2003-03-10 Franz Sirl <Franz.Sirl-kernel@lauterbach.com>

[pf3gnuchains/gcc-fork.git] / gcc / emit-rtl.c

diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index dbc0a37..9ba8539 100644 (file)
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -1371,6 +1371,13 @@ gen_lowpart (mode, x)
     {
       /* The only additional case we can do is MEM.  */
       int offset = 0;
+
+      /* The following exposes the use of "x" to CSE.  */
+      if (GET_MODE_SIZE (GET_MODE (x)) <= UNITS_PER_WORD
+         && SCALAR_INT_MODE_P (GET_MODE (x))
+         && ! no_new_pseudos)
+       return gen_lowpart (mode, force_reg (GET_MODE (x), x));
+
       if (WORDS_BIG_ENDIAN)
        offset = (MAX (GET_MODE_SIZE (GET_MODE (x)), UNITS_PER_WORD)
                  - MAX (GET_MODE_SIZE (mode), UNITS_PER_WORD));