Hi,
Just to show comment from: gcc/gcc/testsuite/gcc.target/x86_64/abi/defines.h
/* These defines control the building of the list of types to check. There
is a string identifying the type (with a comma after), a size of the
type
(also with a comma and an integer for adding to the total amount of
types)
and an alignment of the type (which is currently not really needed since
the abi specifies that alignof == sizeof for all scalar types). */
Specifically "the abi specifies that alignof == sizeof for all scalar types"
Vladimir Kokovic
Belgrade, 11.November 2017