* g++.dg/crash38.C: moved into proper directory...

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

diff --git a/gcc/expr.c b/gcc/expr.c
index 00419c8..9743c2a 100644 (file)
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -3924,10 +3924,18 @@ expand_assignment (tree to, tree from)
 
       if (offset != 0)
        {
-         rtx offset_rtx = expand_expr (offset, NULL_RTX, VOIDmode, EXPAND_SUM);
+         rtx offset_rtx;
 
-         gcc_assert (MEM_P (to_rtx));
+         if (!MEM_P (to_rtx))
+           {
+             /* We can get constant negative offsets into arrays with broken
+                user code.  Translate this to a trap instead of ICEing.  */
+             gcc_assert (TREE_CODE (offset) == INTEGER_CST);
+             expand_builtin_trap ();
+             to_rtx = gen_rtx_MEM (BLKmode, const0_rtx);
+           }
 
+         offset_rtx = expand_expr (offset, NULL_RTX, VOIDmode, EXPAND_SUM);
 #ifdef POINTERS_EXTEND_UNSIGNED
          if (GET_MODE (offset_rtx) != Pmode)
            offset_rtx = convert_to_mode (Pmode, offset_rtx, 0);