PR middle-end/33436

	* expr.c (emit_group_load_1): Split constant double when destination
	length is half source length.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@128855 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index bdb9d22..42ace4a 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2007-09-27  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
+
+       PR middle-end/33436
+       * expr.c (emit_group_load_1): Split constant double when destination
+       length is half source length.
+
 2007-09-27  Richard Sandiford  <rsandifo@nildram.co.uk>
 
        * config/mips/mips.h (PTF_AVOID_BRANCHLIKELY): New macro.

diff --git a/gcc/expr.c b/gcc/expr.c
index ff3258d..9d2a61a 100644 (file)
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -1776,8 +1776,25 @@ emit_group_load_1 (rtx *tmps, rtx dst, rtx orig_src, tree type, int ssize)
       else if (CONSTANT_P (src) && GET_MODE (dst) != BLKmode
                && XVECLEN (dst, 0) > 1)
         tmps[i] = simplify_gen_subreg (mode, src, GET_MODE(dst), bytepos);
-      else if (CONSTANT_P (src)
-              || (REG_P (src) && GET_MODE (src) == mode))
+      else if (CONSTANT_P (src))
+       {
+         HOST_WIDE_INT len = (HOST_WIDE_INT) bytelen;
+
+         if (len == ssize)
+           tmps[i] = src;
+         else
+           {
+             rtx first, second;
+
+             gcc_assert (2 * len == ssize);
+             split_double (src, &first, &second);
+             if (i)
+               tmps[i] = second;
+             else
+               tmps[i] = first;
+           }
+       }
+      else if (REG_P (src) && GET_MODE (src) == mode)
        tmps[i] = src;
       else
        tmps[i] = extract_bit_field (src, bytelen * BITS_PER_UNIT,