r122807 - in /trunk/gcc: ChangeLog cfglayout.c ...

[steven@gcc.gnu.org]

Author: steven
Date: Sat Mar 10 23:33:40 2007
New Revision: 122807

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=122807
Log:
	* lower-subreg.c: Include except.h.
	(decompose_multiword_subregs): Verify that the only control flow
	insns we can split are loads to multi-words pseudos.
	Handle breaking such blocks after splitting, instead of calling
	find_many_sub_basic_blocks.

	* loop-unroll.c (split_edge_and_insert): Don't set BB_SUPERBLOCK
	on the new basic block.  Add a lengthy comment explaining why we
	thought this was necessary.
	* cfglayout.c (cfg_layout_finalize): Don't break superblocks.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfglayout.c
    trunk/gcc/loop-unroll.c
    trunk/gcc/lower-subreg.c