re PR debug/44178 (-fcompare-debug failure with -O1 -fgcse -fsched-pressure…

re PR debug/44178 (-fcompare-debug failure with -O1 -fgcse -fsched-pressure -funroll-loops -fschedule-insns)

	PR debug/44178
	* haifa-sched.c (initiate_bb_reg_pressure_info): Do not call
	setup_ref_regs for DEBUG_INSNs.

	* g++.dg/debug/pr44178.C: New test.

From-SVN: r159632

gcc/ChangeLog

+2010-05-20  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/44178
+	* haifa-sched.c (initiate_bb_reg_pressure_info): Do not call
+	setup_ref_regs for DEBUG_INSNs.
+
 2010-05-20  Jan Hubicka  <jh@suse.cz>
 
 	PR middle-end/44197

gcc/haifa-sched.c

@@ -718,7 +718,7 @@ initiate_bb_reg_pressure_info (basic_block bb)
 
   if (current_nr_blocks > 1)
     FOR_BB_INSNS (bb, insn)
-      if (INSN_P (insn))
+      if (NONDEBUG_INSN_P (insn))
 	setup_ref_regs (PATTERN (insn));
   initiate_reg_pressure_info (df_get_live_in (bb));
 #ifdef EH_RETURN_DATA_REGNO

gcc/testsuite/ChangeLog

+2010-05-20  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/44178
+	* g++.dg/debug/pr44178.C: New test.
+
 2010-05-20  Changpeng Fang  <changpeng.fang@amd.com>
 
 	PR middle-end/44185

gcc/testsuite/g++.dg/debug/pr44178.C

+// PR debug/44178
+// { dg-do compile }
+// { dg-options "-funroll-loops -fcompare-debug" { target i?86-*-* x86_64-*-* } }
+// { dg-options "-fsched-pressure -funroll-loops -fschedule-insns -fcompare-debug" { target i?86-*-* x86_64-*-* } }
+
+struct A
+{
+  A ();
+  A (const A &) {}
+  A &operator = (const A &);
+};
+
+struct B
+{
+  int u1;
+  A u2;
+  int u3;
+  int i;
+};
+
+B f1 (int *);
+B f2 (int, int, int, int);
+B f3 (B *, B *);
+
+B
+f4 (int x, int y, int z)
+{
+  B b1, b2;
+  for (int i = x; i > 0; i--)
+    for (int j = y; j > 0; j--)
+      {
+	int k;
+	f1 (&k);
+	b2 = f2 (i, 0, 0, z);
+	if (b2.i) return b2;
+	f3 (&b1, &b2);
+      }
+  return b1;
+}