https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97607
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Target| |x86_64-linux
Last reconfirmed| |2020-10-28
Status|UNCONFIRMED |NEW
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is the TARGET_PROMOTE_PROTOTYPES target hook at play, directing the FEs to
emit the sign-extension and RTL expansion failing to elide it. Note the
x86 ABI does _not_ specify the incoming argument is sign-extended so it only
works for functions where all calls are generated by GCC.
IMHO TARGET_PROMOTE_PROTOTYPES should go away.
