[Bug rtl-optimization/54919] [4.6/4.7/4.8 Regression] gcc.dg/torture/pr54877.c FAILs with -fvariable-expansion-in-unroller

[steven at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54919

--- Comment #5 from Steven Bosscher <steven at gcc dot gnu.org> 2012-10-14 19:29:22 UTC ---
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