* config/rx/rx.opt (-mjsr): Add.

* config/rx/predicates.md (rx_call_operand): Avoid overflowing
calls when -mjsr.
* config/rx/rx.c (rx_function_ok_for_sibcall): Likewise for
overflowing jumps.
* doc/invoke.texi (-mjsr): Document it.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@231439 138bc75d-0d04-0410-961f-82ee72b054a4

3 files changed, 12 insertions, 1 deletions

diff --git a/gcc/config/rx/predicates.md b/gcc/config/rx/predicates.md
index 967a3abbec6..26667cfda05 100644
--- a/gcc/config/rx/predicates.md
+++ b/gcc/config/rx/predicates.md
@@ -24,7 +24,9 @@
 ;; Only registers and symbol refs are allowed.
 
 (define_predicate "rx_call_operand"
-  (match_code "symbol_ref,reg")
+  (ior (match_code "reg")
+       (and (match_test "!TARGET_JSR")
+	    (match_code "symbol_ref")))
 )
 
 ;; For sibcall operations we can only use a symbolic address.
diff --git a/gcc/config/rx/rx.c b/gcc/config/rx/rx.c
index c2c95917907..781b6b1b2b1 100644
--- a/gcc/config/rx/rx.c
+++ b/gcc/config/rx/rx.c
@@ -2857,6 +2857,9 @@ rx_warn_func_return (tree decl)
 static bool
 rx_function_ok_for_sibcall (tree decl, tree exp ATTRIBUTE_UNUSED)
 {
+  if (TARGET_JSR)
+    return false;
+
   /* Do not allow indirect tailcalls.  The
      sibcall patterns do not support them.  */
   if (decl == NULL)
diff --git a/gcc/config/rx/rx.opt b/gcc/config/rx/rx.opt
index 11113e2e305..56e8adf3f5c 100644
--- a/gcc/config/rx/rx.opt
+++ b/gcc/config/rx/rx.opt
@@ -149,3 +149,9 @@ Enable the use of the LRA register allocator.
 mallow-string-insns
 Target Report Var(rx_allow_string_insns) Init(1)
 Enables or disables the use of the SMOVF, SMOVB, SMOVU, SUNTIL, SWHILE and RMPA instructions.  Enabled by default.
+
+;---------------------------------------------------
+
+mjsr
+Target Report Mask(JSR)
+Always use JSR, never BSR, for calls.