r192439 - in /trunk/gcc: ChangeLog loop-unroll....

[steven@gcc.gnu.org]

Author: steven
Date: Sun Oct 14 19:29:18 2012
New Revision: 192439

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192439
Log:
gcc/
	PR rtl-optimization/54919
	* loop-unroll.c (struct var_to_expand): Remove accum_pos field.
	(analyze_insn_to_expand_var): Do not record accum_pos.
	(expand_var_during_unrolling): Use validate_replace_rtx_group to
	perform replacement of all references to SET_DEST (set) with the
	new register, including references in REG_EQUAL notes.
	(insert_var_expansion_initialization): Insert initializatio insns
	at the bottom of the pre-header of the loop.

testsuite/
	PR rtl-optimization/54919
	* gcc.dg/pr54919.c: New testcase.


Added:
    trunk/gcc/testsuite/gcc.dg/pr54919.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/loop-unroll.c
    trunk/gcc/testsuite/ChangeLog