gcc/gcc ChangeLog tree-ssa-dce.c testsuite/Cha ...

[law@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	law@gcc.gnu.org	2005-07-06 05:25:57

Modified files:
	gcc            : ChangeLog tree-ssa-dce.c 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/gcc.c-torture/compile: pr21356.c 

Log message:
	* tree-ssa-dce.c (cfg_altered): New global.
	(tree_dce_init): Initialize cfg_altered.
	(remove_dead_stmt): If we remove an edge in the CFG, then set
	CFG_ALTERED.
	(perform_tree_ssa_dce): If we altered the CFG, then invalidate
	the dominators.
	
	* gcc.c-torture/compile/pr21356.c: New test.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.9352&r2=2.9353
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-dce.c.diff?cvsroot=gcc&r1=2.46&r2=2.47
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.5726&r2=1.5727
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.c-torture/compile/pr21356.c.diff?cvsroot=gcc&r1=NONE&r2=1.1