From 2500add25bd3258a66cc7ae199ab7eae53cc3202 Mon Sep 17 00:00:00 2001
From: "Maciej W. Rozycki" <macro@linux-mips.org>
Date: Sat, 5 Dec 2020 18:26:25 +0000
Subject: [PATCH] VAX: Use an int iterator to produce individual interlocked
 branches

With mode-specific interlocked branch insns already folded into iterated
templates now fold the two templates into one too, observing that the
only difference between them is the value of the bit branched on, which
is of course reflected both in the RTL expression and the instruction
produced.  Use an int iterator to iterate over the bit value, making use
of the newly-added wide integer support, and substituting patterns as
necessary to produce equivalent individual insns.  No functional change.

	gcc/
	* config/vax/builtins.md (bit): New int iterator.
	(ccss): New int attribute.
	(jbbssi<mode>, jbbcci<mode>): Fold insns into...
	(jbb<ccss>i<mode>): ... this.
---
 gcc/config/vax/builtins.md | 29 +++++++----------------------
 1 file changed, 7 insertions(+), 22 deletions(-)

diff --git a/gcc/config/vax/builtins.md b/gcc/config/vax/builtins.md
index 473b44f..8bbcd60 100644
--- a/gcc/config/vax/builtins.md
+++ b/gcc/config/vax/builtins.md
@@ -26,6 +26,9 @@
 
 (define_mode_attr bb_mem [(QI "m") (HI "Q") (SI "Q")])
 
+(define_int_iterator bit [0 1])
+(define_int_attr ccss [(0 "cc") (1 "ss")])
+
 (define_expand "ffssi2"
   [(set (match_operand:SI 0 "nonimmediate_operand" "")
 	(ffs:SI (match_operand:SI 1 "general_operand" "")))]
@@ -75,24 +78,6 @@
   DONE;
 }")
 
-(define_insn "jbbssi<mode>"
-  [(parallel
-    [(set (pc)
-	  (if_then_else
-	    (eq (zero_extract:SI
-		  (match_operand:VAXint 0 "memory_operand" "<bb_mem>")
-		  (const_int 1)
-		  (match_operand:SI 1 "general_operand" "nrmT"))
-		(const_int 1))
-	    (label_ref (match_operand 2 "" ""))
-	    (pc)))
-     (set (zero_extract:SI (match_operand:VAXint 3 "memory_operand" "+0")
-			   (const_int 1)
-			   (match_dup 1))
-	  (const_int 1))])]
-  ""
-  "jbssi %1,%0,%l2")
-
 (define_expand "sync_lock_release<mode>"
   [(set (match_operand:VAXint 0 "memory_operand" "+m")
 	(unspec:VAXint [(match_operand:VAXint 1 "const_int_operand" "n")
@@ -113,7 +98,7 @@
   DONE;
 }")
 
-(define_insn "jbbcci<mode>"
+(define_insn "jbb<ccss>i<mode>"
   [(parallel
     [(set (pc)
 	  (if_then_else
@@ -121,12 +106,12 @@
 		  (match_operand:VAXint 0 "memory_operand" "<bb_mem>")
 		  (const_int 1)
 		  (match_operand:SI 1 "general_operand" "nrmT"))
-		(const_int 0))
+		(const_int bit))
 	    (label_ref (match_operand 2 "" ""))
 	    (pc)))
      (set (zero_extract:SI (match_operand:VAXint 3 "memory_operand" "+0")
 			   (const_int 1)
 			   (match_dup 1))
-	  (const_int 0))])]
+	  (const_int bit))])]
   ""
-  "jbcci %1,%0,%l2")
+  "jb<ccss>i %1,%0,%l2")
-- 
2.7.4