src/arch/x86_64/abi.zig |  18 +++++-
 src/codegen/llvm.zig    |  38 ++++++------
 test/c_abi/cfuncs.c     | 103 +++++++++++++++++++++++++++++++-
 test/c_abi/main.zig     |  80 +++++++++++++++++++++++++
 4 files changed, 215 insertions(+), 24 deletions(-)