2007-07-02 Andrew Pinski <andrew_pinski@playstation.sony.com>

        * rtlhooks.c (gen_lowpart_if_possible): Check for
        invalid subreg before calling gen_lowpart_SUBREG.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@126230 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d0fc5be..2ef7b32 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2007-07-02  Andrew Pinski  <andrew_pinski@playstation.sony.com>
+
+       * rtlhooks.c (gen_lowpart_if_possible): Check for
+       invalid subreg before calling gen_lowpart_SUBREG.
+
 2007-07-02  Geoffrey Keating  <geoffk@apple.com>
 
        * config/darwin9.h: Add copyright notice.

diff --git a/gcc/rtlhooks.c b/gcc/rtlhooks.c
index ece7198..79fcb44 100644 (file)
--- a/gcc/rtlhooks.c
+++ b/gcc/rtlhooks.c
@@ -161,7 +161,9 @@ gen_lowpart_if_possible (enum machine_mode mode, rtx x)
 
       return new;
     }
-  else if (mode != GET_MODE (x) && GET_MODE (x) != VOIDmode)
+  else if (mode != GET_MODE (x) && GET_MODE (x) != VOIDmode
+          && validate_subreg (mode, GET_MODE (x), x,
+                               subreg_lowpart_offset (mode, GET_MODE (x))))
     return gen_lowpart_SUBREG (mode, x);
   else
     return 0;