From: Jan Hubicka <jh@suse.cz>
Date: Wed, 13 Feb 2002 22:44:12 +0000 (+0100)
Subject: * regmove.c (kill_value): Handle subregs.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=8686336f51b1197f22304f92b63780169be7c54b;p=gcc.git

* regmove.c (kill_value): Handle subregs.

From-SVN: r49748
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 16340b695e0..ce1b0ce6c23 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+Wed Feb 13 23:41:15 CET 2002  Jan Hubicka  <jh@suse.cz>
+
+	* regmove.c (kill_value): Handle subregs.
+
 Wed Feb 13 23:34:30 CET 2002  Jan Hubicka  <jh@suse.cz>
 
 	* i386.md (mul patterns): Allow memory operand to be first;
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);