Workaround for Itanium A/B step errata

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

diff --git a/gcc/explow.c b/gcc/explow.c
index ff4f4c4..92de341 100644 (file)
--- a/gcc/explow.c
+++ b/gcc/explow.c
@@ -52,6 +52,10 @@ trunc_int_for_mode (c, mode)
 {
   int width = GET_MODE_BITSIZE (mode);
 
+  /* Canonicalize BImode to 0 and STORE_FLAG_VALUE.  */
+  if (mode == BImode)
+    return c & 1 ? STORE_FLAG_VALUE : 0;
+
   /* We clear out all bits that don't belong in MODE, unless they and our
      sign bit are all one.  So we get either a reasonable negative
      value or a reasonable unsigned value.  */
@@ -125,15 +129,10 @@ plus_constant_wide (x, c)
       if (GET_CODE (XEXP (x, 0)) == SYMBOL_REF
          && CONSTANT_POOL_ADDRESS_P (XEXP (x, 0)))
        {
-         /* Any rtl we create here must go in a saveable obstack, since
-            we might have been called from within combine.  */
-         push_obstacks_nochange ();
-         rtl_in_saveable_obstack ();
          tem
            = force_const_mem (GET_MODE (x),
                               plus_constant (get_pool_constant (XEXP (x, 0)),
                                              c));
-         pop_obstacks ();
          if (memory_address_p (GET_MODE (tem), XEXP (tem, 0)))
            return tem;
        }
@@ -842,8 +841,10 @@ force_not_mem (x)
      rtx x;
 {
   register rtx temp;
+
   if (GET_CODE (x) != MEM || GET_MODE (x) == BLKmode)
     return x;
+
   temp = gen_reg_rtx (GET_MODE (x));
   emit_move_insn (temp, x);
   return temp;