[gcc-in-cxx] Various small C++ patches

[Ian Lance Taylor]

I committed this patch to the gcc-in-cxx branch to avoid warnings from
the C++ frontend.  The most interesting case here is not declaring
'shift' as const in varasm.c, as a workaround to avoid a warning about
shifting too far for the type.

Ian


2009-03-04  Ian Lance Taylor  <iant@xxxxxxxxxx>

        * rtl.h (SUBREG_PROMOTED_UNSIGNED_P): Add cast.
        * ipa-struct-reorg.c (create_general_new_stmt): Initialize rhs.
        * ira-build.c (copy_info_to_removed_store_destinations):
        Initialize parent_a.
        * varasm.c (const_rtx_hash_1): Don't declare 'shift' as const.
        * config/i386/i386.c (ix86_expand_builtin): Change fcode to enum
        type.


Index: ira-build.c
===================================================================
--- ira-build.c (revision 144568)
+++ ira-build.c (working copy)
@@ -2394,7 +2394,8 @@ static ira_allocno_t *regno_top_level_al
 static bool
 copy_info_to_removed_store_destinations (int regno)
 {
-  ira_allocno_t a, parent_a;
+  ira_allocno_t a;
+  ira_allocno_t parent_a = NULL;
   ira_loop_tree_node_t parent;
   allocno_live_range_t r;
   bool merged_p;
Index: varasm.c
===================================================================
--- varasm.c    (revision 144568)
+++ varasm.c    (working copy)
@@ -3436,7 +3436,7 @@ const_rtx_hash_1 (rtx *xp, void *data)
       hwi = INTVAL (x);
     fold_hwi:
       {
-       const int shift = sizeof (hashval_t) * CHAR_BIT;
+       int shift = sizeof (hashval_t) * CHAR_BIT;
        const int n = sizeof (HOST_WIDE_INT) / sizeof (hashval_t);
        int i;
 
Index: rtl.h
===================================================================
--- rtl.h       (revision 144568)
+++ rtl.h       (working copy)
@@ -1117,7 +1117,7 @@ do {                                                      
                \
 } while (0)
 #define SUBREG_PROMOTED_UNSIGNED_P(RTX)        \
   ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
-     ? -1 : (RTX)->unchanging)
+   ? -1 : (int) (RTX)->unchanging)
 
 /* Access various components of an ASM_OPERANDS rtx.  */
 
Index: ipa-struct-reorg.c
===================================================================
--- ipa-struct-reorg.c  (revision 144568)
+++ ipa-struct-reorg.c  (working copy)
@@ -1262,7 +1262,8 @@ create_general_new_stmt (struct access_s
       if (is_gimple_assign (new_stmt))
        {
          lhs = gimple_assign_lhs (new_stmt);
-         
+         rhs = NULL_TREE;
+
          if (TREE_CODE (lhs) == SSA_NAME)
            lhs = SSA_NAME_VAR (lhs);
          if (gimple_assign_rhs_code (new_stmt) == SSA_NAME)
Index: config/i386/i386.c
===================================================================
--- config/i386/i386.c  (revision 144568)
+++ config/i386/i386.c  (working copy)
@@ -24560,7 +24560,7 @@ ix86_expand_builtin (tree exp, rtx targe
   tree arg0, arg1, arg2;
   rtx op0, op1, op2, pat;
   enum machine_mode mode0, mode1, mode2;
-  unsigned int fcode = DECL_FUNCTION_CODE (fndecl);
+  enum ix86_builtins fcode = (enum ix86_builtins) DECL_FUNCTION_CODE (fndecl);
 
   /* Determine whether the builtin function is available under the current ISA.
      Originally the builtin was not created if it wasn't applicable to the