[PATCH, i386]: Committed: Fix PR target/35496

[Uros Bizjak]

Hello!

We have to compute alignment of VECTOR_CST and INTEGER_CST constants via 
ALIGN_MODE_128 in the same way as other ALIGN_MODE_128 data is aligned.

2008-03-09  Uros Bizjak  <ubizjak@gmail.com>

        PR target/35496
        * config/i386/i386.c (ix86_constant_algnment): Compute alignment 
using
        ALIGN_MODE_128 for VECTOR_CST and INTEGER_CST in addition to 
REAL_CST.

Patch was bootstrapped and regression tested on x86_64-pc-linux-gnu 
{,-m32}. Patch is committed to mainline, but I think that it should be 
committed to 4.3 branch as well.

Uros.

Index: config/i386/i386.c
===================================================================
--- config/i386/i386.c  (revision 133051)
+++ config/i386/i386.c  (working copy)
@@ -16789,7 +16789,8 @@
 int
 ix86_constant_alignment (tree exp, int align)
 {
-  if (TREE_CODE (exp) == REAL_CST)
+  if (TREE_CODE (exp) == REAL_CST || TREE_CODE (exp) == VECTOR_CST
+      || TREE_CODE (exp) == INTEGER_CST)
     {
       if (TYPE_MODE (TREE_TYPE (exp)) == DFmode && align < 64)
        return 64;