* combine.c (make_compound_operation): Don't generate zero / sign

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

diff --git a/gcc/combine.c b/gcc/combine.c
index 4a2ae3c..10ee904 100644 (file)
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -6629,7 +6629,11 @@ make_compound_operation (x, in_code)
          if (GET_MODE_SIZE (mode) > GET_MODE_SIZE (GET_MODE (tem))
              || (GET_MODE_SIZE (mode) >
                  GET_MODE_SIZE (GET_MODE (XEXP (tem, 0)))))
-           tem = gen_rtx_fmt_e (GET_CODE (tem), mode, XEXP (tem, 0));
+           {
+             if (! INTEGRAL_MODE_P (mode))
+               break;
+             tem = gen_rtx_fmt_e (GET_CODE (tem), mode, XEXP (tem, 0));
+           }
          else
            tem = gen_lowpart_for_combine (mode, XEXP (tem, 0));
          return tem;