From: Georg-Johann Lay <avr@gjlay.de>
Date: Wed, 7 Feb 2018 09:59:52 +0000 (+0000)
Subject: re PR target/84209 ([avr] Don't split SP in split2)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3924c9be0b45d920c140d56a7850b5a88b3eee5e;p=gcc.git

re PR target/84209 ([avr] Don't split SP in split2)

	PR target/84209
	* config/avr/avr.h (GENERAL_REGNO_P, GENERAL_REG_P): New macros.
	* config/avr/avr.md: Only post-reload split REG-REG moves if
	either register is REGERAL_REG_P.

From-SVN: r257440
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 088aa477574..7bcda10e22c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2018-02-07  Georg-Johann Lay  <avr@gjlay.de>
+
+	PR target/84209
+	* config/avr/avr.h (GENERAL_REGNO_P, GENERAL_REG_P): New macros.
+	* config/avr/avr.md: Only post-reload split REG-REG moves if
+	either register is REGERAL_REG_P.
+
 2018-02-07  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/84235
diff --git a/gcc/config/avr/avr.h b/gcc/config/avr/avr.h
index 76d18ae6716..cf8e0bfd972 100644
--- a/gcc/config/avr/avr.h
+++ b/gcc/config/avr/avr.h
@@ -153,6 +153,9 @@ FIXME: DRIVER_SELF_SPECS has changed.
 
 #define FIRST_PSEUDO_REGISTER 36
 
+#define GENERAL_REGNO_P(N)	IN_RANGE (N, 2, 31)
+#define GENERAL_REG_P(X)	(REG_P (X) && GENERAL_REGNO_P (REGNO (X)))
+
 #define FIXED_REGISTERS {\
   1,1,/* r0 r1 */\
   0,0,/* r2 r3 */\
diff --git a/gcc/config/avr/avr.md b/gcc/config/avr/avr.md
index 9fad0515e36..e619e695418 100644
--- a/gcc/config/avr/avr.md
+++ b/gcc/config/avr/avr.md
@@ -3368,6 +3368,8 @@
         (match_operand:HI 1 "reg_or_0_operand"))]
   "optimize
    && reload_completed
+   && GENERAL_REG_P (operands[0])
+   && (operands[1] == const0_rtx || GENERAL_REG_P (operands[1]))
    && (!AVR_HAVE_MOVW
        || const0_rtx == operands[1])"
   [(set (match_dup 2) (match_dup 3))