2010-01-15  Jing Yu  <jingyu@google.com>

	PR rtl-optimization/42691
        * combine.c (try_combine): Set changed_i3_dest to 1 when I2 and I3 set
	a pseudo to a constant and are merged, and adjust comments.

2010-01-15  Jing Yu  <jingyu@google.com>

	PR rtl-optimization/42691
	* gcc.c-torture/execute/pr42691.c: New.

From-SVN: r155948