re PR target/68269 (FAIL: gcc.dg/pr68129_1.c (internal compiler error))

	PR target/68269
	* combine.c (expand_field_assignment): Punt if compute_mode is
	unsupported scalar mode.

From-SVN: r232366

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 4cf1e815ce4ffc30283888f1dd7e7db6363bce4d..fe9a60a0c77926b300b2c348177e7a9863d76e74 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2016-01-14  Jakub Jelinek  <jakub@redhat.com>
+
+       PR target/68269
+       * combine.c (expand_field_assignment): Punt if compute_mode is
+       unsupported scalar mode.
+
 2016-01-14  Richard Biener  <rguenther@suse.de>
 
        PR tree-optimization/66856

diff --git a/gcc/combine.c b/gcc/combine.c
index d088031b853f8b7f407325a071ef02afa18f8751..2f913dd8ea973acdedfe77d03ab252000c5547a6 100644 (file)
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -7247,6 +7247,10 @@ expand_field_assignment (const_rtx x)
       if (len >= HOST_BITS_PER_WIDE_INT)
        break;
 
+      /* Don't try to compute in too wide unsupported modes.  */
+      if (!targetm.scalar_mode_supported_p (compute_mode))
+       break;
+
       /* Now compute the equivalent expression.  Make a copy of INNER
         for the SET_DEST in case it is a MEM into which we will substitute;
         we don't want shared RTL in that case.  */