PR c/43893

[pf3gnuchains/gcc-fork.git] / gcc / ddg.c

diff --git a/gcc/ddg.c b/gcc/ddg.c
index 23fa6fa..f51c5dc 100644 (file)
--- a/gcc/ddg.c
+++ b/gcc/ddg.c
@@ -359,9 +359,13 @@ add_inter_loop_mem_dep (ddg_ptr g, ddg_node_ptr from, ddg_node_ptr to)
   if (mem_write_insn_p (from->insn))
     {
       if (mem_read_insn_p (to->insn))
-       create_ddg_dep_no_link (g, from, to, TRUE_DEP, MEM_DEP, 1);
+       create_ddg_dep_no_link (g, from, to,
+                               DEBUG_INSN_P (to->insn)
+                               ? ANTI_DEP : TRUE_DEP, MEM_DEP, 1);
       else if (from->cuid != to->cuid)
-       create_ddg_dep_no_link (g, from, to, OUTPUT_DEP, MEM_DEP, 1);
+       create_ddg_dep_no_link (g, from, to,
+                               DEBUG_INSN_P (to->insn)
+                               ? ANTI_DEP : OUTPUT_DEP, MEM_DEP, 1);
     }
   else
     {
@@ -369,8 +373,11 @@ add_inter_loop_mem_dep (ddg_ptr g, ddg_node_ptr from, ddg_node_ptr to)
        return;
       else if (from->cuid != to->cuid)
        {
-         create_ddg_dep_no_link (g, from, to, ANTI_DEP, MEM_DEP, 1);
-         create_ddg_dep_no_link (g, to, from, TRUE_DEP, MEM_DEP, 1);
+         create_ddg_dep_no_link (g, from, to, ANTI_DEP, MEM_DEP, 1);
+         if (DEBUG_INSN_P (from->insn) || DEBUG_INSN_P (to->insn))
+           create_ddg_dep_no_link (g, to, from, ANTI_DEP, MEM_DEP, 1);
+         else
+           create_ddg_dep_no_link (g, to, from, TRUE_DEP, MEM_DEP, 1);
        }
     }