src/arch/x86_64/CodeGen.zig | 142 +++++++++++++++++++++-----------
 src/arch/x86_64/Emit.zig    |   6 ++
 src/codegen.zig             |  70 +++++++++++++++-
 test/behavior/union.zig     |  75 +++++++++++------
 4 files changed, 217 insertions(+), 76 deletions(-)