re PR target/80970 (internal compiler error in find_reloads, at reload.c:4077)

PR target/80970
* config/m68k/m68k.md (bsetdreg, bchgdreg, bclrdreg): Use "=d"
instead of "+d".

From-SVN: r249401

gcc/ChangeLog

+2017-06-20  Andreas Schwab  <schwab@suse.de>
+
+	PR target/80970
+	* config/m68k/m68k.md (bsetdreg, bchgdreg, bclrdreg): Use "=d"
+	instead of "+d".
+
 2017-06-20  Prakhar Bahuguna  <prakhar.bahuguna@arm.com>
 
 	* config/arm/arm-c.c (arm_cpu_builtins): New block to define

gcc/config/m68k/m68k.md

@@ -5337,7 +5337,7 @@
   [(set_attr "type" "bitrw")])
 
 (define_insn "*bsetdreg"
-  [(set (match_operand:SI 0 "register_operand" "+d")
+  [(set (match_operand:SI 0 "register_operand" "=d")
 	(ior:SI (ashift:SI (const_int 1)
 			   (and:SI (match_operand:SI 1 "register_operand" "d")
 				   (const_int 31)))
@@ -5350,7 +5350,7 @@
   [(set_attr "type" "bitrw")])
 
 (define_insn "*bchgdreg"
-  [(set (match_operand:SI 0 "register_operand" "+d")
+  [(set (match_operand:SI 0 "register_operand" "=d")
 	(xor:SI (ashift:SI (const_int 1)
 			   (and:SI (match_operand:SI 1 "register_operand" "d")
 				   (const_int 31)))
@@ -5363,7 +5363,7 @@
   [(set_attr "type" "bitrw")])
 
 (define_insn "*bclrdreg"
-  [(set (match_operand:SI 0 "register_operand" "+d")
+  [(set (match_operand:SI 0 "register_operand" "=d")
 	(and:SI (rotate:SI (const_int -2)
 			   (and:SI (match_operand:SI 1 "register_operand" "d")
 				   (const_int 31)))

gcc/testsuite/gcc.dg/torture/pr80970.c

+/* { dg-do compile } */
+
+int a, b, c, d, e;
+void f ()
+{
+  long g, h;
+  if (c)
+    e = d;
+  g = d & 31;
+  h = 1 << g;
+  a = e | h;
+  b = a;
+}