* regmove.c (kill_value): Handle subregs.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@49748 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 8 insertions, 0 deletions

diff --git a/gcc/regrename.c b/gcc/regrename.c
index 135eaefd0e1..3ae6f7f6b45 100644
--- a/gcc/regrename.c
+++ b/gcc/regrename.c
@@ -1095,6 +1095,14 @@ kill_value (x, vd)
      rtx x;
      struct value_data *vd;
 {
+  /* SUBREGS are supposed to have been eliminated by now.  But some
+     ports, e.g. i386 sse, use them to smuggle vector type information
+     through to instruction selection.  Each such SUBREG should simplify,
+     so if we get a NULL  we've done something wrong elsewhere. */
+
+  if (GET_CODE (x) == SUBREG)
+    x = simplify_subreg (GET_MODE (x), SUBREG_REG (x),
+			 GET_MODE (SUBREG_REG (x)), SUBREG_BYTE (x));
   if (REG_P (x))
     {
       unsigned int regno = REGNO (x);