[gcc r12-1410] [committed] More improvements to H8 logicals for test/compare elimination

[Jeff Law <law@gcc.gnu.org>]

https://gcc.gnu.org/g:8a7d54b1e10b8f4fba1358260ed2e7056ed23cbd

commit r12-1410-g8a7d54b1e10b8f4fba1358260ed2e7056ed23cbd
Author: Jeff Law <jeffreyalaw@gmail.com>
Date:   Sun Jun 13 11:09:38 2021 -0400

    [committed] More improvements to H8 logicals for test/compare elimination
    
    gcc/
            * config/h8300/logical.md (<code>qi3_1<cczn>): New pattern.
            (andqi3_1<cczn>): Removed.
            (<ors>qi3_1): Do not split for IOR/XOR a single bit.
            (H8/SX bit logicals): Split out from other patterns.
            * config/h8300/multiply.md (mulqihi3_const<cczn>): Renamed from
            mulqihi3_const_clobber_flags.
            (mulqihi3<cczn>, mulhisi3_const<cczn>, mulhisi3<cczn>): Similarly

Diff:
---
 gcc/config/h8300/logical.md  | 64 +++++++++++++++++++++++++++-----------------
 gcc/config/h8300/multiply.md |  8 +++---
 2 files changed, 43 insertions(+), 29 deletions(-)

diff --git a/gcc/config/h8300/logical.md b/gcc/config/h8300/logical.md
index fae3c7cd0c5..cb4c6384bdf 100644
--- a/gcc/config/h8300/logical.md
+++ b/gcc/config/h8300/logical.md
@@ -69,14 +69,6 @@
   ""
   [(set_attr "length" "8,2")])
 
-(define_insn "*andqi3_1<cczn>"
-  [(set (match_operand:QI 0 "register_operand" "=r")
-	(and:QI (match_operand:QI 1 "register_operand" "%0")
-		(match_operand:QI 2 "h8300_src_operand" "rn")))
-   (clobber (reg:CC CC_REG))]
-  ""
-  "and  %X2,%X0"
-  [(set_attr "length" "2")])
 
 (define_insn_and_split "*andor<mode>3"
   [(set (match_operand:QHSI 0 "register_operand" "=r")
@@ -179,27 +171,49 @@
 		(match_operand:QI 2 "h8300_src_operand" "Y2,rQi")))]
   "TARGET_H8300SX || register_operand (operands[0], QImode)
    || single_one_operand (operands[2], QImode)"
-  "#"
-  "&& reload_completed"
+  { return <CODE> == IOR ? "bset\\t%V2,%R0" : "bnot\\t%V2,%R0"; }
+  "&& reload_completed && !single_one_operand (operands[2], QImode)"
   [(parallel [(set (match_dup 0) (ors:QI (match_dup 1) (match_dup 2)))
-	      (clobber (reg:CC CC_REG))])])
+	      (clobber (reg:CC CC_REG))])]
+  ""
+  [(set_attr "length" "8")])
 
-(define_insn "<code>qi3_1_clobber_flags"
-  [(set (match_operand:QI 0 "bit_operand" "=U,rQ")
-	(ors:QI (match_operand:QI 1 "bit_operand" "%0,0")
-		(match_operand:QI 2 "h8300_src_operand" "Y2,rQi")))
+(define_insn "*<code>qi3_1<cczn>"
+  [(set (match_operand:QI 0 "bit_operand" "=rQ")
+	(ors:QI (match_operand:QI 1 "bit_operand" "%0")
+		(match_operand:QI 2 "h8300_src_operand" "rQi")))
    (clobber (reg:CC CC_REG))]
-  "TARGET_H8300SX || register_operand (operands[0], QImode)
-   || single_one_operand (operands[2], QImode)"
-  {
-    if (which_alternative == 0)
-      return <CODE> == IOR ? "bset\\t%V2,%R0" : "bnot\\t%V2,%R0";
-    else if (which_alternative == 1)
-      return <CODE> == IOR ? "or\\t%X2,%X0" : "xor\\t%X2,%X0";
-    gcc_unreachable ();
+  "TARGET_H8300SX"
+  { return <CODE> == IOR ? "or\\t%X2,%X0" : "xor\\t%X2,%X0"; }
+  [(set_attr "length" "*")
+   (set_attr "length_table" "logicb")])
+
+(define_insn "*<code>qi3_1<cczn>"
+  [(set (match_operand:QI 0 "register_operand" "=r")
+	(ors:QI (match_operand:QI 1 "register_operand" "%0")
+		(match_operand:QI 2 "h8300_src_operand" "ri")))
+   (clobber (reg:CC CC_REG))]
+  "TARGET_H8300SX"
+  { return <CODE> == IOR ? "or\\t%X2,%X0" : "xor\\t%X2,%X0"; }
+  [(set_attr "length" "*")
+   (set_attr "length_table" "logicb")])
+
+(define_insn "*<code>qi3_1<cczn>"
+  [(set (match_operand:QI 0 "register_operand" "=r")
+	(logicals:QI (match_operand:QI 1 "register_operand" "%0")
+		     (match_operand:QI 2 "h8300_src_operand" "rn")))
+   (clobber (reg:CC CC_REG))]
+  ""
+  { 
+    if (<CODE> == IOR)
+      return "or\\t%X2,%X0";
+    else if (<CODE> == XOR)
+      return "xor\\t%X2,%X0";
+    else if (<CODE> == AND)
+      return "and\\t%X2,%X0";
+   gcc_unreachable ();
   }
-  [(set_attr "length" "8,*")
-   (set_attr "length_table" "*,logicb")])
+  [(set_attr "length" "2")])
 
 ;; ----------------------------------------------------------------------
 ;; {AND,IOR,XOR}{HI3,SI3} PATTERNS
diff --git a/gcc/config/h8300/multiply.md b/gcc/config/h8300/multiply.md
index 1d56d4797a7..8b9328c1282 100644
--- a/gcc/config/h8300/multiply.md
+++ b/gcc/config/h8300/multiply.md
@@ -26,7 +26,7 @@
 		   (mult:HI (sign_extend:HI (match_dup 1)) (match_dup 2)))
 	      (clobber (reg:CC CC_REG))])])
 
-(define_insn "*mulqihi3_const_clobber_flags"
+(define_insn "*mulqihi3_const<cczn>"
   [(set (match_operand:HI 0 "register_operand" "=r")
 	(mult:HI (sign_extend:HI (match_operand:QI 1 "register_operand" "%0"))
 		 (match_operand:QI 2 "nibble_operand" "IP4>X")))
@@ -47,7 +47,7 @@
 			    (sign_extend:HI (match_dup 2))))
 	      (clobber (reg:CC CC_REG))])])
 
-(define_insn "*mulqihi3_clobber_flags"
+(define_insn "*mulqihi3<cczn>"
   [(set (match_operand:HI 0 "register_operand" "=r")
 	(mult:HI (sign_extend:HI (match_operand:QI 1 "register_operand" "%0"))
 		 (sign_extend:HI (match_operand:QI 2 "register_operand" "r"))))
@@ -78,7 +78,7 @@
 		   (mult:SI (sign_extend:SI (match_dup 1)) (match_dup 2)))
 	      (clobber (reg:CC CC_REG))])])
 
-(define_insn "*mulhisi3_const_clobber_flags"
+(define_insn "*mulhisi3_const<cczn>"
   [(set (match_operand:SI 0 "register_operand" "=r")
 	(mult:SI (sign_extend:SI (match_operand:HI 1 "register_operand" "%0"))
 		 (match_operand:SI 2 "nibble_operand" "IP4>X")))
@@ -99,7 +99,7 @@
 			    (sign_extend:SI (match_dup 2))))
 	      (clobber (reg:CC CC_REG))])])
 
-(define_insn "*mulhisi3_clobber_flags"
+(define_insn "*mulhisi3<cczn>"
   [(set (match_operand:SI 0 "register_operand" "=r")
 	(mult:SI (sign_extend:SI (match_operand:HI 1 "register_operand" "%0"))
 		 (sign_extend:SI (match_operand:HI 2 "register_operand" "r"))))