re PR target/69274 (435.gromacs performance regression after r231814 on x86 Haswell and bdver2)

2016-02-08   Richard Biener  <rguenther@suse.de>

	PR rtl-optimization/69274
	* ira.c (ira_setup_alts): Do not change recog_data.operand
	order.

	* gcc.target/i386/addr-sel-1.c: XFAIL.

From-SVN: r233209

gcc/ChangeLog

+2016-02-08   Richard Biener  <rguenther@suse.de>
+
+	PR rtl-optimization/69274
+	* ira.c (ira_setup_alts): Do not change recog_data.operand
+	order.
+
 2016-02-08  Jeff Law  <law@redhat.com>
 
 	PR tree-optimization/65917

gcc/ira.c

@@ -1889,10 +1889,11 @@ ira_setup_alts (rtx_insn *insn, HARD_REG_SET &alts)
 	}
       if (commutative < 0)
 	break;
-      if (curr_swapped)
-	break;
+      /* Swap forth and back to avoid changing recog_data.  */
       std::swap (recog_data.operand[commutative],
 		 recog_data.operand[commutative + 1]);
+      if (curr_swapped)
+	break;
     }
 }
 

gcc/testsuite/ChangeLog

+2016-02-08   Richard Biener  <rguenther@suse.de>
+
+	PR rtl-optimization/69274
+	* gcc.target/i386/addr-sel-1.c: XFAIL.
+
 2016-02-08  Jeff Law  <law@redhat.com>
 
 	PR tree-optimization/68541

gcc/testsuite/gcc.target/i386/addr-sel-1.c

@@ -14,4 +14,4 @@ int f(int i)
 }
 
 /* { dg-final { scan-assembler "a\\+1" } } */
-/* { dg-final { scan-assembler "b\\+1" } } */
+/* { dg-final { scan-assembler "b\\+1" { xfail *-*-* } } } */