deinit(); |