(build_binary_op): Don't set shorten for signed division.

From-SVN: r1623

diff --git a/gcc/c-typeck.c b/gcc/c-typeck.c
index 42d2be0686d980e7b9ae6f1b0e6e5388eba3abac..7b9342914a1670dec894dc69d40de70c789ac9bb 100644 (file)
--- a/gcc/c-typeck.c
+++ b/gcc/c-typeck.c
@@ -2283,7 +2283,9 @@ build_binary_op (code, orig_op0, orig_op1, convert_p)
          if (!(code0 == INTEGER_TYPE && code1 == INTEGER_TYPE))
            resultcode = RDIV_EXPR;
          else
-           shorten = 1;
+           /* When dividing two signed integers, you have to promote to int.
+              E.g. (short) -32868 / (short) -1 doesn't fit in a short.  */
+           shorten = TREE_UNSIGNED (op0);
          common = 1;
        }
       break;