diff options
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/tm.texi | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index ee621ae..34bea56 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -1700,6 +1700,17 @@ If a register has 0 in @code{CALL_USED_REGISTERS}, the compiler automatically saves it on function entry and restores it on function exit, if the register is used within the function. +@findex CALL_REALLY_USED_REGISTERS +@item CALL_REALLY_USED_REGISTERS +@cindex call-used register +@cindex call-clobbered register +@cindex call-saved register +Like @code{CALL_USED_REGISTERS} except this macro doesn't require +that the entire set of @code{FIXED_REGISTERS} be included. +(@code{CALL_USED_REGISTERS} must be a superset of @code{FIXED_REGISTERS}). +This macro is optional. If not specified, it defaults to the value +of @code{CALL_USED_REGISTERS}. + @findex HARD_REGNO_CALL_PART_CLOBBERED @item HARD_REGNO_CALL_PART_CLOBBERED (@var{regno}, @var{mode}) @cindex call-used register |