(const_binop): Don't call size_int if low < 0.

From-SVN: r13617

(const_binop): Don't call size_int if low < 0.
From-SVN: r13617
580ceef2 · Richard Kenner · 88029ff8 · 580ceef2
Commit 580ceef2 authored Feb 07, 1997 by Richard Kenner
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gcc/fold-const.c
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--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -1212,7 +1212,7 @@ const_binop (code, arg1, arg2, notrunc)
 	}
    got_it:
      if (TREE_TYPE (arg1) == sizetype && hi == 0
-	  && low <= TREE_INT_CST_LOW (TYPE_MAX_VALUE (sizetype))
+	  && low >= 0 && low <= TREE_INT_CST_LOW (TYPE_MAX_VALUE (sizetype))
 	  && ! overflow
 	  && ! TREE_OVERFLOW (arg1) && ! TREE_OVERFLOW (arg2))
 	t = size_int (low);