diff options
Diffstat (limited to 'src/Zcu.zig')
| -rw-r--r-- | src/Zcu.zig | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/src/Zcu.zig b/src/Zcu.zig index d337f0b943..df35777231 100644 --- a/src/Zcu.zig +++ b/src/Zcu.zig @@ -3891,6 +3891,29 @@ pub fn typeToPackedStruct(zcu: *const Zcu, ty: Type) ?InternPool.LoadedStructTyp return s; } +/// 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( + zcu: *Zcu, + struct_type: InternPool.LoadedStructType, + field_index: u32, +) u16 { + 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 typeToUnion(zcu: *const Zcu, ty: Type) ?InternPool.LoadedUnionType { if (ty.ip_index == .none) return null; const ip = &zcu.intern_pool; @@ -4436,11 +4459,7 @@ pub fn callconvSupported(zcu: *Zcu, cc: std.builtin.CallingConvention) union(enu else => false, }, .stage2_aarch64 => switch (cc) { - .aarch64_aapcs, - .aarch64_aapcs_darwin, - .aarch64_aapcs_win, - => |opts| opts.incoming_stack_alignment == null, - .naked => true, + .aarch64_aapcs, .aarch64_aapcs_darwin, .naked => true, else => false, }, .stage2_x86 => switch (cc) { |