From: Jeff Law <jeffreyalaw@gmail.com>
Date: Thu, 8 Jul 2021 21:09:36 +0000 (-0400)
Subject: Further improvements to H8 variable shift patterns
X-Git-Tag: basepoints/gcc-13~6140
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b14ac7b29c9a05c94f62fe065c219bbaa83653db;p=thirdparty%2Fgcc.git

Further improvements to H8 variable shift patterns

gcc/

	* config/h8300/shiftrotate.md (variable shifts): Expose condition
	code handling for the test before the loop.
---

diff --git a/gcc/config/h8300/shiftrotate.md b/gcc/config/h8300/shiftrotate.md
index 485303cb906d..d3aa6bea064d 100644
--- a/gcc/config/h8300/shiftrotate.md
+++ b/gcc/config/h8300/shiftrotate.md
@@ -377,8 +377,10 @@
    (clobber (reg:CC CC_REG))]
   "epilogue_completed
    && find_regno_note (insn, REG_DEAD, REGNO (operands[1]))"
-  [(set (pc)
-        (if_then_else (le (match_dup 1) (const_int 0))
+  [(set (reg:CCZN CC_REG)
+        (compare:CCZN (match_dup 1) (const_int 0)))
+   (set (pc)
+        (if_then_else (le (reg:CCZN CC_REG)  (const_int 0))
 		      (label_ref (match_dup 5))
 		      (pc)))
    (match_dup 4)
@@ -411,10 +413,12 @@
    (clobber (reg:CC CC_REG))]
   "epilogue_completed
    && !find_regno_note (insn, REG_DEAD, REGNO (operands[1]))"
-  [(set (match_dup 3)
-	(match_dup 1))
+  [(parallel
+     [(set (reg:CCZN CC_REG)
+	   (compare:CCZN (match_dup 1) (const_int 0)))
+      (set (match_dup 3) (match_dup 1))])
    (set (pc)
-        (if_then_else (le (match_dup 3) (const_int 0))
+        (if_then_else (le (reg:CCZN CC_REG) (const_int 0))
 		      (label_ref (match_dup 5))
 		      (pc)))
    (match_dup 4)