re PR sanitizer/82353 (runtime ubsan crash)

2017-10-16  Vladimir Makarov  <vmakarov@redhat.com>

	PR sanitizer/82353
	* lra.c (collect_non_operand_hard_regs): Don't ignore operator
	locations.
	* lra-lives.c (bb_killed_pseudos, bb_gen_pseudos): Move up.
	(make_hard_regno_born, make_hard_regno_dead): Update
	bb_killed_pseudos and bb_gen_pseudos for fixed regs.

From-SVN: r253796

gcc/ChangeLog

+2017-10-16  Vladimir Makarov  <vmakarov@redhat.com>
+
+	PR sanitizer/82353
+	* lra.c (collect_non_operand_hard_regs): Don't ignore operator
+	locations.
+	* lra-lives.c (bb_killed_pseudos, bb_gen_pseudos): Move up.
+	(make_hard_regno_born, make_hard_regno_dead): Update
+	bb_killed_pseudos and bb_gen_pseudos for fixed regs.
+
 2017-10-16  Jeff Law  <law@redhat.com>
 
 	* tree-ssa-dse.c (live_bytes_read): Fix thinko.

gcc/lra-lives.c

@@ -220,6 +220,9 @@ lra_intersected_live_ranges_p (lra_live_range_t r1, lra_live_range_t r2)
   return false;
 }
 
+/* The corresponding bitmaps of BB currently being processed.  */
+static bitmap bb_killed_pseudos, bb_gen_pseudos;
+
 /* The function processing birth of hard register REGNO.  It updates
    living hard regs, START_LIVING, and conflict hard regs for living
    pseudos.  Conflict hard regs for the pic pseudo is not updated if
@@ -243,6 +246,8 @@ make_hard_regno_born (int regno, bool check_pic_pseudo_p ATTRIBUTE_UNUSED)
 	|| i != REGNO (pic_offset_table_rtx))
 #endif
       SET_HARD_REG_BIT (lra_reg_info[i].conflict_hard_regs, regno);
+  if (fixed_regs[regno])
+    bitmap_set_bit (bb_gen_pseudos, regno);
 }
 
 /* Process the death of hard register REGNO.  This updates
@@ -255,6 +260,11 @@ make_hard_regno_dead (int regno)
     return;
   sparseset_set_bit (start_dying, regno);
   CLEAR_HARD_REG_BIT (hard_regs_live, regno);
+  if (fixed_regs[regno])
+    {
+      bitmap_clear_bit (bb_gen_pseudos, regno);
+      bitmap_set_bit (bb_killed_pseudos, regno);
+    }
 }
 
 /* Mark pseudo REGNO as living at program point POINT, update conflicting
@@ -299,9 +309,6 @@ mark_pseudo_dead (int regno, int point)
     }
 }
 
-/* The corresponding bitmaps of BB currently being processed.  */
-static bitmap bb_killed_pseudos, bb_gen_pseudos;
-
 /* Mark register REGNO (pseudo or hard register) in MODE as live at
    program point POINT.  Update BB_GEN_PSEUDOS.
    Return TRUE if the liveness tracking sets were modified, or FALSE

gcc/lra.c

@@ -820,7 +820,8 @@ collect_non_operand_hard_regs (rtx *x, lra_insn_recog_data_t data,
   const char *fmt = GET_RTX_FORMAT (code);
 
   for (i = 0; i < data->insn_static_data->n_operands; i++)
-    if (x == data->operand_loc[i])
+    if (! data->insn_static_data->operand[i].is_operator
+	&& x == data->operand_loc[i])
       /* It is an operand loc. Stop here.  */
       return list;
   for (i = 0; i < data->insn_static_data->n_dups; i++)