re PR target/64411 (ICE: in verify_target_availability, at sel-sched.c:1577 with -Os -mcmodel=medium -fPIC -fschedule-insns -fselective-scheduling)

gcc/

        PR target/64411
        * sched-deps.c (get_implicit_reg_pending_clobbers): New function,
        factored out from ...
        (sched_analyze_insn): ... here.
        * sched-int.h (get_implicit_reg_pending_clobbers): Declare it.
        * sel-sched-ir.c (setup_id_implicit_regs): New function, use
        get_implicit_reg_pending_clobbers in it.
        (setup_id_reg_sets): Use setup_id_implicit_regs.
        (deps_init_id): Ditto.

testsuite/

	PR target/64411
	* gcc.target/i386/pr64411.C: New test.

From-SVN: r234216

gcc/ChangeLog

@@ -1,3 +1,15 @@
+2016-03-15  Andrey Belevantsev  <abel@ispras.ru>
+
+	PR target/64411
+	* sched-deps.c (get_implicit_reg_pending_clobbers): New function,
+	factored out from ...
+	(sched_analyze_insn): ... here.
+	* sched-int.h (get_implicit_reg_pending_clobbers): Declare it.
+	* sel-sched-ir.c (setup_id_implicit_regs): New function, use
+	get_implicit_reg_pending_clobbers in it.
+	(setup_id_reg_sets): Use setup_id_implicit_regs.
+	(deps_init_id): Ditto.
+
 2016-03-15  Tom de Vries  <tom@codesourcery.com>
 
 	PR ipa/70161

gcc/sched-deps.c

@@ -2860,6 +2860,17 @@ sched_macro_fuse_insns (rtx_insn *insn)
 
 }
 
+/* Get the implicit reg pending clobbers for INSN and save them in TEMP.  */
+void
+get_implicit_reg_pending_clobbers (HARD_REG_SET *temp, rtx_insn *insn)
+{
+  extract_insn (insn);
+  preprocess_constraints (insn);
+  alternative_mask preferred = get_preferred_alternatives (insn);
+  ira_implicitly_set_insn_hard_regs (temp, preferred);
+  AND_COMPL_HARD_REG_SET (*temp, ira_no_alloc_regs);
+}
+
 /* Analyze an INSN with pattern X to find all dependencies.  */
 static void
 sched_analyze_insn (struct deps_desc *deps, rtx x, rtx_insn *insn)
@@ -2872,12 +2883,7 @@ sched_analyze_insn (struct deps_desc *deps, rtx x, rtx_insn *insn)
   if (! reload_completed)
     {
       HARD_REG_SET temp;
-
+      get_implicit_reg_pending_clobbers (&temp, insn);
-      extract_insn (insn);
-      preprocess_constraints (insn);
-      alternative_mask prefrred = get_preferred_alternatives (insn);
-      ira_implicitly_set_insn_hard_regs (&temp, prefrred);
-      AND_COMPL_HARD_REG_SET (temp, ira_no_alloc_regs);
       IOR_HARD_REG_SET (implicit_reg_pending_clobbers, temp);
     }
 

gcc/sched-int.h

@@ -1351,6 +1351,7 @@ extern void finish_deps_global (void);
 extern void deps_analyze_insn (struct deps_desc *, rtx_insn *);
 extern void remove_from_deps (struct deps_desc *, rtx_insn *);
 extern void init_insn_reg_pressure_info (rtx_insn *);
+extern void get_implicit_reg_pending_clobbers (HARD_REG_SET *, rtx_insn *);
 
 extern dw_t get_dep_weak (ds_t, ds_t);
 extern ds_t set_dep_weak (ds_t, ds_t, dw_t);

gcc/sel-sched-ir.c

@@ -2650,6 +2650,23 @@ maybe_downgrade_id_to_use (idata_t id, insn_t insn)
     IDATA_TYPE (id) = USE;
 }
 
+/* Setup implicit register clobbers calculated by sched-deps for INSN
+   before reload and save them in ID.  */
+static void
+setup_id_implicit_regs (idata_t id, insn_t insn)
+{
+  if (reload_completed)
+    return;
+
+  HARD_REG_SET temp;
+  unsigned regno;
+  hard_reg_set_iterator hrsi;
+
+  get_implicit_reg_pending_clobbers (&temp, insn);
+  EXECUTE_IF_SET_IN_HARD_REG_SET (temp, 0, regno, hrsi)
+    SET_REGNO_REG_SET (IDATA_REG_SETS (id), regno);
+}
+
 /* Setup register sets describing INSN in ID.  */
 static void
 setup_id_reg_sets (idata_t id, insn_t insn)
@@ -2704,6 +2721,9 @@ setup_id_reg_sets (idata_t id, insn_t insn)
 	}
     }
 
+  /* Also get implicit reg clobbers from sched-deps.  */
+  setup_id_implicit_regs (id, insn);
+
   return_regset_to_pool (tmp);
 }
 
@@ -2735,20 +2755,18 @@ deps_init_id (idata_t id, insn_t insn, bool force_unique_p)
   deps_init_id_data.force_use_p = false;
 
   init_deps (dc, false);
-
   memcpy (&deps_init_id_sched_deps_info,
 	  &const_deps_init_id_sched_deps_info,
 	  sizeof (deps_init_id_sched_deps_info));
-
   if (spec_info != NULL)
     deps_init_id_sched_deps_info.generate_spec_deps = 1;
-
   sched_deps_info = &deps_init_id_sched_deps_info;
 
   deps_analyze_insn (dc, insn);
+  /* Implicit reg clobbers received from sched-deps separately.  */
+  setup_id_implicit_regs (id, insn);
 
   free_deps (dc);
-
   deps_init_id_data.id = NULL;
 }
 

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2016-03-15  Andrey Belevantsev  <abel@ispras.ru>
+
+	PR target/64411
+	* gcc.target/i386/pr64411.C: New test.
+
 2016-03-15  Tom de Vries  <tom@codesourcery.com>
 
 	* gfortran.dg/goacc/kernels-alias-2.f95: New test.

gcc/testsuite/gcc.target/i386/pr64411.C

@@ -0,0 +1,27 @@
+/* { dg-do compile } */
+/* { dg-options "-Os -mcmodel=medium -fPIC -fschedule-insns -fselective-scheduling" } */
+
+typedef __SIZE_TYPE__ size_t;
+
+extern "C"  long strtol ()
+  { return 0; }
+
+static struct {
+  void *sp[2];
+} info;
+
+union S813
+{
+  void * c[5];
+}
+s813;
+
+S813 a813[5];
+S813 check813 (S813, S813 *, S813);
+
+void checkx813 ()
+{
+  __builtin_memset (&s813, '\0', sizeof (s813));
+  __builtin_memset (&info, '\0', sizeof (info));
+  check813 (s813, &a813[1], a813[2]);
+}