- critical fix.

Changed files:
    gcc-pr27603.patch -> 1.1.2.1

diff --git a/gcc-pr27603.patch b/gcc-pr27603.patch
new file mode 100644 (file)
index 0000000..290cd10
--- /dev/null
+++ b/gcc-pr27603.patch
@@ -0,0 +1,28 @@
+--- gcc-4_1-branch/gcc/tree-ssa-loop-niter.c   (wersja 113819)
++++ gcc-4_1-branch/gcc/tree-ssa-loop-niter.c   (wersja 113820)
+@@ -1562,15 +1562,20 @@
+ 
+                   utype = unsigned_type_for (type);
+                   if (tree_int_cst_lt (step, integer_zero_node))
+-                    diff = fold_build2 (MINUS_EXPR, utype, init,
++                    diff = fold_build2 (MINUS_EXPR, type, init,
+                                         TYPE_MIN_VALUE (type));
+                   else
+-                    diff = fold_build2 (MINUS_EXPR, utype,
++                    diff = fold_build2 (MINUS_EXPR, type,
+                                         TYPE_MAX_VALUE (type), init);
+ 
+-                  estimation = fold_build2 (CEIL_DIV_EXPR, utype, diff,
+-                                            step);
+-                  record_estimate (loop, estimation, boolean_true_node, stmt);
++                  if (integer_nonzerop (step))
++                    {
++                      estimation = fold_build2 (CEIL_DIV_EXPR, type, diff,
++                                                step);
++                      record_estimate (loop,
++                                       fold_convert (utype, estimation),
++                                       boolean_true_node, stmt);
++                    }
+                 }
+ 
+               break;