doc: target.def (flags_regnum): Also mention effect on delay slot fil…

…ling.

* target.def (flags_regnum): Also mention effect on delay slot filling.
* doc/tm.texi: Regenerate.

Previously only mentioned an effect on compare elimination.

gcc/ChangeLog

@@ -1,3 +1,8 @@
+2020-01-24  Hans-Peter Nilsson  <[email protected]>
+
+	* target.def (flags_regnum): Also mention effect on delay slot filling.
+	* doc/tm.texi: Regenerate.
+
 2020-01-23  Jeff Law  <[email protected]>
 
 	* config/h8300/h8300.c (h8300_option_override): Fix diagnostic text.

gcc/doc/tm.texi

@@ -6532,7 +6532,9 @@ returns @code{VOIDmode}.
 @end deftypefn
 
 @deftypevr {Target Hook} {unsigned int} TARGET_FLAGS_REGNUM
-If the target has a dedicated flags register, and it needs to use the post-reload comparison elimination pass, then this value should be set appropriately.
+If the target has a dedicated flags register, and it needs to use the
+post-reload comparison elimination pass, or the delay slot filler pass,
+then this value should be set appropriately.
 @end deftypevr
 
 @node Costs

gcc/target.def

@@ -3716,10 +3716,10 @@ of spill registers and print a fatal error message.",
    target is constrainted to use post-reload comparison elimination.  */
 DEFHOOKPOD
 (flags_regnum,
- "If the target has a dedicated flags register, and it needs to use the\
- post-reload comparison elimination pass, then this value should be set\
- appropriately.",
- unsigned int, INVALID_REGNUM)
+ "If the target has a dedicated flags register, and it needs to use the\n\
+post-reload comparison elimination pass, or the delay slot filler pass,\n\
+then this value should be set appropriately.",
+unsigned int, INVALID_REGNUM)
 
 /* Compute a (partial) cost for rtx X.  Return true if the complete
    cost has been computed, and false if subexpressions should be