2002-04-09 Richard Henderson <rth@redhat.com>
+ PR c/5078
+ * expr.c (expand_expr) [INTEGER_CST]: Force overflows into registers.
+
+2002-04-09 Richard Henderson <rth@redhat.com>
+
* basic-block.h (flow_delete_block_noexpunge): Declare.
(expunge_block_nocompact): Declare.
* cfg.c (expunge_block_nocompact): Split out from ...
return DECL_RTL (exp);
case INTEGER_CST:
- return immed_double_const (TREE_INT_CST_LOW (exp),
+ temp = immed_double_const (TREE_INT_CST_LOW (exp),
TREE_INT_CST_HIGH (exp), mode);
+ /* ??? If overflow is set, fold will have done an incomplete job,
+ which can result in (plus xx (const_int 0)), which can get
+ simplified by validate_replace_rtx during virtual register
+ instantiation, which can result in unrecognizable insns.
+ Avoid this by forcing all overflows into registers. */
+ if (TREE_CONSTANT_OVERFLOW (exp))
+ temp = force_reg (mode, temp);
+
+ return temp;
+
case CONST_DECL:
return expand_expr (DECL_INITIAL (exp), target, VOIDmode, 0);