re PR rtl-optimization/57459 (LRA inheritance bug)

2013-06-06  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/57459
	* lra-constraints.c (update_ebb_live_info): Fix typo for operand
	type when setting live regs.

2013-06-06  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/57459
	* gcc.target/i386/pr57459.c: New test.

From-SVN: r199762

gcc/ChangeLog

 2013-06-06  Vladimir Makarov  <vmakarov@redhat.com>
 
+	PR rtl-optimization/57459
+	* lra-constraints.c (update_ebb_live_info): Fix typo for operand
+	type when setting live regs.
+
+2013-06-06  Vladimir Makarov  <vmakarov@redhat.com>
+
 	* config/s390/s390.opt (mlra): New option.
 	* config/s390/s390.c (s390_decompose_address): Check displacement
 	for all registers for LRA.

gcc/lra-constraints.c

@@ -4545,7 +4545,7 @@ update_ebb_live_info (rtx head, rtx tail)
 	  bitmap_clear_bit (&live_regs, reg->regno);
       /* Mark each used value as live.  */
       for (reg = curr_id->regs; reg != NULL; reg = reg->next)
-	if (reg->type == OP_IN
+	if (reg->type != OP_OUT
 	    && bitmap_bit_p (&check_only_regs, reg->regno))
 	  bitmap_set_bit (&live_regs, reg->regno);
       /* It is quite important to remove dead move insns because it

gcc/testsuite/ChangeLog

+2013-06-06  Vladimir Makarov  <vmakarov@redhat.com>
+
+	PR rtl-optimization/57459
+	* gcc.target/i386/pr57459.c: New test.
+
 2013-06-06  Teresa Johnson  <tejohnson@google.com>
 
 	PR c++/53743

gcc/testsuite/gcc.target/i386/pr57459.c

+/* PR rtl-optimization/57459 */
+/* { dg-do run } */
+/* { dg-options "-fno-inline -O2 -minline-all-stringops -fno-omit-frame-pointer" } */
+
+int total1[10], total2[10], total3[10], total4[10], total5[10], a[20];
+int len;
+
+void stackclean() {
+  void *ptr = __builtin_alloca(20000);
+  __builtin_memset(ptr, 0, 20000);
+}
+
+void foo(const char *s) {
+  int r1 = a[1];
+  int r2 = a[2];
+  int r3 = a[3];
+  int r4 = a[4];
+  int r5 = a[5];
+
+  len =  __builtin_strlen(s);
+
+  if (s != 0)
+    return;
+
+  while (r1) {
+   total1[r1] = r1;
+   r1--;
+  }
+
+  while (r2) {
+   total2[r2] = r2;
+   r2--;
+  }
+
+  while (r3) {
+   total3[r3] = r3;
+   r3--;
+  }
+
+  while (r4) {
+   total4[r4] = r4;
+   r4--;
+  }
+
+  while (r5) {
+   total5[r5] = r5;
+   r5--;
+  }
+}
+
+extern void abort (void);
+
+int main() {
+  stackclean();
+  foo("abcdefgh");
+  if (len != 8)
+    abort ();
+  return 0;
+}
+