re PR target/58330 (powerpc64 atomic store split in two)

	PR target/58330
gcc/
	* config/rs6000/rs6000.md (bswapdi2_64bit): Disable for volatile mems.
gcc/testsuite/
	* gcc.target/powerpc/pr58330.c: New.

From-SVN: r202418

gcc/ChangeLog

 2013-09-10  Alan Modra  <amodra@gmail.com>
 
+	PR target/58330
+	* config/rs6000/rs6000.md (bswapdi2_64bit): Disable for volatile mems.
+
+2013-09-10  Alan Modra  <amodra@gmail.com>
+
 	* config/rs6000/predicates.md (add_cint_operand): New.
 	(reg_or_add_cint_operand, small_toc_ref): Use add_cint_operand.
 	* config/rs6000/rs6000.md (largetoc_high_plus): Restrict offset

gcc/config/rs6000/rs6000.md

@@ -2376,7 +2376,9 @@
    (clobber (match_scratch:DI 3 "=&r,&r,&r"))
    (clobber (match_scratch:DI 4 "=&r,X,&r"))]
   "TARGET_POWERPC64 && !TARGET_LDBRX
-   && (REG_P (operands[0]) || REG_P (operands[1]))"
+   && (REG_P (operands[0]) || REG_P (operands[1]))
+   && !(MEM_P (operands[0]) && MEM_VOLATILE_P (operands[0]))
+   && !(MEM_P (operands[1]) && MEM_VOLATILE_P (operands[1]))"
   "#"
   [(set_attr "length" "16,12,36")])
 

gcc/testsuite/ChangeLog

 2013-09-10  Alan Modra  <amodra@gmail.com>
 
+	* gcc.target/powerpc/pr58330.c: New.
+
+2013-09-10  Alan Modra  <amodra@gmail.com>
+
 	* gcc.target/powerpc/medium_offset.c: New.
 
 2013-09-09  Jakub Jelinek  <jakub@redhat.com>