re PR rtl-optimization/63384 (scheduler loops on endless fence list with…

re PR rtl-optimization/63384 (scheduler loops on endless fence list with -fselective-scheduling2 on x86)

gcc/

	PR rtl-optimization/63384
	* sel-sched.c (invoke_aftermath_hooks): Do not decrease issue_more
	on DEBUG_INSN_P insns.

testsuite/

	PR rtl-optimization/63384
	* g++.dg/pr63384.C: New test.

From-SVN: r234217

gcc/ChangeLog

 2016-03-15  Andrey Belevantsev  <abel@ispras.ru>
 
+	PR rtl-optimization/63384
+	* sel-sched.c (invoke_aftermath_hooks): Do not decrease issue_more on
+	DEBUG_INSN_P insns. 
+
+2016-03-15  Andrey Belevantsev  <abel@ispras.ru>
+
 	PR target/64411
 	* sched-deps.c (get_implicit_reg_pending_clobbers): New function,
 	factored out from ...

gcc/sel-sched.c

@@ -4262,8 +4262,9 @@ invoke_aftermath_hooks (fence_t fence, rtx_insn *best_insn, int issue_more)
                                       issue_more);
       memcpy (FENCE_STATE (fence), curr_state, dfa_state_size);
     }
-  else if (GET_CODE (PATTERN (best_insn)) != USE
-           && GET_CODE (PATTERN (best_insn)) != CLOBBER)
+  else if (!DEBUG_INSN_P (best_insn)
+	   && GET_CODE (PATTERN (best_insn)) != USE
+	   && GET_CODE (PATTERN (best_insn)) != CLOBBER)
     issue_more--;
 
   return issue_more;

gcc/testsuite/ChangeLog

 2016-03-15  Andrey Belevantsev  <abel@ispras.ru>
 
+	PR rtl-optimization/63384
+	* g++.dg/pr63384.C: New test. 
+
+2016-03-15  Andrey Belevantsev  <abel@ispras.ru>
+
 	PR target/64411
 	* gcc.target/i386/pr64411.C: New test.
 

gcc/testsuite/g++.dg/pr63384.C

+/* { dg-do compile { target powerpc*-*-* ia64-*-* i?86-*-* x86_64-*-* } } */
+/* { dg-options "-O2 -fselective-scheduling2 -fsel-sched-pipelining  -fsel-sched-pipelining-outer-loops -fsel-sched-reschedule-pipelined -fvar-tracking-assignments-toggle -ftree-vectorize" } */
+
+template <class T> T **make_test_matrix() {
+ T **data = new T *;
+ for (int i = 0; i < 1000; i++)
+    ;
+}
+
+template <typename T> void test() { T **c = make_test_matrix<T>(); }
+
+main() { test<float>(); }