* tree-ssa-ccp.c (insert_clobber_before_stack_restore): Recurse on copy

[pf3gnuchains/gcc-fork.git] / gcc / tree-ssa-dse.c

diff --git a/gcc/tree-ssa-dse.c b/gcc/tree-ssa-dse.c
index c80d9c9..285d08c 100644 (file)
--- a/gcc/tree-ssa-dse.c
+++ b/gcc/tree-ssa-dse.c
@@ -94,7 +94,7 @@ dse_possible_dead_store_p (gimple stmt, gimple *use_stmt)
   temp = stmt;
   do
     {
-      gimple use_stmt, defvar_def;
+      gimple use_stmt;
       imm_use_iterator ui;
       bool fail = false;
       tree defvar;
@@ -108,7 +108,6 @@ dse_possible_dead_store_p (gimple stmt, gimple *use_stmt)
        defvar = PHI_RESULT (temp);
       else
        defvar = gimple_vdef (temp);
-      defvar_def = temp;
       temp = NULL;
       FOR_EACH_IMM_USE_STMT (use_stmt, ui, defvar)
        {
@@ -140,14 +139,7 @@ dse_possible_dead_store_p (gimple stmt, gimple *use_stmt)
                  fail = true;
                  BREAK_FROM_IMM_USE_STMT (ui);
                }
-             /* Do not consider the PHI as use if it dominates the 
-                stmt defining the virtual operand we are processing,
-                we have processed it already in this case.  */
-             if (gimple_bb (defvar_def) != gimple_bb (use_stmt)
-                 && !dominated_by_p (CDI_DOMINATORS,
-                                     gimple_bb (defvar_def),
-                                     gimple_bb (use_stmt)))
-               temp = use_stmt;
+             temp = use_stmt;
            }
          /* If the statement is a use the store is not dead.  */
          else if (ref_maybe_used_by_stmt_p (use_stmt,