Comment 26 for bug 968766

Author: uweigand
Date: Fri May 4 14:56:48 2012
New Revision: 187162

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=187162
Log:
2012-05-04 Ulrich Weigand <email address hidden>

  Backport from mainline:

  2012-05-04 Ulrich Weigand <email address hidden>

  PR tree-optimization/52633
  * tree-vect-patterns.c (vect_vect_recog_func_ptrs): Swap order of
  vect_recog_widen_shift_pattern and vect_recog_over_widening_pattern.
  (vect_recog_over_widening_pattern): Remove handling of code that was
  already detected as over-widening pattern. Remove special handling
  of "unsigned" cases. Instead, support general case of conversion
  of the shift result to another type.

  2012-05-04 Ulrich Weigand <email address hidden>

  * tree-vect-patterns.c (vect_single_imm_use): New function.
  (vect_recog_widen_mult_pattern): Use it instead of open-coding loop.
  (vect_recog_over_widening_pattern): Likewise.
  (vect_recog_widen_shift_pattern): Likewise.

  2012-04-10 Ulrich Weigand <email address hidden>

  PR tree-optimization/52870
  * tree-vect-patterns.c (vect_recog_widen_mult_pattern): Verify that
  presumed pattern statement is within the same loop or basic block.

2012-05-04 Ulrich Weigand <email address hidden>

  Backport from mainline:

  2012-05-04 Ulrich Weigand <email address hidden>

  PR tree-optimization/52633
  * gcc.dg/vect/vect-over-widen-1.c: Two patterns should now be
  recognized as widening shifts instead of over-widening.
  * gcc.dg/vect/vect-over-widen-1-big-array.c: Likewise.
  * gcc.dg/vect/vect-over-widen-4.c: Likewise.
  * gcc.dg/vect/vect-over-widen-4-big-array.c: Likewise.
  * gcc.target/arm/pr52633.c: New test.

  2012-04-10 Ulrich Weigand <email address hidden>

  PR tree-optimization/52870
  * gcc.dg/vect/pr52870.c: New test.

Added:
    branches/gcc-4_7-branch/gcc/testsuite/gcc.dg/vect/pr52870.c
    branches/gcc-4_7-branch/gcc/testsuite/gcc.target/arm/pr52633.c
Modified:
    branches/gcc-4_7-branch/gcc/ChangeLog
    branches/gcc-4_7-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_7-branch/gcc/testsuite/gcc.dg/vect/vect-over-widen-1-big-array.c
    branches/gcc-4_7-branch/gcc/testsuite/gcc.dg/vect/vect-over-widen-1.c
    branches/gcc-4_7-branch/gcc/testsuite/gcc.dg/vect/vect-over-widen-4-big-array.c
    branches/gcc-4_7-branch/gcc/testsuite/gcc.dg/vect/vect-over-widen-4.c
    branches/gcc-4_7-branch/gcc/tree-vect-patterns.c