df_simulate_artificial_refs_at_top can be called to get a new value
of the sets at the top of the block (this is rarely used).
- It would be trivial to define a similar set of functions that work
- in the forwards direction. The only changes would be to process
- the uses before the defs and properly rename the functions. This
- has so far not been necessary.
+ It would be not be difficult to define a similar set of functions
+ that work in the forwards direction. In that case the functions
+ would ignore the use sets and look for the REG_DEAD and REG_UNUSED
+ notes.
----------------------------------------------------------------------------*/
/* Apply the artificial uses and defs at the end of BB in a backwards
@findex RTL_CONST_CALL_P
@cindex @code{call_insn} and @samp{/u}
@cindex @code{unchanging}, in @code{call_insn}
-@item RTLCONST_OR_PURE_CALL_P (@var{x})
+@item RTL_CONST_CALL_P (@var{x})
In a @code{call_insn} indicates that the insn represents a call to a
const function. Stored in the @code{unchanging} field and printed as
@samp{/u}.
@findex RTL_PURE_CALL_P
@cindex @code{call_insn} and @samp{/i}
@cindex @code{return_val}, in @code{call_insn}
-@item RTLCONST_OR_PURE_CALL_P (@var{x})
+@item RTL_PURE_CALL_P (@var{x})
In a @code{call_insn} indicates that the insn represents a call to a
pure function. Stored in the @code{return_val} field and printed as
@samp{/i}.